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1
Starostin, E. A., A. P. Lebedev, M. S. Moskovskih, and E. P. Maslov. "Development of technology to ensure minimal thermal resistance between mating surfaces while simulating outer space conditions." Spacecrafts & Technologies 3, no. 4 (December 25, 2019): 216–21. http://dx.doi.org/10.26732/2618-7957-2019-4-216-221.
Повний текст джерелаАнотація:
The transition to the leaky design of the instrument compartment of the spacecraft inevitably leads to additional thermal loads on the components of the onboard electronic equipment due to a change in the heat transfer scheme. The thermal mode of operation of the onboard radio-electronic equipment of the spacecraft is one of the important factors for ensuring the long term active existence of the spacecraft. Ensuring the long term of active existence of spacecraft is the most important scientific, engineering and economic task, the solution of which requires a deep systematic approach at all stages of the creation and operation of onboard electronic equipment of the spacecraft. The strategic objective for ensuring the long term of the spacecraft’s active existence is the implementation at all stages of the life cycle of onboard radio-electronic equipment of the highest achievable reliability indicators through the using of modern design and technological solutions, as well as effective methods for its design and production. This article presents the results of experimental work to reduce heat transfer resistance between onboard electronic equipment and the spacecraft’s thermal control system. As a result of the work, the main data were obtained on improving the heat sink efficiency of the energy-converting equipment of the spacecraft, the effectiveness of measures to ensure heat removal of the onboard radio-electronic equipment of the spacecraft was confirmed.
2
Kharin, E. G., V. G. Polikarpov, I. A. Kopylov, V. A. Kopelovich, and V. R. Kozhurin. "Onboard trajectory equipment measurements." IEEE Aerospace and Electronic Systems Magazine 22, no. 3 (March 2007): 26–29. http://dx.doi.org/10.1109/maes.2007.340504.
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3
Golovanov, S. V., A. A. Meshcheryakov, V. Yu Murzin, and P. B. Lagov. "Refined Calculation Assessment of Failure and Fault Tolerance of Sensitive Electronic Components with Actual Mass Protection." Rocket-space device engineering and information systems 8, no. 4 (2021): 77–85. http://dx.doi.org/10.30894/issn2409-0239.2021.8.4.77.85.
Повний текст джерелаАнотація:
Nowadays rocket and space industry enterprises use a simplified method to evaluate failure and fault tolerance of the onboard equipment to single event effects (SEEs), when the calculation is performed for the minimum mass protection thickness (g/cm2 ) of potentially sensitive electronic components determined, as a rule, by the minimum wall thickness of the device under consideration. In this case, all structural elements of the onboard equipment, spacecraft, and neighboring devices are not included, which, in many cases, leads to a significant overestimation of the calculated SEEs frequency especially for large scale integration ICs. Neglecting the actual mass protection may require redundant measures to ensure failure and fault tolerance. The work proposes an improved approach of calculating failure and fault tolerance of sensitive electronic components and onboard equipment to the impact of heavy charged particles and high-energy protons that causes SEEs, which consists in using programs for calculating absorbed doses by the sectorization method in three-dimensional models, which makes possible to determine the minimum, maximum, and average mass protection of electronic components with the complete design of the onboard equipment and spacecraft.
4
Krasnov, M. I., and V. B. Steshenko. "Electrical, Electronic and Electromechanical Parts for Space Applications." Rocket-space device engineering and information systems 8, no. 2 (2021): 88–101. http://dx.doi.org/10.30894/issn2409-0239.2021.8.2.88.101.
Повний текст джерелаАнотація:
The electrical, electronic and electromechanical parts (EEE parts) used in spacecraft onboard equipment must fully provide the target technical characteristics of radio-electronic equipment in terms of functional and electrical characteristics, as well as resistance to external factors and reliability indicators. The authors of the article analyze the current situation with the EEE parts and consider the prospects for the development and creation of the necessary electronics products. Currently, the results of the work are confirmed by the active use of the created space components in space technology.
5
Kovel, A. A. "Stages of information support of development of on-board equipment for spacecraft." Spacecrafts & Technologies 5, no. 3 (September 24, 2021): 166–76. http://dx.doi.org/10.26732/j.st.2021.3.06.
Повний текст джерелаАнотація:
The ground-experimental testing of the elements of space technology is a crucial stage in the creation of space products, in fact, this is the ground «flight» of the devices being created. And how well the operating conditions will be reproduced at this stage and the successful functioning of the devices under the expected conditions is ensured, its successful operation in real flight during the service life depends. The radio electronic devices of the onboard equipment of the spacecraft are one of the essential elements that ensure the fulfillment of target tasks, which should confirm their readiness for the forthcoming work at the stage of groundbased experimental testing. The article discusses the stages of information support for the development of spacecraft onboard equipment, showing the ways to improve the technology of ground-based experimental testing of spacecraft onboard equipment. It is shown that at the present stage of development of the space industry, it has become possible to introduce the methodology of mathematical planning of an experiment into engineering practice. A backlog of applied work on radio-electronic topics h as appeared, showing the possibility of revealing in a full factorial experiment the influence of internal uncontrollable parameters (factors) of electronic components on the experimental results. This removed the obstacle to the implementation of the capabilities of the method in research and improvement of radio electronic devices onboard equipment.
6
Dyson, Ab Hashemi, Elizabeth. "Performance Characterization of High-Power Electronic Equipment onboard an Aircraft." Heat Transfer Engineering 21, no. 1 (January 2000): 15–24. http://dx.doi.org/10.1080/014576300271121.
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7
Li, Song, Hongli Zhao, and Jinmin Ma. "An Edge Computing-Enabled Train Obstacle Detection Method Based on YOLOv3." Wireless Communications and Mobile Computing 2021 (October 8, 2021): 1–9. http://dx.doi.org/10.1155/2021/7670724.
Повний текст джерелаАнотація:
Rail transit is developing towards intelligence which takes lots of computation resource to perform deep learning tasks. Among these tasks, object detection is the most widely used, like track obstacle detection, catenary wear, and defect detection and looseness detection of train wheel bolts. But the limited computation capability of the train onboard equipment prevents running deep and complex detection networks. The limited computation capability of the train onboard equipment prevents conducting complex deep learning tasks. Cloud computing is widely utilized to make up for the insufficient onboard computation capability. However, the traditional cloud computing architecture will bring in uncertain heavy traffic load and cause high transmission delay, which makes it fail to complete real-time computing intensive tasks. As an extension of cloud computing, edge computing (EC) can reduce the pressure of cloud nodes by offloading workloads to edge nodes. In this paper, we propose an edge computing-based method. The onboard equipment on a fast-moving train is responsible for acquiring real-time images and completing a small part of the inference task. Edge computing is used to help execute the object detection algorithm on the trackside and carry most of the computing power. YOLOv3 is selected as the object detection model, since it can balance between the real-time and accurate performance on object detection compared with two-stage models. To save onboard equipment computation resources and realize the edge-train cooperative interface, we propose a model segmentation method based on the existing YOLOv3 model. We implement the cooperative inference scheme in real experiments and find that the proposed EC-based object detection method can accomplish real-time object detection tasks with little onboard computation resources.
8
Andreev, V. A., A. V. Bourdine, and V. A. Burdin. "Comprehensive solution for onboard fiber-optic information networks." Radio industry (Russia) 30, no. 4 (December 23, 2020): 8–13. http://dx.doi.org/10.21778/2413-9599-2020-30-4-8-13.
Повний текст джерелаАнотація:
Problem statement. In recent years, the problem of replacing copper-core fiber-optic cables has become particularly relevant. This is due to two factors: first, the prospect of introducing unmanned vehicles and the development of electromagnetic microwave weapons that can disable electronic equipment for almost any target at a distance of 10 km or more, and second, the growing need to reduce the delay of transmitted signals on the network and increase the volume of information transmitted in these networks. The article describes the construction of onboard cable networks using fiberoptic cables. The advantages and disadvantages of fiber-optic based onboard networks are described.Objective. Development of solutions for the use of fiber-optic communication cables in onboard information networks that provide high technology for laying optical cables, the required speed of information transmission, ease of operation and modernization of information networks.Results. A comprehensive solution for building onboard information networks based on fiber-optic cables having an increased core diameter and an optimized refractive index profile in pipelines using pneumatic laying technology is proposed.Practical implications. The proposed integrated solution for onboard fiber-optic information networks, including a method for onboard laying optical cables, the use of specially developed optical fiber with an increased core diameter and reduced differential modal delay, and the development of modular telecommunications equipment, allows meeting the requirements for onboard networks to ensure reliability and safety, economic efficiency, reduce labor intensity, and ease of maintenance, components dismantling and replacement.
9
Nedobegkin, M. I., V. A. Sinitsyn, E. A. Sinitsyn, and S. Yu Strakhov. "FEATURES OF SOLVING PROBLEM OF SHARING RADIO FREQUENCY RANGE ON-BOARD EQUIPMENT OF RADIO SYSTEMS OF SHORT-RANGE NAVIGATION AND LTE NETWORKS." Issues of radio electronics, no. 6 (June 21, 2019): 46–52. http://dx.doi.org/10.21778/2218-5453-2019-6-46-52.
Повний текст джерелаАнотація:
It is shown that the joint use of radio frequency range onboard equipment radio systems near navigation (RSBN) and LTE networks requires both organizational and technical measures, and the implementation of measures of conversion of the radio frequency spectrum on a local‑territorial principle. Attention is drawn to the need for the improvement of on‑Board equipment of the RSBN with modes of short‑range and inter‑flight navigation, taking into account the needs of users of the national frequency resource. It is noted that the cardinal solution to the problem of conversion of the considered frequency band is the transfer of on‑Board equipment of the RSBN from the domestic frequency range occupied by the LTE communication network to the international frequency range of the air radio navigation service 960–1215 MHz. The solution of the problem of joint use of the frequency band 791–821 MHz by the onboard equipment of radio engineering systems of short‑range navigation and radio electronic means of LTE networks for the transition period until the conversion is completed is possible by reducing the frequency resource (channels) for the on‑Board equipment of RSBN with the modes of short‑range and inter‑flight navigation or redistribution of the frequency resource initially nominated for the competition for radio electronic means of the LTE‑800 standard.
10
Simion, Dragoș. "Maintenance onboard ships using computer maintenance management system." Scientific Bulletin of Naval Academy XXIII, no. 1 (July 15, 2020): 134–41. http://dx.doi.org/10.21279/1454-864x-20-i1-017.
Повний текст джерелаАнотація:
The importance and the role of the maintenance process are based on keeping the equipment and systems in an operative state of readiness. On the other hand, the knowledge of legislative framework, as well as the learning the practical skills lead to the successful application of the maintenance programs within the organizations. Regarding these aspects, the present paper addresses the topic of maintenance onboard ships. The general legislative framework for management and execution of the maintenance process specific to the maritime domain is presented, as well as the methods implemented onboard ships. It is described how to perform the maintenance of the equipment for a special ship using a computer maintenace management softwere. The study takes into account the constructive features, the equipment and the missions of the ship.
11
Belomoytsev, Dmitrii E., Tamara M. Volosatova, Anastasiya A. Kozar, Mikhail V. Filippov, and Nikolai V. Chichvarin. "MODELING FOR THREATS IN THE INFORMATION SECURITY OF INTEGRATED MODULAR AVIONICS." RSUH/RGGU Bulletin. Series Information Science. Information Security. Mathematics, no. 3 (2021): 52–73. http://dx.doi.org/10.28995/2686-679x-2021-3-52-73.
Повний текст джерелаАнотація:
The article presents results of researches and the analysis of means of unauthorized access and Directors of hindrances to means of communication and navigation of aircraft. It also shows that the issue of protecting automated systems of aviation equipment from threats to information security is becoming increasingly important in the context of an increase in the level of automation for prospective aircraft engines, onboard equipment, systems and units of aircraft, an increase in the complexity of onboard information systems. There is an analysis in the means of electronic warfare, capable of influencing the flight of an aircraft, both intentionally and unintentionally. There also is a statistical inference of aviation accidents on various aircraft flight phases. The airplane mathematical model constructed taking into account hindrances and harmful impacts on the onboard equipment is developed. Static stability of the plane longitudinal movement taking into account the external environment is investigated. The article gives results of a numerical experiment showing offered mathematical model high degree of adequacy. The materials of the publication contain the results of theoretical research and numerical experiment conducted using a mathematical model of the dynamics of controlled flight of the aircraft under the action of both natural noise and intentional harmful effects on the means of communication and navigation of AIRCRAFT, as well as hacker attacks on onboard computing facilities. The model is implemented in Matlab/Simulink, which allows building a workstation simulator. That in turn allows for taking into account the “human factor” when modeling the flight of an aircraft.
12
Kozyukov, Aleksandr, Pavel Chubunov, Konstantin Zolnikov, Pavel Kuc'ko, Tatyana Skvortsova, and I. Zhuravleva. "Classification of the effects of AI CP on REE." Modeling of systems and processes 14, no. 3 (September 22, 2021): 22–28. http://dx.doi.org/10.12737/2219-0767-2021-14-3-22-28.
Повний текст джерелаАнотація:
During the flight, charged particles of outer space act on space systems (orbital stations, spacecraft, interplanetary spacecraft, etc.), which, without the use of special protection measures, can lead to the failure of onboard systems. They are particularly dangerous for systems that use electronic components (semiconductor devices and integrated circuits, optoelectronic devices). These systems in the spacecraft, as a rule, include all control systems, telemetry systems, receiving and transmitting devices, thermal control systems, power supply systems, etc., which in general can be called radio-electronic equipment (REE).
13
Lysenko, A. V., N. V. Goryachev, V. A. Trusov, I. I. Kochegarov, and N. K. Yurkov. "An Adaptive Control of the Board Oscillations of Onboard Radio-electronic Equipment in the Resonant Mode." Procedia Computer Science 150 (2019): 230–36. http://dx.doi.org/10.1016/j.procs.2019.02.047.
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14
Chen, Yuche, Ruixiao Sun, and Xuanke Wu. "Estimating Bounds of Aerodynamic, Mass, and Auxiliary Load Impacts on Autonomous Vehicles: A Powertrain Simulation Approach." Sustainability 13, no. 22 (November 10, 2021): 12405. http://dx.doi.org/10.3390/su132212405.
Повний текст джерелаАнотація:
Vehicle automation requires new onboard sensors, communication equipment, and/or data processing units, and may encourage modifications to existing onboard components (such as the steering wheel). These changes impact the vehicle’s mass, auxiliary load, coefficient of drag, and frontal area, which then change vehicle performance. This paper uses the powertrain simulation model FASTSim to quantify the impact of autonomy-related design changes on a vehicle’s fuel consumption. Levels 0, 2, and 5 autonomous vehicles are modeled for two battery-electric vehicles (2017 Chevrolet Bolt and 2017 Nissan Leaf) and a gasoline powered vehicle (2017 Toyota Corolla). Additionally, a level 5 vehicle is divided into pessimistic and optimistic scenarios which assume different electronic equipment integration format. The results show that 4–8% reductions in energy economy can be achieved in a L5 optimistic scenario and an 10–15% increase in energy economy will be the result in a L5 pessimistic scenario. When looking at impacts on different power demand sources, inertial power is the major power demand in urban driving conditions and aerodynamic power demand is the major demand in highway driving conditions.
15
Šarolić, Antonio, and Borivoj Modlic. "Radiation Hazard Aspect of Shipboard Radiocommunication Equipment." Journal of Communications Software and Systems 3, no. 2 (June 21, 2007): 123. http://dx.doi.org/10.24138/jcomss.v3i2.261.
Повний текст джерелаАнотація:
The paper analyzes the electromagnetic (EM) radiofrequency (RF) radiation hazards onboard a ship arising from shipboard radiocommunication and navigation equipment. EM field effect on personnel and equipment can be harmful if field levels exceed the threshold values. These fields need to be controlled for proper protection. Ships are equipped with lots of EM RF radiation sources with different frequencies and output power levels. Typical shipboard EM RF radiation sources include: terrestrial radiocommunication transmitters, navigational radars and satellite ship earth stations (SES). Examples of these sources are analyzed in the paper. EM field estimation using simple worst-case calculation is given for a typical HF transmitter, X-band navigational radar and the Inmarsat SES A, B, C, F and M. The estimation problems are discussed. The calculation results are compared with international civil and military standards. The results show that potential hazards exist and that a reasonable amount of caution is needed.
16
Strakhov, S. Yu, A. A. Karasev, and N. V. Sotnikova. "FORMALIZATION AND THE CONSTRUCTION OF A NETWORK MODEL OF TESTING OF THE ELECTRONIC ONBOARD EQUIPMENT OF THE SPACECRAFT WITH THE HELP OF PETRI NETS." Issues of radio electronics, no. 7 (July 20, 2018): 51–58. http://dx.doi.org/10.21778/2218-5453-2018-7-51-58.
Повний текст джерелаАнотація:
In this work the question of creation and application of formal models in the form of varieties of Petri nets to process of the automated electric tests of the automatic spacecraft is considered. At present, automatic spacecraft for various purposes are required to have a long active life. This implies the use of modern electronic components that are resistant to external factors affecting outer space. Electronic equipment, consisting of these components, forms information networks on Board the spasecraft, which leads to the need for a comprehensive electrical inspection of the operation of onboard instruments and systems of such networks in an automated mode. Modeling of the processes taking place in the on-Board electronic units, and the control and verification equipment interacting with it, is of separate interest, as it allows to develop automated testing methods based on the obtained data of the model analysis.
17
Gaynutdinov, R. R., and S. F. Chermoshentsev. "Electromagnetic Interference Emission from Communication Lines of Onboard Equipment of an Unmanned Aerial Vehicle." Journal of Communications Technology and Electronics 65, no. 3 (March 2020): 221–27. http://dx.doi.org/10.1134/s1064226920020059.
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18
Bakerenkov, A. S., Y. R. Shaltaeva, A. S. Rodin, N. S. Glukhov, and V. A. Felitsyn. "Schematic Method of Estimation and Increase of Radiation Hardness of the Onboard Radio-electronic Equipment for Space Applications." KnE Engineering 3, no. 6 (October 8, 2018): 103. http://dx.doi.org/10.18502/keg.v3i6.2980.
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19
Vasil’ev, E. N., and V. A. Derevyanko. "The dynamics of phase changes in a heat storage of thermal control system for onboard radio-electronic equipment." Thermophysics and Aeromechanics 25, no. 3 (May 2018): 461–67. http://dx.doi.org/10.1134/s0869864318030125.
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20
Kochura, Sergey G., Vadim N. Shkolny, Sergey B. Suntsov, Egor А. Morozov, Oleg A. Klimkin, and Vadim M. Karaban. "The Life Cycle Information Support Technologies of the Onboard Radio-Electronic Equipment of the Missile and Space Engineering." Journal of Siberian Federal University. Engineering & Technologies 10, no. 3 (May 2017): 364–71. http://dx.doi.org/10.17516/1999-494x-2017-10-3-364-371.
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21
Tsaplin, S. V., and S. A. Bolychev. "Estimation and analysis of the influence of ionizing radiation on the operation of nanosatellite onboard radio electronic equipment." VESTNIK of Samara University. Aerospace and Mechanical Engineering 20, no. 3 (December 1, 2021): 77–96. http://dx.doi.org/10.18287/2541-7533-2021-20-3-77-96.
Повний текст джерелаАнотація:
The paper presents the results of a calculation aimed to study the influence of ionizing, bremsstrahlung radiation on the operation of a nanosatellite obtained during the implementation of the project 0777-2020-0018 in 2020. A comparative analysis of the results of calculating the specific ionization and radiation energy losses of protons (from 0.1 to 400 MeV) and electrons (from 0.04 to 7 MeV), as well as their path lengths in aluminum according to the formulas of various authors and the database of materials of the National Institute of Standards and Technologies is presented. Based on the analysis results, the annual dose in the aluminum structure of the SamSat ION nanosatellite in a circular sun-synchronous orbit (SSO) is calculated. All calculations are based on the data of the energy spectra of protons and electrons of the SSO given in the Information system Spenvis of the European Space Agency. The results of calculating the integral fluxes in aluminum under the action of protons and electrons of a circular SSO for different thicknesses are obtained, and the fraction of passed particles is shown in the approximation of a single-layer stack. The radiation resistance of the electronic elements ISL70321SEH, ISL73321SEH and Virtex-4QV, Virtex-5QV included in the SamSat ION avionics and its ability to operate during a year was assessed.
22
Leuchter, Jan, Radim Bloudicek, Jan Boril, Josef Bajer, and Erik Blasch. "Influence of Aircraft Power Electronics Processing on Backup VHF Radio Systems." Electronics 10, no. 7 (March 25, 2021): 777. http://dx.doi.org/10.3390/electronics10070777.
Повний текст джерелаАнотація:
The paper describes the influence of power electronics, energy processing, and emergency radio systems (ERS) immunity testing on onboard aircraft equipment and ground stations providing air traffic services. The implementation of next-generation power electronics introduces potential hazards for the safety and reliability of aircraft systems, especially the interferences from power electronics with high-power processing. The paper focuses on clearly identifying, experimentally verifying, and quantifiably measuring the effects of power electronics processing using switching modes versus the electromagnetic compatibility (EMC) of emergency radio systems with electromagnetic interference (EMI). EMI can be very critical when switching power radios utilize backup receivers, which are used as aircraft backup systems or airport last-resort systems. The switching power electronics process produces interfering electromagnetic energy to create problems with onboard aircraft radios or instrument landing system (ILS) avionics services. Analyses demonstrate significant threats and risks resulting from interferences between radio and power electronics in airborne systems. Results demonstrate the impact of interferences on intermediate-frequency processing, namely, for very high frequency (VHF) radios. The paper also describes the methodology of testing radio immunity against both weak and strong signals in accordance with recent aviation standards and guidance for military radio communication systems in the VHF band.
23
Żyluk, Andrzej, Konrad Kuźma, Norbert Grzesik, Mariusz Zieja, and Justyna Tomaszewska. "Fuzzy Logic in Aircraft Onboard Systems Reliability Evaluation—A New Approach." Sensors 21, no. 23 (November 27, 2021): 7913. http://dx.doi.org/10.3390/s21237913.
Повний текст джерелаАнотація:
This paper is a continuation of research into the possibility of using fuzzy logic to assess the reliability of a selected airborne system. The research objectives include an analysis of statistical data, a reliability analysis in the classical approach, a reliability analysis in the fuzzy set theory approach, and a comparison of the obtained results. The system selected for the investigation was the aircraft gun system. In the first step, after analysing the statistical (operational) data, reliability was assessed using a classical probabilistic model in which, on the basis of the Weibull distribution fitted to the operational data, the basic reliability characteristics were determined, including the reliability function for the selected aircraft system. The second reliability analysis, in a fuzzy set theory approach, was conducted using a Mamdani Type Fuzzy Logic Controller developed in the Matlab software with the Fuzzy Logic Toolbox package. The controller was designed on the basis of expert knowledge obtained by a survey. Based on the input signals in the form of equipment operation time (number of flying hours), number of shots performed (shots), and the state of equipment corrosion (corrosion), the controller determines the reliability of air armament. The final step was to compare the results obtained from two methods: classical probabilistic model and fuzzy logic. The authors have proved that the reliability model using fuzzy logic can be used to assess the reliability of aircraft airborne systems.
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Bykov, Alexey P., and Mikhail N. Piganov. "Development of predictive mathematical models of the quality of radio electronic equipment based on the results of autonomous tests." Physics of Wave Processes and Radio Systems 24, no. 1 (May 6, 2021): 39–47. http://dx.doi.org/10.18469/1810-3189.2021.24.1.39-47.
Повний текст джерелаАнотація:
The article discusses the methodology for developing a predictive model (forecasting operator) of the quality of onboard equipment using the extrapolation method. It is shown that the most efficient information about the quality and reliability of the equipment can be obtained from the results of autonomous tests. The choice of the test object was made. A microprocessor temperature controller was chosen as the object of autonomous tests. The transition resistance between the electrical circuits of the microprocessor temperature controller was chosen as a predicted parameter. The results of the training experiment are presented. To construct the forecasting operator, quasi-deterministic models of linear, logarithmic, exponential, and parabolic forms are used. When developing the models, the normalization of predicted parameter by mathematical expectation was used. The choice of predictive models was based on the criteria of minimum average variance, calculated at the test time points, and the minimum values of the probability of erroneous decisions and consumer risk. The research of the developed operator was carried out, probabilistic characteristics of its efficiency are obtained.
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Lyshov, S. M., S. U. Uvaysov, V. V. Chernoverskaya, and Ph L. Q. Han. "Method of vibration diagnostics of the technical condition of electronic equipment structures." Russian Technological Journal 9, no. 2 (April 26, 2021): 44–56. http://dx.doi.org/10.32362/2500-316x-2021-9-2-44-56.
Повний текст джерелаАнотація:
The article considers the method of vibration diagnostics of onboard electronic devices based on the analysis of resonant frequencies. An algorithm for diagnosing mechanical defects of the studied blocks and nodes is presented. The structure of the complex of software tools for diagnostics automation and the results of testing the proposed method are presented. The main goal of the research is to improve the accuracy of identification of design defects of on-Board electronic devices. The transition from the analysis of the frequency response to the resonant frequencies that characterize the physical and mechanical parameters of the structure is due to greater stability and lower measurement error of this characteristic. To achieve this goal, a diagnostic model of the method has been developed that allows taking into account the spread of parameters of the electronic tool, both for the serviceable state and for the state with a defect. To estimate the permissible deviations of resonant frequencies from the nominal values, statistical simulation was performed using the Monte Carlo method. It was also possible to increase the reliability of the results of the physical experiment by determining the best position of the accelerometer in terms of the response received. The article provides a structure and description of the algorithm for searching for it. The results of approbation of the considered method on the example of the printed node of the voltage divider of the control unit of the aircraft are presented. In CAD SolidWorks, the serviceable state of the test node was modeled, for which four resonant frequencies were determined, and the state with a defect in the form of a detachment of the attachment. Analysis of the results showed a shift of three values of resonant frequencies relative to the correct state. The conducted series of 10 tests revealed the defect in all 10 cases (with the permissible error of the research result). This indicates a high degree of reliability of the data obtained, the adequacy of the diagnostic model of the method and the correctness of the applied algorithms.
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Bujak, Krystian, Norbert Grzesik, and Konrad Kuźma. "The Use of a Fuzzy Logic to Eliminate an Error in Measuring the Flight Altitude of the W-3 „Sokół” Helicopter." Journal of KONBiN 45, no. 1 (March 1, 2018): 125–41. http://dx.doi.org/10.2478/jok-2018-0007.
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Abstract Along with the growing technology, helicopters are equipped with increasingly complex avionics and operational control systems. Such devices use a variety of input signals in order to enhance their performance. Owing to the use of electronic control systems, modern helicopters have a wide range of possibilities, both in terms of manoeuvrability and combat. The article presents a case study of designing equipment control systems on the example of a radio altimeter, which is mounted onboard the W-3 “Sokół” helicopter. The primary assumption was to design a fuzzy controller using FuzzyLogic Toolbox in the Matlab software package that will facilitate similar results, and, above all, will eliminate the altitude measurement error resulting from the bank of a helicopter.
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Martynov, V. L., I. L. Skripnik, Y. G. Ksenofontov, and M. S. Shimanskaya. "On-board electronic telecommunication equipment with laser illumination in integrated search systems of underwater vehicles." Informatization and communication 4 (April 2021): 20–28. http://dx.doi.org/10.34219/2078-8320-2021-12-4-20-28.
Повний текст джерелаАнотація:
The intensive development of autonomous underwater robotic complexes is very important for the development of the World Ocean. One of the main problems of using underwater robotic complexes is an increase searching efficiency of underwater devices based on the integration of the capabilities of onboard radio-electronic systems of obtaining information in various physical fields. Analyzing the physical basis of the search, including the consideration of the environment of its conduct, objects, as well as detection tools, it can be noted that the result of the search operations of the same objects in the same water areas for various underwater robotic complexes depends on what means of detection they are equipped. The presence of a certain set of the technical means will specify the development of the optimal sequence of actions of the search algorithm. The creation of such algorithms in relation to the task of increasing the search potential of underwater robotics will determine the direction of the research that ensures the formation of an optimal system of underwater search. Efficient use of search resources substantiates the conclusion that radio-electronic means of submersibles forming the system of underwater search, include the number of devices functionally interconnected for its effective conduct. The specified combination is aimed at the formation of the so-called integrated search system, which provides an exchange of information between different channels of searching devices about all objects detected. The article provides proposals for the creation of integrated search systems taking into account practical experiments and experience in designing underwater vehicles capable to implement the optimal system of underwater search using laser technologies.
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Xu, Cuidong, Zhu Chen, Ka Cheng, Xiaolin Wang, and Ho Ho. "A Supercapacitor-Based Method to Mitigate Overvoltage and Recycle the Energy of Pantograph Arcing in the High Speed Railway." Energies 12, no. 7 (March 28, 2019): 1214. http://dx.doi.org/10.3390/en12071214.
Повний текст джерелаАнотація:
The pantograph arcing phenomenon may shorten the service life of a pantograph and even destroy onboard devices and instruments, due to the irregular motions of the train and the intermittent line–pantograph disconnection. This paper points out that abrupt inductive energy from the magnetizing inductance of the traction transformer can lead to an electromagnetic transient process with unexpected overvoltage across it. Further, a supercapacitor-based power electronic system is proposed, which can not only redirect the inductive energy to the supercapacitor pack through bidirectional converters but also mitigate the overvoltage across the main electrical equipment when pantograph arcing occurs. Simulation results show the overvoltage could be reduced and the energy stored in the supercapacitor which could also be used to provide energy for sensors or other devices.
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Kondo, Daisuke. "Projection Screen with Wide-FOV and Motion Parallax Display for Teleoperation of Construction Machinery." Journal of Robotics and Mechatronics 33, no. 3 (June 20, 2021): 604–9. http://dx.doi.org/10.20965/jrm.2021.p0604.
Повний текст джерелаАнотація:
The teleoperation of construction machinery has been introduced to mines and disaster sites. However, the work efficiency of teleoperations is lower than that of onboard operations owing to limitations in the viewing angle and insufficient depth information. To solve these problems and realize effective teleoperations, the Komatsu MIRAI Construction Equipment Cooperative Research Center is developing the next-generation teleoperation cockpit. In this study, we develop a display for teleoperations with a wide field-of-view, a portable projection screen, and a system that reproduces motion parallax, which is suitable for depth perception in the operating range of construction machinery.
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D., Iorgulescu. "Analysis of using and operating conditions of the naval power equipment according to the waveinduced ship load." Scientific Bulletin of Naval Academy XIX, no. 1 (July 15, 2018): 247–55. http://dx.doi.org/10.21279/1454-864x-18-i1-038.
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This article analyzes the conditions of operation and exploitation of the ship's power equipment using the meteorological conditions and the type of ship. Based on the naval power systems and new shipbuilding technologies,we are looking for optimization and increased reliability of shipboard automation and navigation systems that are on board. The article analyzes and presents solutions about the complex problems that arise in the work of the engineer that is on board. It is demonstrated the importance of the quality indicators of the naval power system for improving the operating conditions of the existing plants and to modernize the ship by providing new equipment and computers whose optimal working is influenced by the quality of the electrical energy that is onboard. In this paper it is followed the ranking of the implemented control, monitoring and protection of the electrical energy system and the propulsion power of the systems, in which the physical and functional integrity is a vital design philosophy. This can be centralized or distributed by the computers. The study of the waves is done in order to estimate the induced demands in the structure of the ship and their influence on the equipments and the devices that are on-board. The analysis is performed using experimental and theoretical values as input data in the analysis with finite elements. For the estimation of structural strength of the ship and on-board equipment it is necessary to determine the extreme values of the wave-induced loads
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Sokolov, Nikita Yu. "Mathematical Modeling and Optimization Heat Pipe Systems." Journal of Siberian Federal University. Engineering & Technologies 14, no. 7 (November 2021): 860–79. http://dx.doi.org/10.17516/1999-494x-0352.
Повний текст джерелаАнотація:
The results of optimization of the supporting structure of a block of onboard electronic equipment with a built-in single flat heat pipe in the supporting structure with an integrated heat pipe system are presented, using the example of solving a model problem with a single heat source. The comparison was carried out at an equal temperature, occupied volume and for a certain maximum temperature of electrical radio products. The results of computational modeling are presented, demonstrating a comparison of the characteristics of a single flat heat pipe with a system of sequentially located flat heat pipes. Ultimately, the studies carried out have determined the limiting values of the removed thermal power of a single heat pipe, two-level and three-level heat pipe systems with different heat carriers. The versatility of the mathematical model, supplemented by the optimization method, has been confirmed
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Zhu, Junmin, Shuaibing Li, Yang Liu, and Haiying Dong. "A Hybrid Method for the Fault Diagnosis of Onboard Traction Transformers." Electronics 11, no. 5 (March 1, 2022): 762. http://dx.doi.org/10.3390/electronics11050762.
Повний текст джерелаАнотація:
As vital equipment in high-speed train power supply systems, the failure of onboard traction transformers affect the safe and stable operation of the trains. To diagnose faults in onboard traction transformers, this paper proposes a hybrid optimization method based on quickly and accurately using support vector machines (SVMs) as fault diagnosis systems for onboard traction transformers, which can accurately locate and analyze faults. Considering the limitations of traditional transformers for identifying faults, this study used kernel principal component analysis (KPCA) to analyze the feature quantity of dissolved gas analysis (DGA) data, electrical test data, and oil quality test data. The improved seagull optimization algorithm (ISOA) was used to optimize the SVM, and a Henon chaotic map was introduced to initialize the population. Combined with differential evolution (DE) based on the adaptive formula, the foraging formula of the seagull optimization algorithm (SOA) was improved to increase the diversity of the algorithm and enhance its ability to find the optimal parameters of SVM, which made the simulation results more accurate. Finally, the KPCA–ADESOA–SVM model was constructed and applied to fault diagnosis for the traction transformer. The example analysis compared the diagnosis results of the proposed diagnosis model with those of the traditional diagnosis model, showing further optimization of the feature quantity and improvements in the diagnosis accuracy. This proves that the proposed diagnosis model has high generalization performance and can effectively increase the fault diagnosis accuracy and speed of traction transformers.
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Bolkunov, A. A., O. A. Bulychev, and A. V. Volkov. "ASSESSING THE OPPORTUNITIES FOR IMPLEMENTATION OF A HIDDEN CHANNEL FOR CONTROL OF EQUIPMENT BY SIGNAL CIRCUITS OF THE ONBOARD RADAR STATION." Telecommunications and Radio Engineering 72, no. 1 (2013): 73–79. http://dx.doi.org/10.1615/telecomradeng.v72.i1.60.
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Diachenko, D. V., O. V. Abramov, and A. V. Leonov. "Approbation of high-accuracy navigation technology for the benefit of Russia Ministry of Internal Affairs." Radioengineering 8 (2021): 5–10. http://dx.doi.org/10.18127/j00338486-202108-01.
Повний текст джерелаАнотація:
With a view of implantation of space technology in activities of Ministry of Internal Affairs (MIA) and commercial organizations it is necessary to work through technology of robototechnical complex control in real application conditions. Aim. Investigation of reachable accuracy of coordinate definition of moving objects using global space navigation technology for the benefit of MIA. There are examined problems of coordinate definition accuracy increasing using global space navigation technology that were investigated in pilot project «MIA-Roscosmos». There are given results of onboard equipment tests that were worked in the regime of differential correction data using. There were used navigation apparatus of a geodesic class and the mobile measuring-diagnostic laboratory. There are defined possible field of application of navigation apparatus in an activities of MIA. There are formulated recommendations to using of global space navigation apparatus for the benefit of MIA.
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Imai, Masataka, Junichi Kurihara, Toru Kouyama, Toshinori Kuwahara, Shinya Fujita, Yuji Sakamoto, Yuji Sato, et al. "Radiometric Calibration for a Multispectral Sensor Onboard RISESAT Microsatellite Based on Lunar Observations." Sensors 21, no. 7 (April 1, 2021): 2429. http://dx.doi.org/10.3390/s21072429.
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Radiometric calibration utilizing the Moon as a reference source is termed as lunar calibration. It is a useful method for evaluating the performance of optical sensors onboard satellites orbiting the Earth. Lunar calibration provides sufficient radiometric calibration opportunities without requiring any special equipment, and is suitable for nano/microsatellites. This study applies lunar calibration to a multispectral sensor, Ocean Observation Camera (OOC), on board a microsatellite named Rapid International Scientific Experiment Satellite. Simulating the brightness of the Moon based on the RObotic Lunar Observatory and SELENE/Spectrum Profiler models, sensitivity degradation was proven to be negligible in any of the four spectral bands of the OOC with the sensor temperature correction. A bluing trend in the OOC’s sensor sensitivity was revealed, indicating a shorter observation wavelength shows larger irradiance. Comparing the top-of-atmosphere reflectance of Railroad Valley Playa with the Radiometric Calibration Network dataset revealed that the derived calibration parameter from the lunar calibration was valid for correcting the bluing trend in the visible range. Although the lunar and vicarious calibration parameters for the infrared band were unexpectedly inconsistent, lunar calibration could potentially contribute toward estimating the contaminated background radiance in the Earth observation images.
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Ageev, A. M., V. N. Bukov, and V. A. Shurman. "Algorithms for Managing the Redundancy of Onboard Equipment Complexes of Mobile Objects. Part 2. Paired Arbitration of Computers." Mekhatronika, Avtomatizatsiya, Upravlenie 23, no. 6 (June 3, 2022): 327–36. http://dx.doi.org/10.17587/mau.23.327-336.
Повний текст джерелаАнотація:
The article solves the problem of operative selection of the redundant onboard equipment complex components configuration of the suitable in the current operating conditionаs in the interests of ensuring high fault tolerance of the complex, as well as achieving other operational and technical characteristics. The basis of the redundancy management system of the complex consists of configuration supervisors — as program subjects according to the number of its competitive configurations of heterogeneous and nonuniform equipment worked out in advance. The choice of the preferred configuration is proposed to be carried out by performing multi-level arbitration, which includes two phases of paired arbitration of computers and paired arbitration of configuration. It is proposed to include the means of both types of arbitration in each configuration supervisor, which ensures its self-sufficiency when participating in a competitive selection. The second part of the article is devoted to the computer’s arbitration for the implementation of redundancy management functions. The approach is applicable to a computing environment with many comparable computing devices and contains 2 phases. In the first phase, a preliminary selection of a competing pair of computers — as applicants for the implementation of redundancy management functions in them is carried out. In the break between the phases, the pair computers implement the procedures for pair arbitration of configurations given in the first part of the article. In the second phase, the final choice of the α-computer is made, in which the supervisor who won the arbitration will be implemented. In order to achieve the maximum possible centralization of selection procedures and, as a consequence, the exclusion of "bottlenecks" in terms of reliability of places, additionally proposed: the organization of secure data exchange between computers based on distributed registry technology; the procedure of paired arbitration of computers, consisting in mutual cross-validation of dominant supervisors of a pre-allocated pair by comparing preference matrices, including information parcels of arbitration objects. A methodological example that demonstrates the features of the system functioning in the conditions of computers degradation is given. The proposed approach can be used to solve the problems of reconfiguration control of heterogeneous computing facilities of technical objects on-board equipment complexes.
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Ageev, A. M., V. N. Bukov та V. A. Shurman. "Algorithms for Managing the Redundancy of Onboard Equipment Complexes of Mobile Objects. Part 1. Paired Arbitration of Configurations". Mekhatronika, Avtomatizatsiya, Upravlenie 23, № 5 (6 травня 2022): 263–73. http://dx.doi.org/10.17587/mau.23.263-273.
Повний текст джерелаАнотація:
The article solves the task of an operational choice of the most suitable conditions for the functioning of the configuration of the components of a redundant onboard equipment in the interests at the same time as ensuring the high fault tolerance of the complex and the achievement of its other performance and technical characteristics. The basis of the redundancy management system is the program subjects in terms of the number of well-developed competitive configurations of heterogeneous and non-communicable equipment complex, called configuration supervisors. The choice of preferred configuration is proposed by performing a multi-level arbitration, which includes the comprising two phases of the pair arbitrator of the computers of the complex and the paired arbitration of configuration supervisors. To ensure the reliability of the competition in the conditions of possible collisions related to the unreliability of information parcels in a pair or with failures of arbitration modules, procedures have been introduced consisting in mutual cross-checking of information parcels between the supervisors of the pair. In case of conflicts when choosing a preference, mutual replacement of the inputs of the arbitration modules and re-evaluation of preferences is provided. The means of both types of arbitration are invited to include in each configuration supervisor, which ensures its self-sufficiency with participation in a competitive selection. The first part of the article is devoted to the paired arbitration of configuration supervisors that implements mutually crossanalysis of readiness indices and indicators of the functional efficiency of configurations combined into a pair. The brute force organized by any way allows you to identify the preferred configuration for subsequent implementation. Two options for paired arbitration of configurations of various complexity and efficiency with binary estimates of preferences (simplified and complete), as well as an arbitration option with triplex preference estimates are also proposed and analyzed. The results of the comparison of the arbitration options are presented, which is selected by the developer based on considerations of guaranteed presence or restrictions of the system design. A methodological example is given illustrating the possibilities of paired arbitration of configurations and its features of a practical nature.
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Kolychev, A. V., V. A. Kernozhitskiy, and A. A. Levikhin. "ABOUT MATERIALS OF THE THERMOEMISSION COOLING SYSTEM OF BLADES OF TURBINES OF GAS TURBINE CONVERTERS OF AEROSPACE CRAFTS OF RADIO-ELECTRONIC REMOTE SENSING OF THE EARTH." Issues of radio electronics, no. 7 (July 20, 2018): 89–95. http://dx.doi.org/10.21778/2218-5453-2018-7-89-95.
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Rated estimates of effect of application of the Thermal electron emission Way of Cooling (TWC) of blades of turbines (BT) of the gas turbine converters (GTC) of the Space Aircraft (SA) developed in in D. F. Ustinov Baltic State Technical University «VOENMEH» are given in the present article. Relevance of development of TWC is confirmed by the fact that now in the Russian Federation development of the SA platform with the energy basis at the heart of which the principle of gas turbine transformation is conducted. However, because of low reliability of its basic elements - blades of turbines in operating conditions, it is necessary to reduce temperature in installation that reduces efficiency and increases the weight and dimensions of SA in general. It means that taking into account opportunities of modern means of removal, opportunities for equipment of SA of the radio-electronic equipment are reduced and characteristics of SA with radio equipment in general decrease. Improvement of these characteristics requires increase of reliability of blades of turbines and increase on this basis of temperature of GTC, its efficiency with simultaneous decrease in weight and dimensions. But in this case it is supposed that turbine blades will be made of the ceramic materials functioning in the environment of the inert gases heated from onboard source of heat energy. One of problems at the same time is emergence of temperature gradients, tension and deformations that can lead to emergence of cracks. However, if to execute ceramic blades from metalsimilar connections (borida, carbides, alloys of borid and carbides) using TWC, then opportunity essential (more, than twice) decrease in both TB temperature, and temperature differences, and tension in TB design appears. In article it is also shown that decrease in temperature stresses in design of hot elements at equivalent heat load is reached due to fundamental properties of thermionic emission, namely thanks to dependence of intensity of thermionic emission and electronic cooling on temperature.
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Zhurkin, I. G., L. N. Chaban, and P. Yu Orlov. "Structurally topological algorithm for star recognition and near-Earth space’ object detection." Computer Optics 44, no. 3 (June 2020): 375–84. http://dx.doi.org/10.18287/2412-6179-co-597.
Повний текст джерелаАнотація:
When solving a variety of celestial navigation tasks there is a problem of determining parameters of spacecraft motion and onboard primary payload orientation based on the coordinates of registered star images. Furthermore, unwanted objects, like active satellites, natural and artificial space debris, that reduce the probability of correct recognition may get into the field of view of a satellite sensor. This prompts the necessity to filter out such interference from the star field images. However, if the objects under recognition are bodies located in near-Earth space, in this case, the star images themselves will act as interferences. In addition, since the detection and cataloging of these objects from the Earth’s surface is complicated by their small size, the atmospheric effects, as well as other technical difficulties, it is worthwhile to use the existing equipment onboard spacecrafts to solve this task. The existing recognition algorithms for star groups, as well as their classification, are presented in this paper. Moreover, a structurally topological approach for identifying groups of stars based on the properties of enveloping polygons used in constructing topological star patterns is proposed. Specific features in the construction of topological configurations on the analyzed set of points, as well as the principles of dynamic space object detection within their limits are described. Results of the numerical experiments performed using the developed algorithm on the star field maps and model scenes are presented.
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Nikitina, Valentina N., G. G. Lyashko, and N. I. Kalinina. "ANALYSIS OF THE STATE OF THE CURRENT ELECTROMAGNETIC SAFETY FOR CREWS OF THE ICEBREAKING FLEET VESSEL." Hygiene and sanitation 97, no. 12 (December 15, 2018): 1210–14. http://dx.doi.org/10.18821/0016-9900-2018-97-12-1210-1214.
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Introduction. The article presents results of a study on the hygienic evaluation of the impact of levels of electromagnetic fields (EMF) from electrical equipment, communications and navigational aids on modern automated ice-breaking vessels to the electromagnetic safety of the crew. Material and methods. The instrumental measurement of EMF levels from power equipment, electronic equipment, computers, were conducted in places of a permanent and temporary stay of the crew watches in parked icebreakers in the port and during sea trials. The assessment of the levels of electromagnetic radiation from the antennas of radio relay stations (radar) was conducted using the forecasting parameters of the EMF. Results. Onboard computers, marine electrical, communications and radar transmitters do not create electromagnetic fields exceeding the RC in crew workplaces of ship premises. Levels of EMF SHF range generated by RADAR antennas on the open deck, also do not exceed RC. Electromagnetic fields exceeding the RC are registered at work communications transmitters VHF, MF/HF on the decks of the installation of antennas transmitting devices. Discussion. There is a relevant matter of the protection of the crew from the EMF generated by the antennas of modern radars. Evaluation of the EMF RADAR intensity is only possible on the basis of data on forecasting levels of the electromagnetic radiation. To protect the crew from the EMF generated by antennas means the marine radio and RADAR on open decks should implement measures to limit exposure time to install warning signs and placards. Conclusions. There is required the improvement of normative-methodical documents in the field of the protection of the crew from the EMF. You must create a measurement technique for recording the intensity of electromagnetic radiation from the radar. Research data can be used for the development of science-based sanitary-epidemiological requirements for electromagnetic safety of the crew.
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Burlaka, Serhiy, and Svitlana Kravets. "DIAGNOSIS OF FUEL EQUIPMENT OF DIESEL ENGINE BY REMOVING VYBRO INDICATORS OF FUEL SUPPLY." ENGINEERING, ENERGY, TRANSPORT AIC, no. 3(114) (September 28, 2021): 113–23. http://dx.doi.org/10.37128/2520-6168-2021-3-13.
Повний текст джерелаАнотація:
Modern cars are increasingly equipped with control and diagnostic equipment. These methods are used to optimize the working process in the engine, improve traffic safety and simplify operation and maintenance. You can adjust the chip to your liking, adjust the "performance" of the engine, because comfortable driving conditions give us a lot of pleasure. The current control of technical conditions is carried out by the onboard system of self-diagnostics, which is an integral part of the controller. Problems that occur are signaled visually and stored in electronic memory. The full list of actual settings of codes of self-diagnostics and parameters of working process is carried out on HUNDRED with automobile indicators of brand. The problem is determined only by connecting a tester or scanner to a special diagnostic connector available in the car. However, there are often complaints about objective and comprehensive examinations. Misdiagnosis of "standards" with obvious signs of external problems is often given for many reasons. First of all, the use of information is limited electrical signals. In fact, the state of the circuit of sensors and actuators of engine automation is determined. Degradation of complex structures is usually based on the "domino principle": one local problem leads to another, another to a third, etc., which leads to the complete failure of the whole device. Problems with electricity may not be the cause but the consequences of other problems, including non-electrical causes. For example, the "ringing" of the piston fingers may indicate early inflammation and wear of the relevant components. The instability of the spark discharge in the spark plug may be the result of decompression of the working volume of the cylinder or improper preparation of the working mixture. The problem of the intake manifold or contamination of the fuel injector is usually recognized by the self-diagnostic system as a fault of the lambda detector. The list of such ambiguities can be expanded. When it is necessary to "restore" the accident of "decent age", branded diagnostic equipment may be useless.
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Heirich, Oliver, Benjamin Siebler, and Erik Hedberg. "Study of Train-Side Passive Magnetic Measurements with Applications to Train Localization." Journal of Sensors 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/8073982.
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Passive magnetic sensors measure the magnetic field density in three axes and are often integrated on a single chip. These low-cost sensors are widely used in car navigation as well as in battery powered navigation equipment such as smartphones as part of an electronic compass. We focus on a train localization application with multiple, exclusively onboard sensors and a track map. This approach is considered as a base technology for future railway applications such as collision avoidance systems or autonomous train driving. In this paper, we address the following question: how beneficial are passive magnetic measurements for train localization? We present and analyze measurements of two different magnetometers recorded on a regional train at regular passenger service. We show promising correlations of the measurements with the track positions and the traveled switch way. The processed data reveals that the railway environment has repeatable, location-dependent magnetic signatures. This is considered as a novel approach to train localization, as the use of these magnetic signals at first view is not obvious. The proposed methods based on passive magnetic measurements show a high potential to be integrated in new and existing train localization approaches.
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Camara, Carmen, Honorio Martín, Pedro Peris-Lopez, and Muawya Aldalaien. "Design and Analysis of a True Random Number Generator Based on GSR Signals for Body Sensor Networks." Sensors 19, no. 9 (April 30, 2019): 2033. http://dx.doi.org/10.3390/s19092033.
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Today, medical equipment or general-purpose devices such as smart-watches or smart-textiles can acquire a person’s vital signs. Regardless of the type of device and its purpose, they are all equipped with one or more sensors and often have wireless connectivity. Due to the transmission of sensitive data through the insecure radio channel and the need to ensure exclusive access to authorised entities, security mechanisms and cryptographic primitives must be incorporated onboard these devices. Random number generators are one such necessary cryptographic primitive. Motivated by this, we propose a True Random Number Generator (TRNG) that makes use of the GSR signal measured by a sensor on the body. After an exhaustive analysis of both the entropy source and the randomness of the output, we can conclude that the output generated by the proposed TRNG behaves as that produced by a random variable. Besides, and in comparison with the previous proposals, the performance offered is much higher than that of the earlier works.
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Leuchter, Jan, Lukas Hon, Radim Bloudicek, Teodor Balaz, and Erik Blasch. "The Study of Aviation Safe Incapacitating Device Based on LED Technology with a Smart-Illumination Sensor Unit." Sensors 21, no. 1 (December 25, 2020): 81. http://dx.doi.org/10.3390/s21010081.
Повний текст джерелаАнотація:
This paper deals with a design and implementation of optical defensive device for protection of aviation personnel. The design is built on the basic characteristics of human eyesight, illumination sensing of the environment, and microcontroller implementation for adaptation over sensed power, flash duration, and person distance. The aviation safe LED-based optical dazzler equipment (ASLODE) utilizes light emitting diode (LED) technology implemented with constant current regulators to control several modes of effects based on situational sensing. The temporarily incapacitating device can be extended by means of real-time illumination sensing to improve power efficiency and reach the highest level of safety. The smart pulse sets the flashing frequency from 8Hz for high-level light intensities and up to 20 Hz in low-level lighting conditions. Experimental results demonstrate the effectiveness of the ASLODE device over numerous experiments with controlled onboard aircraft scenarios that adapt the energy, flash rate, and processing to the sensed environmental illumination to meet aviation hygienic standards for people without eyesight defects.
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Yamazumi, Mitsuhiro, and Mitsushige Oda. "Tether Based Locomotion for Astronaut Support Robot Introduction of Robot Experiment on JEM." Journal of Robotics and Mechatronics 25, no. 2 (April 20, 2013): 306–15. http://dx.doi.org/10.20965/jrm.2013.p0306.
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An astronaut support robot called Astrobot will conduct tasks to reduce workloads of astronauts and risks of hazardous incidents that include astronauts. To realize Astrobot, new technologies must be developed such as robot locomotion capability to move robot’s location so that it arrives at required workplace and returns to its storage position. We are proposing a new type of robot locomotion method that uses tethers. JAXA is conducting experiments called Robot Experiment on Japanese Experiment Module or REX-J, to evaluate the usefulness of these new technologies. This paper discusses REX-J’s tether based locomotion control. This proposed tether locomotion control is defined as an under-actuated cable driven parallel manipulator. This system is difficult to control because tethers easily become slack in microgravity environment in orbit, which instantly changes their state. To cope with this problem, model-based control method using statics analysis is proposed as slackless control in microgravity environment. The proposed sequential tether length and tension control were tested using a breadboard model. REX-J onboard equipment was transported to the ISS/JEMin July 2012 and many experiments are now being conducted.
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Altukhov, A. A. "Radio-Electronic Modules and Radiation Monitoring Systems based on Diamond Detectors." Nano- i Mikrosistemnaya Tehnika 23, no. 5 (October 22, 2021): 266–76. http://dx.doi.org/10.17587/nmst.23.266-276.
Повний текст джерелаАнотація:
An overview of the current state and promising areas of application of semiconductor diamond detectors for creating radio-electronic monitoring systems for ionizing studies based on them is given. The main attention is paid to the creation of multifunctional space radiation monitoring systems that combine a set of diamond detectors and hardware and software tools that provide diagnostics of dose and spectrometric characteristics of various types of radiation. The data on the developed and manufactured samples of blocks and on-board control systems for cosmic and ionizing radiation are presented. The overview shows that diamond ionizing radiation detectors (IRD) are actively used in the creation of radio-electronic devices and monitoring systems for ionizing and cosmic radiation. The use of diamond IRD in combination with the developed design and technological solutions, hardware and software principles for the construction of such devices make it possible to create samples of on-board onboard avionics for separate measurement of the parameters of cosmic radiation and neutron fluxes, gamma radiation, characterized by small dimensions, high speed, hardness to radiation, mechanical and temperature influences. Multifunctional systems for ionizing radiation detection based on diamond detectors use the accumulated experience of successful development and application of discrete diamond IRD allowed us to start creating multifunctional modules and radiation monitoring systems (RMS) based on them. Theыыыыыы creation of such devices allows us to practically demonstrate the traditional advantages of discrete DIRD (high speed, the highest radiation hardness, high resistance to mechanical and thermal influences) in on-board equipment with smaller mass dimensions. The main structural and technological solutions that ensure the creation and effective functioning of RMS based on diamond IRD are the following: (1) separation the IR flow into energy sub-bands; (2) the use of software and hardware processing of data received from the IRD; (3) using a multi-detector system. Further development of research and development in these areas, in addition to solving the target tasks of radio-electronic instrumentation, will stimulate technological progress in various areas of solid-state electronics, including materials science and physics of wide-band semiconductors, the development of an experimental and technological base for the synthesis of diamond bulk crystals and multilayer structures, the creation of new technologies for ion-plasma processing of semiconductors, and a number of others.
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Mohamed-Seghir, Mostefa, Krzysztof Kula, and Abdellah Kouzou. "Artificial Intelligence-Based Methods for Decision Support to Avoid Collisions at Sea." Electronics 10, no. 19 (September 28, 2021): 2360. http://dx.doi.org/10.3390/electronics10192360.
Повний текст джерелаАнотація:
Ship collisions cause major losses in terms of property, equipment, and human lives. Therefore, more investigations should be focused on this problem, which mainly results from human error during ship control. Indeed, to reduce human error and considerably improve the safe traffic of ships, an intelligent tool based on fuzzy set theory is proposed in this paper that helps navigators make fast and competent decisions in eventual collision situations. Moreover, as a result of selecting the shortest collision avoidance trajectory, our tool minimizes energy consumption. The main aim of this paper was the development of a decision-support system based on an artificial intelligence technique for safe ship trajectory determination in collision situations. The ship’s trajectory optimization is ensured by multistage decision making in collision situations in a fuzzy environment. Furthermore, the navigator’s subjective evaluation in decision making is taken into account in the process model and is included in the modified membership function of constraints. A comparative analysis of two methods, i.e., a method based on neural networks and a method based on the evolutionary algorithm, is presented. The proposed technique is a promising solution for use in real time in onboard decision-support systems. It demonstrated a high accuracy in finding the optimal collision avoidance trajectory, thus ensuring the safety of the crew, property, and equipment, while minimizing energy consumption.
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Indriyanto, Toto, and Hedi Hartalita. "Affordable and Reliable Avionics Architecture Design for Advanced Regional Turboprop Aircraft." Applied Mechanics and Materials 842 (June 2016): 233–40. http://dx.doi.org/10.4028/www.scientific.net/amm.842.233.
Повний текст джерелаАнотація:
Integrated avionics architectures offer advantages such as higher flexibility, reliability, simplicity, future upgradeability and weight saving over previous federated designs. Successful implementations of integrated modular avionics (IMA) are onboard Boeing B777, B787, Airbus A380 and A350. These applications often result in development and maintenance cost not suitable for regional and general aviation aircraft. One popular approach to overcome this problem is by using integrated flight deck (IFD) supplied by avionics manufacturers such as Garmin or Honeywell. These manufacturers often optimize IFDs for applications in developed countries. For example, with the development and widespread use of satellite-based global positioning system (GPS) in the US, Canada and Europe, some terrestrial navigation equipment (e.g. ADF and DME) are no longer included in the standard IFD packages offered for commercial aviation. However, many areas in the rest of the world still use and rely largely on the availability of the ADF, DME, etc. Aircraft flying in these areas need to comply with the local requirements for terrestrial navigation systems already deployed. In this paper a study on the implementation of additional avionics equipment on Garmin G1000 for advanced regional turboprop aircraft is presented. G1000 is an integrated avionics system that integrates many electronic components including navigation, communication, course, attitude, display, etc. It has been widely used in all kinds of civil aviation aircraft. In order to conform to local and modern requirements, ADF receiver, DME transceiver, traffic alerting system and weather radar need to be integrated. Preliminary reliability analysis using fault tree method is performed for the designs to ascertain their safety as set out in the requirements for advanced regional turboprop aircraft.
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Zatylkin, A. V., D. A. Goluschko, and E. V. Kozhukhov. "Knowledge representation model for intelligent power supply control system of special purpose control machines." Radio industry (Russia) 30, no. 1 (April 14, 2020): 37–46. http://dx.doi.org/10.21778/2413-9599-2020-30-1-37-46.
Повний текст джерелаАнотація:
The problem of automating the process of reconfiguring the power supply system of onboard radio-electronic equipment in special-purpose control machines in different operation modes is considered. It covers power supply from different power sources, both while parked and when moving by developing and introducing the intellectual management to the structure of an electric power supply system. The analysis of the existing devices used to provide mobile objects with electrical energy of a direct current is carried out. Their advantages and drawbacks are highlighted. The conclusion is drawn on the necessity of new product development – the P910 power supply control panel with an integrated intellectual power supply management system. The model of representation of knowledge of the intellectual management system offered by authors is based on the classic productional model specified regarding the mechanism of forming and creating the database and rule base structures. The process of synthesizing managing influences that are based on analysis of information that describes a system status of control machines’ power supply is formalized. The operation algorithm of the intellectual power supply management system is developed and the chart illustrating its work is provided. The 1887BE7T domestic microcontroller is offered for the implementation of the model.
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Chernyak, Mykola, and Roman Chornomorets. "Experimental studies of electrical noise in the aircraft control system." MECHANICS OF GYROSCOPIC SYSTEMS, no. 39 (May 20, 2020): 31–46. http://dx.doi.org/10.20535/0203-3771392020229073.
Повний текст джерелаАнотація:
Currently, the problem of reducing noise in electrical equipment is important, because a noise in the system affects its components and can cause unpredictable behavior of the electrical system. This is especially important onboard of unmanned aerial vehicle (UAV), where all components are located close to each other and their noise has a significant cross-effect. Conductors passing through a noisy environment can pick up a noise and direct it to another circuits, where it creates interference. Some examples of such noise problems are: degraded accuracy characteristics of microcontroller modules (Analog-to-Digital Converters (ADC), Phase-Locked Loops (PLL) and other) due to noise on supply and reference voltages, wrong acquisition of the digital signals and interference with global navigation satellite system (GNSS) or remote control system of UAV.
This article is dedicated to the research of the influence of electrical noise, which is formed by the components of the UAV control system (engines, electric motor controllers, microcontroller etc.), on the performance and noise protection of electronic components of the UAV control system.
After the research it was concluded that the main sources of elecrtrical noise in the UAV control system are: high currents, consumed by electronic speed controllers (with motors), high-speed toggling of clock signal of SPI / I2C communication, regulation by step-down voltage regulator and internal processes inside the microcontroller due to work of flight control firmware. The waveforms of generated noises, caused by each source was measured with oscilloscope and depicted in the article.