Готові списки джерел за темами / Diesel motor Mathematical models

Добірка наукової літератури з теми "Diesel motor Mathematical models"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Diesel motor Mathematical models"

1

Xiao, Nengqi, Ruiping Zhou, Xiang Xu, and Xichen Lin. "Study on Vibration of Marine Diesel-Electric Hybrid Propulsion System." Mathematical Problems in Engineering 2016 (2016): 1–9. http://dx.doi.org/10.1155/2016/8130246.

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Анотація:
This study analyzes the characteristics of hybrid propulsion shafting and builds mathematical models and vibration equations of shafting using the lumped parameter method. Main focus is on the asymmetric double diesel propulsion shafting operation process and the impact of the phase angle and motor excitation on torsional vibration of shafting. Model result is validated by testing results conducted on double diesel propulsion shafting bench. Mathematical model and model-building methods of shafting are correct.
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2

Kovbasenko, Serhii. "Possibilities of enhancing the environmental safety of diesel vehicles using alternative fuels." Journal of Mechanical Engineering and Transport 16, no. 2 (January 17, 2023): 51–57. http://dx.doi.org/10.31649/2413-4503-2022-16-2-51-57.

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Анотація:
Today, most motor fuels are made from non-renewable sources of petroleum origin. In connection with the environmental problems associated with the use of traditional motor fuels in motor vehicle engines, many countries are implementing strict requirements for the greening of motor vehicles.At the same time, vehicles with diesel engines are quite attractive in terms of consumption of alternative motor fuels. One of the ways to increase the environmental safety of vehicles with diesel engines is the complete or partial replacement of diesel fuel with alternative fuels. In this regard, research and development in the field of energy resource use in road transport has been significantly intensified, and new programs are being developed to expand the use of alternative fuels. The main focus of the researchers on improving environmental safety is the complete or partial replacement of diesel fuel with alternative fuels, which can be of petroleum or non-petroleum origin. Such fuels can be: liquefied petroleum gas, compressed natural gas and associated gases, diesel biofuel, alcohols and ethers, as well as hydrogen, etc.The article examines the problem of alternative types of fuel and the use of new energy sources in the search for more ecologically clean, cheap and less scarce fuel. To solve this problem, it is necessary to perform an analysis and determine the possibilities of increasing the environmental safety of motor vehicles with diesel engines when using different alternative fuels.The analysis carried out in the work showed that the considered fuels are promising with the proper organization of the work process of motor vehicle diesel engines. However, in a number of cases, for example, when using hydrogen, alcohols, it is necessary to significantly change the design of the engine, which requires significant costs. The use of alternative, more environmentally friendly motor fuels, such as compressed natural gas, diesel biofuel of vegetable or animal origin, etc., will allow to significantly expand the fuel base of motor vehicle diesels and does not require a significant change in their design.In further research, an important task is to develop a methodology for evaluating the use of alternative fuels, which will combine a complex of functional and mathematical models to determine the energy efficiency and environmental safety of vehicles with diesel engines when using alternative fuels both in their pure form and in the form of mixed fuels.
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3

Yusha, V. L., G. I. Chernov, I. D. Obukhov, O. G. Bessonov, V. V. Denisenko, A. A. Goncharenko, and V. B. Shipov. "Multipurpose conversion of marine diesel engines when creating piston motor-compressor units." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 5, no. 3 (2021): 14–22. http://dx.doi.org/10.25206/2588-0373-2021-5-3-14-22.

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Анотація:
This paper present an assessment of the energy efficiency of various combinations of piston stages of an internal combustion engine, a compressor, and a Rankine engine as part of piston motor-compressor units based on modernized marine diesel engines. An eight-cylinder single-row diesel engine 8Ch23/30-1 is chosen as the object of research, the base of which is used as a single platform for creating powertechnology units for various purposes and power. The proposed variants for converting the original engine allow, with minimal costs for the development of design and manufacturing technology, to create gas engine compressor units with reduced fuel consumption and improved weight and size characteristics in comparison with the known mobile compressor stations driven by diesel internal combustion engines. In the paper, on the basis of the developed mathematical models of working processes, the possibility of joint operation of diesel cylinders with piston expanders of the Rankine cycle and one or more stages of a piston compressor is assessed. Various possible combinations of diesel cylinders, compressor cylinders and expander cylinders are considered, as well as the dependences of engine power and compressor performance depending on the number of compressor stages and the number of diesel power cylinders used.
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4

Zachepa, Iurii, Volodymyr Chenchevoi, Nataliia Zachepa, Olga Chencheva, and Serhii Serhiienko. "Study of a local source of autonomous power supply on the basis of a diesel generator." EUREKA: Physics and Engineering, no. 6 (November 29, 2022): 56–73. http://dx.doi.org/10.21303/2461-4262.2022.002566.

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Анотація:
A mathematical model of a local autonomous power supply source based on a diesel generator set is presented. The source of primary mechanical energy is a diesel internal combustion engine with an automatic speed controller, operating on the Polzunov–Watt’s principle. The electric energy converter is an asynchronous motor operating in a generator mode with capacitor self-excitation. The complete set of such devices is carried out from the available and normally working components of technological, electrical and transport equipment. They are formed by the personnel of the relevant enterprises in the period preceding the accident, during its development or at the end of its active phase. Therefore, mathematical models of subsystems of a diesel engine, an asynchronous machine operating in a generator mode, capacitive self-excitation and a number of typical electricity consumers are represented by separate structural blocks with functional relationships and connected according to the principle of subordinate regulation. This form of representation makes it possible to carry out large-scale studies of the qualitative and quantitative indicators of the operation of diesel generator sets with various types of both internal combustion engines and asynchronous machines. The coincidence of the results of numerical simulation and full-scale experiments allows to judge the adequacy of the proposed mathematical model of a local autonomous power supply source with a diesel generator. The presented model combines algorithmic simplicity and high computational precision and will make it possible to determine the criteria for the trouble-free operation of autonomous power supply sources to provide energy to consumers of different categories
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5

Kossov, E. E., V. V. Asabin, A. G. Silyuta, A. N. Zhuravlev, and L. E. Kossova. "Ways to solve the problem of converting diesel locomotives to gaseous fuel." VNIIZHT Scientific Journal 80, no. 4 (September 1, 2021): 191–200. http://dx.doi.org/10.21780/2223-9731-2021-80-4-191-200.

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Анотація:
The Government of the Russian Federation has set the task of expanding the field of application of gaseous fuels in the national economy. In accordance with this task, an agreement of June 17, 2016 was developed on cooperation between PJSC Gazprom, JSC Russian Railways, JSC Sinara Group, JSC Transmashholding in the use of natural gas as a motor fuel, which provides for the production of shunting gas locomotives and mainline diesel locomotives and gas turbine locomotives. This work is a continuation of the work begun in the 1990s to create, fine-tune and test diesel locomotives using natural gas as a motor fuel. The conversion of diesel locomotives to gaseous fuel can be carried out in two ways: creation of diesel locomotives with gas piston engines and the modernization of diesel locomotives of the existing fleet by converting the diesel engines of these locomotives to use the gas-diesel cycle. A comparison of these options is given and solutions are proposed that allow using gas-diesel cycle on diesel locomotives. Mathematical models for calculating the performance indicators of a gas-diesel generator plant in operating modes and separately for the fuel supply process are presented, their features and some calculation results are presented. The experimentally determined reasons for the impossibility of operation of the power plant in the gas-diesel cycle of a shunting diesel locomotive based on TEM18 below the fourth position of the driver's controller are theoretically substantiated. The minimum required structural changes to the standard fuel equipment are determined, which are necessary to ensure stable operation of a diesel locomotive on gaseous fuel. A comparative assessment of the efficiency of converting diesel locomotives to gaseous fuel is carried out and the cost of fuel consumed per hour of operation is determined, depending on the degree of fuel replacement with gas when the locomotive is operating in average operating modes.
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6

Polivyanchuk, A. "MATHEMATICAL MODELING OF INFLUENCE THE OPERATION MODE DIESEL ENGINE ON THE CONTENT OF PARTICULATE MATTER IN EXHAUST GASES." Municipal economy of cities 3, no. 156 (July 1, 2020): 62–68. http://dx.doi.org/10.33042/2522-1809-2020-3-156-62-68.

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Анотація:
The work is devoted to solving an urgent scientific and practical task – establishing mathematical models that describe the effect of operating modes of diesel engines on the content in the exhaust gases of a dangerous pollutant – particulate matter (PM). The purpose of the work was to create and study the accuracy and practical suitability of the calculation method estimating concentrations and emissions with exhaust gases PM by means of mathematical modeling of the influence on them of parameters that determine steady state and unsteady diesel operation modes. The studies were carried out on the basis of the motor stand of a 4ChN12/14 autotractor diesel equipped with a partial-flow system for diluting EG with air – MKT-2 microtunnels. Measurements mass and vol-ume concentrations – cpt (g/kg) and Cpt (g/mn3), mass – PTmass (g/h) and specific – PTp (g/kWh) PM emissions was carried out by the gravimetric method with errors of ± 3 .. 10% in accordance with the requirements of regulatory documents – ISO8178 standard, UNECE Rules R-49, R-96, etc. As parameters which determine the mode of opera-tion of the diesel engine, were considered: during the study steady-state modes – the number of revolutions of the engine crankshaft (n, min-1) and the load (L,%); in the study of unsteady modes – the parameters n and L and the rate of change over time – Δn/Δt and ΔL/Δt. A dependence has been established for indirectly determining the mass concentration of PM in the exhaust gases at steady and unsteady diesel operating modes, which are charac-terized by a duration of 10 ... 30 s and ranges of vari-ation of the parameters n, L, Δn/Δt and ΔL/Δt, given in di-mensionless form: 0.4 ... 0.8, 0.3 ... 1.0, -0.2 ... 0.2 and -0.35 ... 0.35, respectively. The deviation of the calculated and experimental data when using this dependence is ± 0.005-0.006 g/kg, which is comparable with the sensitivity limit of MKT-2. Keywords: diesel, exhaust gases, particulate matter, concentration, test mode, mathematical model, accuracy.
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7

Xiao, Nengqi, Xiang Xu, and Baojia Chen. "Research on Simulation and Experiment of Ship Complex Diesel-Electric Hybrid Propulsion System." Journal of Ship Research 64, no. 02 (June 1, 2020): 171–84. http://dx.doi.org/10.5957/jsr.2020.64.2.171.

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Анотація:
This article introduces the composition and 12 operating conditions of a four-engine two-propeller hybrid power system. Through the combination of gearbox clutch and disconnection, the propulsion system has four single-engine operation modes, two double-engine parallel operation modes, and six PTI operation modes. Because the propulsion system has a variety of operating conditions, each operating condition has a form of energy transfer. As a result, its energy management and control are more complicated. To study the energy management and control strategy of a diesel- electric hybrid propulsion system, this work mainly studies the simulation model and sub-models of a diesel-electric hybrid propulsion system. In this study, MATLAB/ SIMULINK software is used to build the diesel engine model, motor model, and ship engine system mathematical model. The test and analysis were carried out on the test bench of the diesel-electric hybrid power system. By comparing the theoretical value of the SIMULINK simulation model with the test value of the test bench system, the correctness of each sub-model modeling method is verified. On the one hand, research on the text lays a theoretical foundation for the subsequent implementation of the conventional energy management and control strategy based on state identification on the unified management and distribution of the diesel-electric hybrid power system. At the same time, energy management of the diesel-electric hybrid system is also carried out. Optimization research provides theoretical guidance.
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8

Pavlov, D. V., K. Yu Platonov, and R. N. Khmelev. "Mathematical modeling of the functioning process of a single-cylinder air-cooled diesel engine taking into account the consumption of crankcase gases." Izvestia MGTU MAMI 1, no. 3 (2020): 75–82. http://dx.doi.org/10.31992/2074-0530-2020-45-3-75-82.

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Анотація:
At present, the most effective method for studying internal combustion engines (ICE) is mathe-matical modeling and computational experiment. The use of a computational experiment can signif-icantly reduce material and time costs in the research, design and refinement of the internal combus-tion engine. At the same time, despite the high level of the applied mathematical models, there are practically no studies aimed at establishing the regularities of the influence of the state of the cylin-der-piston group (CPG) on the crankcase gas consumption and other indicators of engine operation at steady-state and transient modes. This article is devoted to solving an urgent problem associated with the development of a theoretical base that provides a comprehensive simulation of steady-state and transient modes of diesel engine operation, taking into account the consumption of crankcase gases. The article presents a mathematical model of a diesel engine based on thermal mechanics, which reflects the main features of the engine as a system that converts energy in time. The system of equations of the mathematical model is based on the laws of conservation of energy, mass, equa-tions of motion of solid links and includes differential equations for the rates of change in the tem-perature and density of the working fluid in the cylinder and in the crankcase of the internal com-bustion engine, the ideal gas equation of state, as well as differential equations for the change in the angular speed and angle of motor shaft rotation. The mathematical model is tested on the example of a small-sized single-cylinder diesel engine 1Ch9.5 / 8.0 with air cooling. This type of engine is widely used for small-scale mechanization in agriculture, generator sets, etc. The article presents the results of calculations of a number of engine operating modes in comparison with the results of field tests carried out at the test bench.
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9

Lebedevas, Sergejus, Saugirdas Pukalskas, and Vygintas Daukšys. "MATHEMATICAL MODELLING OF INDICATIVE PROCESS PARAMETERS OF DUAL-FUEL ENGINES WITH CONVENTIONAL FUEL INJECTION SYSTEM." Transport 35, no. 1 (March 16, 2020): 57–67. http://dx.doi.org/10.3846/transport.2020.12212.

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Анотація:
Modern engine research uses multi-dimensional Mathematical Models (MMs) that are applicable to multi-fuel engines. However, their use involves the availability of detailed technical data on the design and characteristics of the engine, which is not always possible. The use of a one-dimensional MM is more expedient for the prediction of engine parameters, but their application for this purpose has not yet been sufficiently investigated. This publication presents the results of numerical studies evaluating the application of a one-dimensional MM with bi-phase Vibe combustion laws for dual-fuel (DF) Diesel (D) and Natural Gas (NG) engine power parameters. The motor test results of a high-speed 4ČN79.5/95.5 Diesel Engine (DE) with a conventional fuel injection system were used as adequacy criteria. The engines were operated with D100 and DF D20/NG80, in high- (HLM), medium- (MLM), and low- (LLM) load modes, and the angle of Diesel-fuel Injection Timing (DIT) was changed from −1 to −13 °CA in the Before Top Dead Center (BTDC) range. Modelling of the single-phase Vibe combustion law has limited applicability for efficient use only in HLM (with an error of 7%). In the MLM and LLM regimes, owing to non-compliance with real bi-phasic combustion with a strongly extended NG diffusive second phase, the modelling error is 50%. Individual MM matching in MLM and LLM in a DF D20/NG80 experiment detected a burn time increase from between 45 and 50 °CA, to 110 and 200 °CA, respectively. Limited use of the one-dimensional MM in the evaluation of DF engine performance has been identified. When comparing a one-dimensional MM with experimental data, a bi-phase law of heat release characteristic should be considered for better coincidence. In addition, individual MM matching with an experiment on each engine load mode ensured acceptable accuracy in testing and optimising the parameters of the indicator process, including DIT.
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10

Kalinichenko, Antonina, Valerii Havrysh, and Vasyl Perebyynis. "Evaluation of Biogas Production and Usage Potential." Ecological Chemistry and Engineering S 23, no. 3 (September 1, 2016): 387–400. http://dx.doi.org/10.1515/eces-2016-0027.

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Анотація:
Abstract The aim of the research is the development of theoretical and methodical bases for determining the feasibility of plant raw materials growing for its further bioconversion into energy resources and technological materials to maximize profit from business activities. Monograph, statistics, modelling and abstract logical methods have been used during the research. Directions of biogas usage have been examined. Biogas yields from different crops have been analyzed. It has been determined that high methane yields can be provided from root crops, grain crops, and several green forage plants. So, forage beet and maize can provide more than 5,500 m3 of biogas per hectare. Attention is paid to the use of by-products of biogas plants, especially carbon dioxide. Carbon dioxide is an important commodity and can increase profitability of biogas plant operating. It can be used for different purposes (food industry, chemical industry, medicine, fumigation, etc). The most important parameters of the biogas upgrading technologies have been analyzed. If output of an upgrade module is more than 500 nm3/h, investment costs of different available technologies are almost equal. According to experts, it is economically feasible to use anaerobic digestion biogas systems to upgrade biomethane provided their performance is equivalent to 3,000 litres of diesel fuel per day. The economic and mathematical models have been suggested to determine the feasibility of growing plant materials to maximize the gross profit. The target function is the maximum gross income from biogas utilization. It has the following limitations: annual production of biogas, consumption of electricity, heat and motor fuels. The mathematical model takes into account both meeting own requirement and selling surplus energy resources and co-products including carbon dioxide. In case of diesel fuel substitution, an ignition dose of diesel fuels has been considered. The algorithm for making a decision on construction of a biogas plant has been offered.
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Більше джерел

Дисертації з теми "Diesel motor Mathematical models"

1

Chin, Chi-pang Henry, and 錢志鵬. "Receptor modelling of particulates pollution in Hong Kong by chemical mass balance." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1997. http://hub.hku.hk/bib/B31253696.

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2

Mazzetti, Caterina. "A mathematical model of the motor cortex." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/15002/.

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Анотація:
In this work we present a geometric model of motor cortex that generalizes an already existing model of visual cortex. The thesis opens by recalling the notions of fiber bundles, principal bundles, Lie groups and sub-Riemannian geometry. In particular, we enunciate Chow’s theorem which ensures that if the Hörmander condition holds, the space connectivity property is satisfied. Then we recall the visual cortex model proposed by Citti-Sarti, which describes the set of simple cells as a Lie group with sub-Riemannian metric. The original part of the thesis is the extension to the motor cortex. Based on neural data, collected by Georgopoulos, we study the set of motor cortical cells and we describe them as a principal bundle. The fiber contains the movement direction and shapes the hypercolumnar structure measured. Finally we determine the intrinsic coordinates of the motor cortex, studying the cellular response to the motor impulse.
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3

Vora, Kuntal A. "Cycles and weight effects on emissions and development of predictive emissions models for heavy duty trucks." Morgantown, W. Va. : [West Virginia University Libraries], 2006. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=4700.

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Анотація:
Thesis (M.S.)--West Virginia University, 2006.
Title from document title page. Document formatted into pages; contains xiii, 85 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 82-84).
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4

Zhang, Chunlei, and 张春雷. "Multiscale modeling of the flagellar motor of Escherichia coli." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2013. http://hdl.handle.net/10722/193497.

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Анотація:
The flagellar motor of Escherichia coli is a bidirectional rotary nano-motor, powered by a transmembrane influx of protons. The maximum speed of rotation is about 300 Hz. The motor rotates either counterclockwise (CCW) or clockwise (CW) and the rotation direction is controlled by a chemotactic protein, CheY-P. Despite extensive structural and functional studies, precise mechanisms regarding the torque generation and the directional switching processes remain unclear. In this work, a bottom-up strategy is proposed and followed to investigate this motor. This strategy, named as a multiscale modeling approach, integrates various publicly available experimental data and ‘state-of-the-art’ molecular modeling methods to build structural models for the two most important parts of the motor, the C ring and the stator. Starting from the primary sequences of the composition proteins of these two substructures, tertiary structures are predicted by means of comparative modeling or de novo prediction when the comparative modeling is not available. Quaternary structures of these proteins’s complexes are then predicted by data-driven protein-protein docking or multiscale molecular dynamics (MD) simulations. Finally, structural models of the C ring at CCW and CW rotational states are constructed by cryo-EM aided assembling methods (constraint search that is based on the multiscale modeling tools and under the constraint of the EM images). In the case of the stator, its composition proteins, MotA and MotB, are assembled by coarse-grained MD simulations. This is the first molecular model based atomistic details for the stator. A new molecular mechanism for rotational switching is proposed based on the structural models of the C ring and the stator. The two states of the C ring display significant differences in the interfaces among the self-assembled FliMs and the orientations of FliG C-terminal domain. Based on protein docking results, a binding site of CheY-P is identified on FliM which is close to the interfaces of FliMs for self-assembling. Thereby, I propose that the CheY-P binding interferes with the interactions between neighboring FliM proteins, and thus, induces ~65° rotation of the FliGc domain with respect to FliM. Subsequently, the interactions between the stator and FliGc domains are altered and the rotation direction is changed. Furthermore, a mechanism accounting for the directed rotation of the flagellar motor is proposed based on systematic MD studies on the dynamics of FliGc. It is found that the C-terminal subdomain of FliGc is capable of rotating by ~180° with respect to the N-terminal subdomain of FliGc. If this dynamics is considered in the framework of the whole C ring, the rotation of the C-terminal subdomain of FliGc exhibits an asymmetric feature. As a result, the C ring is decorated with asymmetric teeth on the outer periphery and hence similar with Feynman’s ratchet. The preference of the motor in CCW rotation or in CW rotation is then explained based on the Feynman’s ratchet model.
published_or_final_version
Chemistry
Doctoral
Doctor of Philosophy
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5

Knight, Peter Robin. "Artificial intelligence and mathematical models for intelligent management of aircraft data." Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/355717/.

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Анотація:
Increasingly, large volumes of aircraft data are being recorded in an effort to adapt aircraft maintenance procedures from being time-based towards condition-based techniques. This study uses techniques of artificial intelligence and develops mathematical models to analyse this data to enable improvements to be made in aircraft management, affordability, availability, airworthiness and performance. In addition, it highlights the need to assess the integrity of data before further analysis and presents the benefits of fusing all relevant data sources together. The research effort consists of three separate investigations that were undertaken and brought together in order to provide a unified set of methods aimed at providing a safe, reliable, effective and efficient overall procedure. The three investigations are: 1. The management of helicopter Health Usage Monitoring System (HUMS) Condition Indicators (CIs) and their analysis, using a number of techniques, including adaptive thresholds and clustering. These techniques were applied to millions of CI values from Chinook HUMS data. 2. The identification of fixed-wing turbojet engine performance degradation, using anomaly detection techniques, applied to thousands of in-service engine runs from Tornado aircraft. 3. The creation of models to identify unusual aircraft behaviour, such as uncommanded flight control movements. Two Chinook helicopter systems were modelled and the models were applied to over seven hundred in-service flights. In each case, the existing techniques were directed toward a condition-based maintenance approach, giving improved detection and earlier warning of faults.
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6

Na, Xiaoxiang. "Game theoretical modelling of a driver's interaction with active steering." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708392.

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7

Karam, Philippe Chucri. "Modeling passive and active mechanisms in motoneuron dendrites." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/13713.

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8

Juston, John M. "Theoretical and experimental study into the dynamics and control of a flexible beam with a DC-servo motor actuator." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/50029.

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Анотація:
Position and vibration control of a flexible beam is studied analytically and in the laboratory. Two different motor types are compared as actuators throughout the thesis: a standard voltage controlled motor and a torque controlled motor. The experimental beam is controlled with a dc-servo motor at its base and is instrumented with strain gages and a potentiometer. The control law is a form of linear, direct-output feedback. State estimators augment the control law to provide rate information that is not available from the instrumentation. Accurate modeling of the system’s inherent damping characteristics is achieved by analyzing experimental data. Gains were iterated yielding minimum-gain norm and minimum-sensitivity norm solutions to meet imposed eigenvalue placement constraints. Results for the two solutions and the two systems are compared and contrasted. Experimental verification of analytical results is hampered by unmodeled system non-linearities. Several attempts at bypassing these obstacles are shown. Finally, conclusions and recommendations are made.
Master of Science
incomplete_metadata
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9

Watanabe, Renato Naville. "Identificação de sistemas para o estudo de controle motor." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-27062016-162303/.

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Анотація:
Qualquer tarefa motora ativa se dá pela ativação de uma população de unidades motoras. Porém, devido a diversas dificuldades, tanto técnicas quanto éticas, não é possível medir a entrada sináptica dos motoneurônios em humanos. Por essas razões, o uso de modelos computacionais realistas de um núcleo de motoneurônios e as suas respectivas fibras musculares tem um importante papel no estudo do controle humano dos músculos. Entretanto, tais modelos são complexos e uma análise matemática é difícil. Neste texto é apresentada uma abordagem baseada em identificação de sistemas de um modelo realista de um núcleo de unidades motoras, com o objetivo de obter um modelo mais simples capaz de representar a transdução das entradas do núcleo de unidades motoras na força do músculo associado ao núcleo. A identificação de sistemas foi baseada em um algoritmo de mínimos quadrados ortogonal para achar um modelo NARMAX, sendo que a entrada considerada foi a condutância sináptica excitatória dendrítica total dos motoneurônios e a saída foi a força dos músculos produzida pelo núcleo de unidades motoras. O modelo identificado reproduziu o comportamento médio da saída do modelo computacional realista, mesmo para pares de sinal de entrada-saída não usados durante o processo de identificação do modelo, como sinais de força muscular modulados senoidalmente. Funções de resposta em frequência generalizada do núcleo de motoneurônios foram obtidas do modelo NARMAX, e levaram a que se inferisse que oscilações corticais na banda-beta (20 Hz) podem influenciar no controle da geração de força pela medula espinhal, comportamento do núcleo de motoneurônios até então desconhecido.
Any active motor task is accomplished by the activation of a motor unit population. However, due to many ethical and technical difficulties the synaptic input to the motoneurons cannot be measured in humans. For these reasons realistic computational models of a motoneuron nucleus and the innervated muscle fibers have an important role in the study of the human control of muscles. However such models are complex and their mathematical analysis is difficult. In this text a system identification approach of a realistic motor unit nucleus model is presented with the objective of obtaining a simpler model capable of representing the transduction of the motor unit nucleus inputs into the muscle force signal associated to that nucleus. The system identification was based on an orthogonal least squares algorithm to find a NARMAX model, the input being the net dendritic excitatory synaptic conductance of the motoneurons and the output being the muscle force signal produced by the motor unit nucleus. The identified model output reproduced the mean behavior of the output from the realistic computational model even for input-output signal pairs not used during the identification process, such as sinusoidally modulated output muscle force signals. Generalized frequency response functions of the motoneuron nucleus were obtained from the identified NARMAX model, and led to an inference that cortical oscillations in the beta band (20 Hz) can affect force control by the spinal cord, an unknown motoneuron nucleus behavior until now.
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10

Lindgren, Magnus. "Engine exhaust gas emissions from non-road mobile machinery : effects of transient load conditions /." Uppsala : Dept. of Biometry and Engineering, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/a481.pdf.

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Книги з теми "Diesel motor Mathematical models"

1

Mendis, Kolita. Finite element crash models of motor vehicles. McLean, Va: Federal Highway Administration, Turner-Fairbank Highway Research Center, 1995.

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Shadmehr, Reza. The computational neurobiology of reaching and pointing: A foundation for motor learning. Cambridge, MA: MIT Press, 2004.

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Motor vehicle dynamics: Modeling and simulation. Singapore: World Scientific, 1997.

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4

Engineers, Society of Automotive, ed. Motor vehicle accident reconstruction: Review and update. Warrendale, PA: Society of Automotive Engineers, 1989.

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Fijałkowski, Bogdan. Modele matematyczne wybranych lotniczych i motoryzacyjnych mechano-elektro-termicznych dyskretnych nadsystemów dynamicznych. Kraków: Politechnika Krakowska im. Tadeusza Kościuszki, 1987.

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International Federation of Automobile Engineers' and Technicians' Associations. International Congress. Total vehicle dynamics: Technical papers : XXIV FISITA Congress, 7-11 June, 1992, London : automotive technology serving society. London: published by Mechanical Engineering Publications Ltd. for the Institution of Mechanical Engineers, 1992.

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7

Office, General Accounting. Air pollution: EPA could take additional steps to help maximize the benefits from the 2007 diesel emissions standards. Washington, D.C: United States, General Accounting Office, 2004.

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1949-, Dhareshwar Ashok M., and Lima, Paulo Roberto S. Rezende, 1944-, eds. Vehicle speeds and operating costs: Models for road planning and management. Baltimore: Published for the World Bank [by] Johns Hopkins University Press, 1987.

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9

Swift, Adrian. An analysis of coastdown data. Palmerston North, N.Z: Dept. of Mathematics and Statistics, Massey University, 1989.

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Zmysłowski, Wojciech. Algorytmy formowania sygnału sterującego w sieciach motoneuronów alfa, komórek Renshawa, interneuronów lalN i neuronów C₃-C₄ PN. Warszawa: Polska Akademia Nauk, Instytut Biocybernetyki i Inżynierii Biomedycznej, 1989.

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Частини книг з теми "Diesel motor Mathematical models"

1

Mechri, Walid, Hai-Canh Vu, Phuc Do, Timothee Klingelschmidt, Flavien Peysson, and Didier Theilliol. "A Study on Health Diagnosis and Prognosis of an Industrial Diesel Motor: Hidden Markov Models and Particle Filter Approach." In Advances in Intelligent Systems and Computing, 380–89. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-64474-5_32.

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2

Knuesel, Jeremie, Jean-Marie Cabelguen, and Auke Ijspeert. "Decoding the Mechanisms of Gait Generation and Gait Transition in the Salamander Using Robots and Mathematical Models." In Motor Control, 417–46. Oxford University Press, 2010. http://dx.doi.org/10.1093/acprof:oso/9780195395273.003.0018.

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3

Yousri, Dalia, Dalia Allam, and Magdy Eteiba. "Parameters Identification of Fractional Order Permanent Magnet Synchronous Motor Models Using Chaotic Meta-Heuristic Algorithms." In Mathematical Techniques of Fractional Order Systems, 529–58. Elsevier, 2018. http://dx.doi.org/10.1016/b978-0-12-813592-1.00018-0.

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Burlaka, Serhiy, and Natalia Telekalo. "MODERNIZATION OF THE POWER SUPPLY SYSTEM OF A DIESEL POWER PLANT." In Modernization of research area: national prospects and European practices. Publishing House “Baltija Publishing”, 2022. http://dx.doi.org/10.30525/978-9934-26-221-0-10.

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The research is devoted to solving important tasks of interdisciplinary research work on the topic: «Development of scientific and technical support for energy autonomy of the agro-industrial complex based on environmentally efficient use of agrobiomass for biofuel production», state registration number 0122U000844, implementation of which is planned for 2022–2024 at the expense of the state budget of Ukraine.This paper considers topical scientific and technical issues of improving the efficiency of machine units when working with mixed fuels. One of the most promising alternative fuels is biofuels, the use of which will reduce the consumption of petroleum fuels and reduce corrosion emissions into the atmosphere.A review of the literature sources of modern power systems and equipment using biofuels and their mixtures, the impact of fuel mixtures on engine operation and analysis of mathematical models for calculation by the methods of Lyshevsky O. S. and clarification of prof. Razleytseva M. F.An improved diesel engine power system has been developed, which electronically controls the composition of the dosed fuel mixture, a mixer for mixed fuel supply to the machine unit has been developed, the operation of the machine-tractor unit (MAT) model has been confirmed, and AIT physical and mathematical models have been developed. A method for calculating the continuity of the working fluid flow in the characteristic areas of modern power supply systems has been developed. The geometric parameters of the Savonius rotor of the developed mixer are calculated and optimized to the most appropriate design solution.The aim of the study is to increase the efficiency of biofuel use in diesel power plants by improving the fuel system of the fuel mixer.Research methods include theoretical and experimental studies of the process of obtaining and supplying biofuels using a mixing device, comparative studies of diesel power plant in bench conditions and operating conditions on this fuel using modern technical measuring instruments and methods of processing these data on personal computers using standard application packages Compass, FlowVision.
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Naoui, Mohamed, Flah Aymen, Ben Hamed Mouna, and Lassaad Sbita. "Brushless Motor and Wireless Recharge System for Electric Vehicle Design Modeling and Control." In Advances in Systems Analysis, Software Engineering, and High Performance Computing, 338–62. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-5788-4.ch014.

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This chapter deals with the problem of energy storage inside an electric vehicle. The main source of energy is based on a wireless system. This recharge tool regroups inside several components as the storage system, which consists of an ensemble of batteries and serving as the main power source, a special electronic converter that is based on the buck-boost principle and a coil receiver placed undo the vehicle. From the other side, one or more than coil transmitters are placed on the road, where the vehicle is. Modeling all of these components and expressing their mathematical models seems interesting for defining the possible control method that can guarantee a high autonomy when the vehicle is moving. So, taking into account if the care is driving or stopped, this recharge system is studied for verifying the effectiveness of this recharge system and showing the relationship between the vehicle situation and the quantity of received power. Using the platform Matlab/Simulink the results were shown and discussed.
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Ciulin, Dan. "About Gravitational (Inertial) Motors." In Advances in Business Information Systems and Analytics, 90–126. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1680-4.ch005.

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A gravitational motor interact with the locally gravitational field in order to produce a linear and/or rotational thrust able to move in space a given vehicle. The big advantages of such a motor are the facts that it can be used for nearly any kind of vehicle, even in free space, and may be placed inside the vehicle as the necessary interactions with the environment are realized through gravitational fields but not by direct mechanical interaction as for actual motors used for vehicles. Generally, in mechanics a physical motor may be considered as a ‘transducer' between some input (equivalent) energy existing on a vehicle and the output (equivalent) obtained movement of this vehicle. For space treks, such a motor must be able to ensure the take-off and/or landing of a space vehicle on any given planet and carry the entire load corresponding to this vehicle including also the necessary energy sources and eventually a human crew. By analogy with the Levitron toy the atomic particles, and the maglev such motor may be built. The paper presents some ideas and mathematical models that may help to build such a gravitational motor. It starts by presenting the energy based differential equations that have as solution analytic complex exponential functions, elliptic and ultra-elliptic functions adding also a physical interpretation of their coefficients. Forces and torques in mechanic and electro mechanic are presented and also methods to obtain such forces using only torques. Based on the modified Euler equations of a gyroscope with an added magnet like for the Levitron toy, an electro-mechanical gravitational motor may be built and a mathematical model for the gravitational waves is also deduced. Maybe, by using this kind of waves, a permanent contact between an interplanetary ship and the earth can be kept. Another kind of inertial motor may be based on the direct transfer of the energy of acoustical and/or ultra-acoustical waves that represents the desired ‘inertia' of a vehicle to this vehicle. This kind of transfer may be realized using convenient acoustical and/or ultra-acoustical 3-D sources. This last method has the advantage that uses no mechanical component in movement and then may lead to a better reliability. Associated with a good and convenient technology that may be developed on the presented bases, all these tools are of most strategic importance. Applications may be found in interplanetary telecommunications and treks but also for a new, more sure and versatile, telecommunications systems and terrestrial vehicles. The presented tools may be used for mathematically modeling the fields and ensure also a more comprehensive understanding.
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Leigh, R. John, and David S. Zee. "Eye-Head Movements." In The Neurology of Eye Movements, 474–519. Oxford University Press, 2015. http://dx.doi.org/10.1093/med/9780199969289.003.0008.

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This chapter reviews the relationship between ocular motor and cephalomotor systems, summarizing mechanical properties of head and neck tissues, head stability, and the roles of the cervico-ocular reflex (COR), vestibulo-collic reflex (VCR), and cervico-collic reflex. Visual consequences of head translation, and motion parallax, are discussed. Behavioral properties of eye-head saccades and smooth eye-head tracking are summarized along with their interactions with the vestibulo-ocular reflex (VOR). The neural substrate for rapid and smooth eye-head movements is discussed including the nucleus reticularis gigantocellularis, superior colliculus, cerebellar vermis and fastigial nucleus. Mathematical models for eye-head behavior are presented. Clinical and laboratory evaluation of eye-head movements are outlined, with geometric corrections required during measurement of eye and head movements. Discussion of the pathophysiology of abnormal eye-head movements includes vestibular hypofunction, progressive supranuclear palsy, spasmodic torticollis (cervical dystonia), spasmus nutans, epilepsy, ocular motor apraxia, and abnormal smooth eye-head tracking in parkinsonian syndromes and cerebellar disorders.
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8

Trad, Antoine. "Business Transformation and Enterprise Architecture Projects." In Handbook of Research on Applying Emerging Technologies Across Multiple Disciplines, 79–121. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-8476-7.ch005.

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This chapter proposes the fundaments of artificial intelligence (AI) and is the basics of the author's framework that is specialized in transformation initiatives. The proposed natural language programming (NLP) concept is supported by the author's applied holistic mathematical model (AHMM) for AI (AHMM4AI) that is the result of research on AI, business, financial, and organizational transformations using applied mathematical models. This research is based on years of cross-functional research initiatives and on an authentic and proprietary mixed research method that is supported by an authentical version of an AI search tree, which is combined with an internal heuristics motor, which is applied to requirements NLP strategy. The proposed AHMM4AI-based NLP fundamentally functions like the human empiric decision-making process that can be compared to the behaviour-driven development methods, which are optimal for complex software engineering.
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Baccari, Silvio, Giulio Cammeo, Christian Dufour, Luigi Iannelli, Vincenzo Mungiguerra, Mario Porzio, Gabriella Reale, and Francesco Vasca. "Real-Time Hardware-in-the-Loop in Railway." In Railway Safety, Reliability, and Security, 221–48. IGI Global, 2012. http://dx.doi.org/10.4018/978-1-4666-1643-1.ch010.

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The increasing complexity of modern ground vehicles is making crucial the role of control for improving energetic efficiency, comfort and performance. At the same time, the control software must be frequently updated in order to let the vehicle respond safely and efficiently within more sophisticated environments and to optimize the operations when new vehicle components are integrated. In this framework real-time hardware-in-the-loop simulations represent a fundamental tool for supporting the verification and validation processes of the control software and hardware. In this chapter a railway case study will be presented. The mathematical models of the most relevant electromechanical components of the vehicle powertrain are presented: the pantograph connected to an ideal overhead line with continuous voltage; the electrical components of a pre-charge circuit, the line filter and the braking chopper; the three-phase voltage source inverter and the induction motor; and, finally, the mechanical transmission system, including its interactions with the rail. Then the issues related to the real-time simulation of the locomotive components models are discussed, concentrating on challenges related to the stiff nature of the dynamic equations and on their numerical integration by combining field programmable gate array (FPGA) and central processing unit (CPU) boards. The usefulness of the real-time hardware-in-the-loop simulations for the analysis of railway control software will be demonstrated by considering the powertrains of two real metropolitan trains under complex scenarios, i.e., stator winding disconnection of the induction motor, pantograph missing contact, wheel-rail slipping phenomenon.
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Тези доповідей конференцій з теми "Diesel motor Mathematical models"

1

Alcázar-García, Désirée, and Luis Romeral Martínez. "Energy Consumption and Total Vehicle Efficiency Calculation Procedure for Electric Vehicles (EV, HEV and PHEV)." In ASME 2018 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/detc2018-85182.

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An important question regarding vehicles design optimization and environmental care are energy management strategy and efficiency determination. Automotive brands work with a wide range of technologies and electrified mobility is considered to be one of the solutions to the growing environmental question. The present paper develops a mathematical model to predict the light-duty electric vehicle overall consumed energy depending on architecture and configuration of vehicles with different degrees of electrification (e.g. electric vehicle and hybrid electric vehicle), on the type of electric motor (e.g. hybrid synchronous electric motor, permanent magnet motor or induction motor) and engine (e.g. gasoline (Otto or Atkinson) or Diesel), on technology of energy-storage system (e.g. lithium-ion or nickel-metal hydride battery) and on weight and geometry of the car being flexible drive cycles and for all types of wheel drive (four wheel, front and rear). The method is verified making a component-to-component revision through real automobiles that are available in the market to demonstrate the validity of the system.
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Nielsen, Claus Suldrup, Jesper Schramm, Anders Ivarsson, Azhar Malik, and Terese Løvås. "Evaluation of Test Bench Engine Performance Measurements in Relation to Vehicle Measurements on Chassis Dynamometer." In ASME 2015 Internal Combustion Engine Division Fall Technical Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/icef2015-1019.

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A 1600 cc direct injected turbocharged Euro 5 diesel engine was operated on standard diesel fuel from a gas station in Denmark for evaluation of the test bench procedure. The NEDC (New European Driving Cycle), FTP-75 (Federal Test Procedure) and WLTP (World Harmonized Light Vehicle Test Procedure) driving cycles were simulated in the engine test bench in two ways: 1) by transient engine operation were the inertia of the vehicle during deceleration was simulated by addition of power from an electric motor mounted on the crank shaft, and 2) by steady state measurements where the total driving pattern was simulated from an integration of multiple steady state measurements. The mathematical model that calculates equivalent NEDC driving cycle vehicle emissions from the engine steady state measurements in the test bench, starting with warm engine, is presented. By applying this model any driving cycle emissions can be calculated from the presented tabulated steady state measurements, starting with warm or cold engine. Both engine test methods showed acceptable agreement with measurement in an NEDC vehicle test on chassis dynamometer where the vehicle was equipped with a similar engine as the test bench engine. The two engine test bench methods gave very similar results, but the transient engine test procedure showed a little higher emission of CO2 and NOx, results that were closest to the vehicle measurements. This is interpreted as a result of extra emissions when the engine adjusts from one operating point to the next during transient operation. These extra emissions are not caught in the steady state method. Application of the two engine test procedures on the FTP-75 procedure and the newer WLTP showed that the steady state engine test method gave significantly lower emissions of NOx and a little lower CO2 emissions compared to the transient engine test. The results indicated that this was mainly an effect of the time delay on the engines EGR system adjustment, which is not caught in the steady state method. The advantages and disadvantages of applying the different measurement methods and test procedures are discussed in relation to introduction of new test procedures in order to reduce engine/vehicle emissions.
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Nos, O. V. "Matrix transformations in mathematical Models of an induction motor." In 2008 9th International Scientific-Technical Conference on Actual Problems of Electronic Instrument Engineering (APEIE). IEEE, 2008. http://dx.doi.org/10.1109/apeie.2008.4897073.

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Nos, O. V. "Matrix transformations in mathematical models of an induction motor." In 2008 9th International Scientific-Technical Conference on Actual Problems of Electronic Instrument Engineering (APEIE). IEEE, 2008. http://dx.doi.org/10.1109/apeie.2008.4897201.

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Nos, Oleg V. "Linear transformations in mathematical models of an induction motor by quaternions." In 2012 IEEE 13th International Conference and Seminar of Young Specialists on Micro/Nanotechnologies and Electron Devices (EDM 2012). IEEE, 2012. http://dx.doi.org/10.1109/edm.2012.6310240.

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Stefanski, Tadeusz, and Lukasz Zawarczynski. "Parametric identification of mathematical model of inverter drive hydraulic pump with induction motor." In 2017 22nd International Conference on Methods and Models in Automation and Robotics (MMAR). IEEE, 2017. http://dx.doi.org/10.1109/mmar.2017.8046959.

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Dmitriy, Shcherbakov, and Polyakov Vladimir. "Short review of development approaches of mathematical models for induction motor nonsymmetrical modes research." In 2021 XVIII International Scientific Technical Conference Alternating Current Electric Drives (ACED). IEEE, 2021. http://dx.doi.org/10.1109/aced50605.2021.9462311.

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Valdez Martinez, Jorge Salvador, Pedro Guevara Lopez, and Juan Carlos Garcia Infante. "Execution time Validation of the mathematical models of a electric motor in Soft Real Time simulation." In 2011 21st International Conference on Electrical Communications and Computers (CONIELECOMP). IEEE, 2011. http://dx.doi.org/10.1109/conielecomp.2011.5749349.

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9

Goncalves, D. E., J. D. Sanjuan, S. E. Di´az, and M. Pacheco. "Experimental Construction of Reduced Mathematical Models of Rotating Equipments in Operation." In ASME Turbo Expo 2003, collocated with the 2003 International Joint Power Generation Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/gt2003-38753.

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An experimental method is proposed to obtain simplified mathematical models of rotating equipment systems. The Instrumental Variable Filter (IVF) method is applied to estimate mass, damping and stiffness force coefficients within a frequency range, through experimental measurements. This method is based on the least squares approximation technique and it uses analytical weight functions to reduce the effect of noise in the measurements. The experimental data is obtained for different configurations of rotating equipments, which consist of rigid wheels, a flexible shaft supported by bushing bearings, an electrical motor, a base-plate, and a concrete foundation. Frequency response functions (FRF) were obtained by impact excitation techniques. In the tests, the unbalanced response measurements were compared with the ones predicted by the IVF model. The method allows the study of mass, damping and stiffness force coefficients as a function of excitation frequency. Linearities and non-linearities of phenomena are identified, and the method sums up all the individual components into a definition for the system. The tests were conducted by operating, or not, the motor, in order to evaluate the IVF method in both cases. The high correlation between the IVF (FRF, and unbalance responses) and the actual measurements of the FRF and unbalance responses, shows that the method generates useful mathematical models of dynamic systems, that can have industrial applications. Modal analysis methods were used to compare the natural frequencies and the damping ratios, obtained by dynamic coefficients estimation.
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Bannikov, A. A., and Y. R. Nikitin. "Development of a five-phase synchronous motor with permanent magnets." In 2022 33th All-Russian Youth Exhibition of Innovations. Publishing House of Kalashnikov ISTU, 2022. http://dx.doi.org/10.22213/ie022109.

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In this paper the design, mathematical and simulation models of a five-phase synchronous motor with permanent magnets and a simulation model of a control device have been developed. A mathematical model of electromagnetic processes in a five-phase motor and control system with three feedback loops has been developed in Matlab Simulink environment. The inner fast loop provides control of currents along d and q axes by means of PI controllers, which allows keeping the total stator current vector perpendicular to the rotor current-circuit vector and providing the highest torque. The middle circuit provides control of angular speed of shaft rotation by means of PI-controllers. The outer circuit provides control of the angular position of the motor rotor by means of the P controller. The parameters of the regulators are optimized. The transient process has no overshoot and the control time is 2.6 seconds. A prototype of the motor has been developed and manufactured.
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