Journal articles: 'Noise immunity of control'

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Polushin, P. A., O. R. Nikitin, and I. R. Dubov. "Quasioptimal control in diversed signal transmission." IOP Conference Series: Materials Science and Engineering 1227, no. 1 (February 1, 2022): 012003. http://dx.doi.org/10.1088/1757-899x/1227/1/012003.

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Abstract To increase the noise immunity of signal transmission, diversity methods are now widely used, consisting in obtaining and combining several copies of the transmitted signal. In this case, it is possible to perform a combination either before the detection procedure or after it. If you do not take into account the possible use of non-linear types of modulation, then the pre-detector combination always has advantages over the post-detector combination. However, taking into account the nonlinear properties of the transmitted signals, new possibilities appear for increasing the noise immunity in combination and simplifying the processing. In the case of using analog signals, in particular frequency modulation, at certain points in time, the pre-detection combination can lose to the post-detection combination. At the same time, by combining pre-detector and post-detector combining circuits, it is possible to lower the threshold level during demodulation and increase noise immunity. In the case of using digital modes of modulation, it is possible to process only the signals after demodulation without reducing the noise immunity and to eliminate the need for preliminary phasing of the diversity signals before detection.

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Jaikumar, R., and P. Poongodi. "Noise measurement in high-speed domino pseudo-CMOS keeper." Measurement and Control 52, no. 1-2 (November 28, 2018): 20–27. http://dx.doi.org/10.1177/0020294018813642.

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Noise immunity is the foremost issue in high-speed domino circuits. In general, better noise immunity is achieved at the cost of speed and power degradation. In this paper, pseudo-dynamic keeper design is proposed to reduce the delay and power with improved noise immunity for domino circuits. The proposed technique is able to achieve reduced delay, power consumption, and better noise immunity by using always ON keeper. The simulation results show that the proposed technique exhibits 41%, 39%, and 19% delay reduction when compared with the low power dynamic circuit for two-input OR gate, two-input EX-OR gate, and 4:1 multiplexer. The proposed logic also performs better as compared to a low power dynamic circuit with 24%, 21%, and 14% reduction in power-delay product for two-input OR gate, two-input EX-OR gate, and four input MUX, respectively. The unity noise gain is also improved as compared to all other existing methods.

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Zayats, Р. V., and I. Y. Malevich. "Increasing the noise immunity of radio receiving paths with automatic sensitivity control." Doklady BGUIR 19, no. 2 (March 27, 2021): 74–82. http://dx.doi.org/10.35596/1729-7648-2021-19-2-74-82.

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The relevance of the study of automatic sensitivity control systems (ASC) is determined by their demand for the creation and modernization of radio receiving paths (RRP) with increased noise immunity for radar systems, radio navigation and radio communication. The article analyzes typical attenuating ASCs, which are traditionally widely used to match the dynamic range (DR) of the RRP with the DR of a group radio signal, determined by the current state of the electromagnetic environment at the receiving system location. The fundamental possibility of increasing the noise immunity of RRPs with attenuating ASCs is shown on the basis of the current analysis of the resulting output signal in the IF main filter band. At the same time, it was found that the procedure for determining the optimal value of the attenuator transmission coefficient is characterized by low response speed. In addition, an increase in noise immunity in a RRP with such ASC leads to a significant loss of sensitivity. To overcome the disadvantages of attenuating ASCs, structures that implement the exchange of the transmission coefficient of the RRP to DR and linearity are proposed. Studies of various possible ASC structures have shown that with a proportional exchange of the transmission coefficient for the DR, an improvement in the noise immunity of the RRP is provided while maintaining a high sensitivity of the system. An original ASC system is proposed, which is invariant to the sampling step of the transmission coefficients of controlled elements with increased performance. The considered structural solutions and algorithms make it possible to optimize the technical appearance of RRPs for radar, radio navigation and radio communication with increased noise immunity and to adapt their characteristics to the conditions of nonstationary electromagnetic environment.

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Bykov, Yu N. "Noise Immunity of a Radio-Control System with Frequency Modulation." Telecommunications and Radio Engineering 66, no. 8 (2007): 729–39. http://dx.doi.org/10.1615/telecomradeng.v66.i8.30.

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Kaganov, V. I., and S. V. Tereshchenko. "Noise-immunity of the double-loop system of automatic control." Journal of Communications Technology and Electronics 57, no. 3 (March 2012): 323–28. http://dx.doi.org/10.1134/s1064226912020040.

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Kozlovsky, Vladimir, Pavel Nikolaev, Alexander Podgorny, Alexander Saksonov, and Luiza Shamina. "Algorithm development for finding the minimum level of noise immunity of an onboard electrical complex during control tests." E3S Web of Conferences 221 (2020): 01005. http://dx.doi.org/10.1051/e3sconf/202022101005.

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An algorithm for finding the minimum level of noise immunity of the onboard electrical complex during control tests is developed in this paper. The expression is obtained for the frequency tuning step of a narrow-band electromagnetic action and an algorithm is developed that compared with the standard to more accurately find the minimum level of noise immunity of ETS.

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Perov, Alexandr. "Noise Immunity Analysis of LocataNet Navigation Receiver." International Review of Aerospace Engineering (IREASE) 11, no. 3 (June 30, 2018): 127. http://dx.doi.org/10.15866/irease.v11i3.14581.

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Mahor, Vikas, and Manisha Pattanaik. "Low Leakage and Highly Noise Immune FinFET-Based Wide Fan-In Dynamic Logic Design." Journal of Circuits, Systems and Computers 24, no. 05 (April 8, 2015): 1550073. http://dx.doi.org/10.1142/s0218126615500735.

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Wide fan-in dynamic logic OR gate has always been an integral part of high speed microprocessors. However, low noise immunity of wide fan-in dynamic logic gate is always an issue of concern. For maintaining high noise immunity, various large sized PMOS keeper-based dynamic OR gates are proposed in the literature. These designs allow large leakage through them for maintaining high noise immunity which unnecessarily increases the power dissipation. This can be a critical issue for microprocessors used in battery operated devices. Independent gate (IG) FinFET devices are known to reduce leakage current through them using back gate biasing technique. In this paper, a novel FinFET-based wide fan-in dynamic OR gate has been proposed with effective leakage control and high noise immunity. This work reports a maximum leakage power reduction up to 70% while maintaining up to 90% higher noise immunity as compared to standard dynamic OR gate at low keeper size. This work also mathematically illustrates the effective leakage reduction capability of FinFET as compared to CMOS and hence proves its preference over CMOS in wide fan-in dynamic OR gate.

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Minochkin, Anatolii, Andrii Shyshatskyi, Vitalii Hasan, Anatolii Hasan, Andrii Opalak, Anatolii Hlushko, Oleksandr Demchenko, Anna Lyashenko, Oksana Havryliuk, and Stanislav Ostapenko. "The improvement of method for the multi-criteria evaluation of the effectiveness of the control of the structure and parameters of interference protection of special-purpose radio communication systems." Technology audit and production reserves 4, no. 2(60) (July 31, 2021): 22–27. http://dx.doi.org/10.15587/2706-5448.2021.235465.

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Military radio communication systems are the basis of special purpose control systems and the object of the enemy’s primary influence. Therefore, the issue of increasing the noise immunity of military radio communication systems is important and needs further research. Thus, the object of the research was chosen to be a military radio communication system. Maintaining a given level of noise immunity for military radio systems is one of the key issues in radio resource management, the effective management of which allows the use of the entire suitable frequency range for the transmission (reception) of electromagnetic energy by radio electronic devices. A number of works have been devoted to the ways search for increasing the noise immunity of military radio communication systems. One such way is to develop new (improve existing) approaches for assessing the effectiveness of military radio interference management. This work solves the problem of improving the method of multicriteria management effectiveness evaluation of the structure and parameters of the military radio systems noise protection. The scientific problem is solved by the devices of multicriteria estimation of the of noise protection level of the military radio communication system, graphic display of the executed and not executed tasks, the aggregation scheme of formation of the integrated estimation of noise protection. The research used scientific methods of analysis and synthesis, also the theory provisions of signal-code structures and the provisions of the complex technical systems theory. The peculiarity of the proposed improvement of the methodology is the multi-criteria assessment of the noise immunity level of the military radio communication system in the conditions of radio electronic conflict. The proposed technique allows: – to evaluate the effectiveness of noise protection management; – to substantiate the optimal configuration of the military radio communication system in solving the problems of noise protection management in the conditions of radio electronic conflict; – to identify the ways to increase noise immunity at the stage of operational management of the military radio communication system in the conditions of electronic conflict. The results of the research should be used in assessing the effectiveness of management of noise protection of military radio communication systems and determining the optimal structure and parameters of military radio systems.

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Vyboldin, Yu K., and S. V. Borisov. "Interference effect of impulse noise on noise immunity of communication and control channels in underground structures." IOP Conference Series: Earth and Environmental Science 87 (October 2017): 082054. http://dx.doi.org/10.1088/1755-1315/87/8/082054.

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Bobylev, D. A., and L. P. Borovskikh. "Multicomponent Two-Terminal Network Parameters Conversion: System Performance and Noise Immunity." Automation and Remote Control 81, no. 9 (September 2020): 1725–32. http://dx.doi.org/10.1134/s000511792009012x.

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Stopa, M., and C. M. Marcus. "Magnetic Field Control of Exchange and Noise Immunity in Double Quantum Dots." Nano Letters 8, no. 6 (June 2008): 1778–82. http://dx.doi.org/10.1021/nl801282t.

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Leushin, A. V. "INCREASED NOISE IMMUNITY COMMAND RADIO LINK SIGNALS WITH OFDM." RADIO COMMUNICATION TECHNOLOGY, no. 49 (July 21, 2021): 7–20. http://dx.doi.org/10.33286/2075-8693-2021-49-07-20.

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Reviewed the work of the command radio link with OFDM signals, which implements a quasicorrelative reception phaseshift keyed signals without a timing that provides improved immunity system and the ability to work in low relations signal/noise at low requirements to stabilize the frequencies of the reference oscillators of transmitter and receiver. The noise immunity estimation of the proposed system in comparison with radio lines operating with signals of frequency telegraphy and relative phase telegraphy is given. The main problematic issues of building a command radio control line caused by the use of OFDM signals are revealed.

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Miroshnichenko, I. P., I. A. Parinov, and V. P. Sizov. "On increasing the noise immunity of micro acoustic-mechanical gyroscope." E3S Web of Conferences 124 (2019): 03011. http://dx.doi.org/10.1051/e3sconf/201912403011.

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The paper proposes and describes a new modified micro acoustic-mechanical gyroscope, which, while maintaining the positive qualities of known analogues, differs in comparison with them its enhanced functionality by converting the angular speeds of rotation of the supporting base into electrical signals simultaneously with respect to two axes of rotation and increasing the level of the useful signal compared to with noise level. The proposed technical solution is protected by a patent of the Russian Federation for invention. The proposed gyroscope can be used in navigation systems, orientation and control of various moving objects in aviation technology, auto transport, robotics, etc.

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Schulz, H., H. J. Golberg, F. Gruson, M. Durler, and S. J. Spiegel. "GPS low noise amplifier with high immunity to wireless jamming signals and power control option." Advances in Radio Science 2 (May 27, 2005): 195–97. http://dx.doi.org/10.5194/ars-2-195-2004.

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Abstract. A SiGe GPS low noise amplifier with power control option and high immunity to wireless jamming signals is presented. These novel features applied to Atmel’s ATR0610 GPS LNA allow significant power saving at the radio interface while meeting the out-of-band linearity requirements. The results show the noise figure less than 2.1 dB, including the embedded pre-select filter, and out-of-band IIP3 above +8 dBm in the frequency range between 1.8GHz and 2 GHz with 3mA current consumption. The GPS system performance shows GPS sensitivity below -141 dBm with 5 ms integration interval.

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Chen, Jingliang, Jun Su, Orest Kochan, and Mariana Levkiv. "Metrological Software Test for Simulating the Method of Determining the Thermocouple Error in Situ During Operation." Measurement Science Review 18, no. 2 (April 1, 2018): 52–58. http://dx.doi.org/10.1515/msr-2018-0008.

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AbstractThe simplified metrological software test (MST) for modeling the method of determining the thermocouple (TC) error in situ during operation is considered in the paper. The interaction between the proposed MST and a temperature measuring system is also reflected in order to study the error of determining the TC error in situ during operation. The modelling studies of the random error influence of the temperature measuring system, as well as interference magnitude (both the common and normal mode noises) on the error of determining the TC error in situ during operation using the proposed MST, have been carried out. The noise and interference of the order of 5-6 μV cause the error of about 0.2-0.3°C. It is shown that high noise immunity is essential for accurate temperature measurements using TCs.

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Xu, Yao-Hua, Shuai Yang, Hang Li, Ji-Ming Lv, and Na Bai. "Adaptive Noise-Resistant Low-Power ASK Demodulator Design in UHF RFID Chips." Electronics 10, no. 24 (December 20, 2021): 3168. http://dx.doi.org/10.3390/electronics10243168.

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This paper presents a new signal demodulator for ultra-high frequency (UHF) radio frequency identification (RFID) tag chips. The demodulator is used to demodulate amplitude shift keying (ASK) modulated signals with the advantages of high noise immunity, large input range and low power consumption. The demodulator consists of a charge pump, an envelope detector, and a comparator. In particular, the demodulator provides a hysteresis input signal to the comparator through two envelope detectors, resulting in better noise immunity. The demodulator is based on a standard 0.13 µm CMOS process. The demodulator is suitable for demodulating high frequency signals at 900 MHz with a data rate of 128 Kbps and can operate up to 78 °C. The input signal has a peak of 1.2 V and consumes as little as 113.6 nW. The demodulator also has a noise immunity threshold of approximately 3.729 V.

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Petunin, V. I., and A. I. Frid. "Noise immunity of automatic GTE control systems with a selector at channel switching modes." Russian Aeronautics (Iz VUZ) 50, no. 4 (December 2007): 409–14. http://dx.doi.org/10.3103/s1068799807040113.

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Bashly, P. N. "Quasioptimal antenna array control in the problem of increasing noise immunity of information systems." Optoelectronics, Instrumentation and Data Processing 44, no. 4 (August 2008): 325–30. http://dx.doi.org/10.3103/s8756699008040067.

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Li, Xiaoli, Jinsong Chen, Longlong Zhao, Shanxin Guo, Luyi Sun, and Xuemei Zhao. "Adaptive Distance-Weighted Voronoi Tessellation for Remote Sensing Image Segmentation." Remote Sensing 12, no. 24 (December 16, 2020): 4115. http://dx.doi.org/10.3390/rs12244115.

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The spatial fragmentation of high-resolution remote sensing images makes the segmentation algorithm put forward a strong demand for noise immunity. However, the stronger the noise immunity, the more serious the loss of detailed information, which easily leads to the neglect of effective characteristics. In view of the difficulty of balancing the noise immunity and effective characteristic retention, an adaptive distance-weighted Voronoi tessellation technology is proposed for remote sensing image segmentation. The distance between pixels and seed points in Voronoi tessellation is established by the adaptive weighting of spatial distance and spectral distance. The weight coefficient used to control the influence intensity of spatial distance is defined by a monotone decreasing function. Following the fuzzy clustering framework, a fuzzy segmentation model with Kullback–Leibler (KL) entropy regularization is established by using multivariate Gaussian distribution to describe the spectral characteristics and Markov Random Field (MRF) to consider the neighborhood effect of sub-regions. Finally, a series of parameter optimization schemes are designed according to parameter characteristics to obtain the optimal segmentation results. The proposed algorithm is validated on many multispectral remote sensing images with five comparing algorithms by qualitative and quantitative analysis. A large number of experiments show that the proposed algorithm can overcome the complex noise as well as better ensure effective characteristics.

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Ram, Ganapathy, and Santha K R. "Review of Sliding Mode Observers for Sensorless Control of Permanent Magnet Synchronous Motor Drives." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 1 (March 1, 2018): 46. http://dx.doi.org/10.11591/ijpeds.v9.i1.pp46-54.

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Permanent magnet synchronous motors (PMSMs) are increasingly used in high performance variable speed drives of many industrial applications. PMSM has many features, like high efficiency, compactness, high torque to inertia ratio, rapid dynamic response, simple modeling and control, and maintenance free operation. Presence of position sensors presents several disadvantages, such as reduced reliability, susceptibility to noise, additional cost and weight and increased complexity of the drive system. For these reasons, the development of alternative indirect methods for speed and position control becomes an important research topic. Advantages of sensorless control are reduced hardware complexity, low cost, reduced size, cable elimination, increased noise immunity, increased reliability and decreased maintenance. The key problem in sensorless vector control of ac drives is the accurate dynamic estimation of the stator flux vector over a wide speed range using only terminal variables (currents and voltages). The difficulty comprises state estimation at very low speeds where the fundamental excitation is low and the observer performance tends to be poor. Moreover, the noises of system and measurements are considered other main problems. This paper presents a comprehensive study of the different sliding mode observer methods of speed and position estimations for sensorless control of PMSM drives.

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Wen, L., Z. Li, and Y. Li. "High-performance dynamic circuit techniques with improved noise immunity for address decoders." IET Circuits, Devices & Systems 6, no. 6 (November 1, 2012): 457–64. http://dx.doi.org/10.1049/iet-cds.2012.0002.

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Gornostaev, A. I. "Features of ensuring noise immunity of interface modules for temperature control in measuring instruments of spacecraft." Spacecrafts & Technologies 5, no. 2 (June 25, 2021): 89–101. http://dx.doi.org/10.26732/j.st.2021.2.04.

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An important stage in the development of temperature control interface modules for measuring instruments, implemented according to the main-modular principle of construction on the basis of a central instrument module and used as part of a measuring system on spacecraft for various purposes, is to ensure their noise-immune operation when the measuring system is exposed to a combination of various types of interference which determine the electromagnetic environment on the spacecraft. The article is devoted to the analysis of the characteristics of various types of interference affecting the measuring system, identifying the ways of their penetration into the temperature control interface module and determining the influence of the characteristics of these interference on the choice of measures to ensure the required noise immunity of the temperature control interface module as part of the measuring device. It is shown that the paths of interference penetration into the interface temperature control module depend on the frequency and time characteristics of the interference affecting the measuring system. Measures to mitigate these interference must be determined after assessing the danger of their penetration into the interface temperature control module for each path separately in the entire frequency range of their impact. Based on the results of such assessments, a set of reasonable measures should be determined to ensure the noise immunity of the interface temperature control module as part of the measuring device, implemented in combination at the design levels of the measuring system, the measuring device and the interface temperature control module.

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Wang, Bao Gui, Yan Liu, Yan Bo Song, Jian Wang, and Zhi Guang Zhang. "The Control System Design of the Pod Based on Fuzzy-PID." Applied Mechanics and Materials 615 (August 2014): 52–57. http://dx.doi.org/10.4028/www.scientific.net/amm.615.52.

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When the pod works in the air, pod can produce the overshoot and stability. To solve this problem, the study demonstrates that the fuzzy-PID was used to control the pod. Simulink simulation module of Matlab was using to establish a control system model pod exterior orientation framework to verify the simulation, anti-jamming performance and tracking performance of the system. The results show that fuzzy PID control method can make the system have good stability, noise immunity and tracking capability.

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Fedorov, V. K., E. G. Balenko, S. V. Dvornikov, and O. S. Lauta. "Model for Assessing the Immunity of Channels Using Frequency Manipulation Signals." Journal of Physics: Conference Series 2096, no. 1 (November 1, 2021): 012045. http://dx.doi.org/10.1088/1742-6596/2096/1/012045.

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Abstract The issues of noise immunity of control channels of robotic systems using signals with frequency shift keying are considered. The article presents the results of estimating the probability of a bit error depending on the duration of the intervals at which the time coincidence of the structural interference with the signal occurs. Proposals are formulated for the practical use of the results obtained.

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Babajans, Ruslans, Darja Cirjulina, Juris Grizans, Arturs Aboltins, Dmitrijs Pikulins, Maris Zeltins, and Anna Litvinenko. "Impact of the Chaotic Synchronization’s Stability on the Performance of QCPSK Communication System." Electronics 10, no. 6 (March 10, 2021): 640. http://dx.doi.org/10.3390/electronics10060640.

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The current work presents a study of the implementation of a quadrature chaos phase-shift keying communication system (QCPSK) based on the employment of different chaos oscillators. The research takes two directions, with one being the study of the chaos synchronization’s noise immunity for several chaos oscillators that are the potential core blocks of the QCPSK system. The correlation coefficient over time is used to estimate the synchronization noise immunity. The second direction is the estimation of the QCPSK system’s baseband model performance in the AWGN propagation channel using the bit error ratio (BER) as the estimation method for several chaos oscillators employed as the core of the QCPSK system’s model.

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Li, Jiafang, Qian Han, Runxiang Zhang, Honggui Liu, Xiang Li, and Jun Bao. "PSV-7 Effects of music stimulus on behavior response, cortisol level and immunity horizontal of growing pigs." Journal of Animal Science 98, Supplement_4 (November 3, 2020): 224–25. http://dx.doi.org/10.1093/jas/skaa278.412.

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Abstract Enrichment environment is widely used to improve the welfare of domestic animals and satisfy their natural behavior. Music as an enriched environment can reduce abnormal behavior in humans, non-human primates and rodents. The aim of this study was to investigate the effects of repeated music stimuli on the behavior, physiology and immunity of growing pigs. A total of 72 5-week-old hybrid piglets (Large White × Duroc × Minpig) were randomly divided into three treatments groups of the music group (Mozart K.448, 65–70 dB), the noise group (mechanical noise, 85–90 dB) and the control group (silence, less than 40dB). During 60 days of auditory exposure, the behavioral responses, cortisol level and immune horizontal of the piglets were measured. The results showed that the active behavior of the growing pigs increased and lying behavior decreased in the music group compared to the control group (P < 0.05). The music stimulus increased tail wagging, tail in curl and playing behaviors (P < 0.05). The noise stimulus increased aggressive behavior (P < 0.05) but had no effect on the exploring and manipulative behaviors (P > 0.05). The frequency of the event behaviors decreased with the time of auditory stimuli (P < 0.05). Short-term music stimulus had a lower cortisol level than the noise and control groups (P < 0.05). Long-term music stimulus increased the level of IgG, IL-2 and IFN-γ (P < 0.05) and decreased the IL-4 level (P < 0.05). Noise stimulus reduced the level of IgG (P < 0.05) but had no effect on the level of IL-2, IL-4 and IFN-γ (P > 0.05). In conclusion, music stimulus triggers the pigs to show more positive behaviors, and the short-term music stimulus can reduce the stress response, while the long-term music stimulus can enhance the immune responses in the growing pigs.

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Santis, Christos T., Yaakov Vilenchik, Naresh Satyan, George Rakuljic, and Amnon Yariv. "Quantum control of phase fluctuations in semiconductor lasers." Proceedings of the National Academy of Sciences 115, no. 34 (August 7, 2018): E7896—E7904. http://dx.doi.org/10.1073/pnas.1806716115.

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Few laser systems allow access to the light–emitter interaction as versatile and direct as that afforded by semiconductor lasers. Such a level of access can be exploited for the control of the coherence and dynamic properties of the laser. Here, we demonstrate, theoretically and experimentally, the reduction of the quantum phase noise of a semiconductor laser through the direct control of the spontaneous emission into the laser mode, exercised via the precise and deterministic manipulation of the optical mode’s spatial field distribution. Central to the approach is the recognition of the intimate interplay between spontaneous emission and optical loss. A method of leveraging and “walking” this fine balance to its limit is described. As a result, some two orders of magnitude reduction in quantum noise over the state of the art in semiconductor lasers, corresponding to a minimum linewidth of 1 kHz, is demonstrated. Further implications, including an additional order-of-magnitude enhancement in effective coherence by way of control of the relaxation oscillation resonance frequency and enhancement of the intrinsic immunity to optical feedback, highlight the potential of the proposed concept for next-generation, integrated coherent systems.

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Li, Zhe, Rui Miao, Chuan Qi Wei, Ze Feng Li, and Zhi Bin Jiang. "A Robust MEWMA Control Chart Based on FAST-MCD Algorithm." Advanced Materials Research 562-564 (August 2012): 1907–11. http://dx.doi.org/10.4028/www.scientific.net/amr.562-564.1907.

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MEWMA control chart is generally used to monitor slight deviation of mean vector for multivariate process. Sample covariance matrix S is often applied to estimate population covariance . When the initial sample data contains outliers, the results may be impacted and then weak the probabilities of control chart signals since the conventional mean vector and covariance matrix are not robust statistics. In this paper, FAST-MCD algorithm is used to build a robust covariance matrix to improve the robustness of MEWMA control chart. From the analysis of samples, the robust MEMWA control chart based on FAST-MCD algorithm has better immunity to small amount of noise in the initial samples.

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Menendez, Alberto, Antonio Barbancho, Enrique Personal, and Diego Fco Larios. "Industrial Fieldbus Improvements in Power Distribution and Conducted Noise Immunity With No Extra Costs." IEEE Transactions on Industrial Electronics 58, no. 7 (July 2011): 2653–61. http://dx.doi.org/10.1109/tie.2010.2080251.

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Dong, Gui Rong. "Application of Gain Scheduled PID Control in the Lithography Positioning System." Applied Mechanics and Materials 220-223 (November 2012): 1752–56. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.1752.

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According to the perturbation in lithography positioning control system, a novel gain scheduled PID controller using a root mean square (RMS) signal is proposed. Perturbation is also referred as the stage hunting, and the positioning control system will be very weak against small disturbances such as electrical noise or even structural vibration of the building in which the stage is installed. The gain scheduled PID controller is used to minimize the stage hunting and simultaneously maximize the immunity to disturbances. Simulations results verify the effectiveness of the gain scheduled PID controller for the positioning control in the lithography stage, as compared with the traditional PID controller.

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Magalhaes, Pedro, Perrin Neto, and Cristina Magalhães. "New Carré Equation." Metrology and Measurement Systems 17, no. 2 (January 1, 2010): 173–94. http://dx.doi.org/10.2478/v10178-010-0016-6.

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New Carré EquationThe present work offers new equations for phase evaluation in measurements. Several phase-shifting equations with an arbitrary but constant phase-shift between captured intensity signs are proposed. The equations are similarly derived as the so called Carré equation. The idea is to develop a generalization of the Carré equation that is not restricted to four images. Errors and random noise in the images cannot be eliminated, but the uncertainty due to their effects can be reduced by increasing the number of observations. An experimental analysis of the errors of the technique was made, as well as a detailed analysis of errors of the measurement. The advantages of the proposed equation are its precision in the measures taken, speed of processing and the immunity to noise in signs and images.

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Sasayama, T., S. Suzuki, M. Amano, N. Kuribara, S. Sakamoto, and S. Suda. "An Advanced Engine Control System Using Combustion Pressure Sensors." Proceedings of the Institution of Mechanical Engineers, Part D: Transport Engineering 201, no. 1 (January 1987): 55–59. http://dx.doi.org/10.1243/pime_proc_1987_201_157_02.

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While investigating high-efficiency responsive driveability accompanied by low exhaust emissions, a new concept in engine control has been developed. The method is based on the direct monitoring and controlling of combustion conditions in engines, using a newly developed combustion pressure sensor. Fibre-optic technology is adapted to this sensor to produce a high noise immunity and a simple structure that facilitates applications in automotive engines. A sensing method to obtain information on engine output, knocking or detonation and the combustion temperature from the signal of the combustion pressure sensor has been proposed. A control system for the engine and powertrain control using this sensing method has been put forth to provide a remarkable improvement in engine and powertrain characteristics.

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De Moraes, Leonardo Barlette, Alexandra Lackmann Zimpeck, Cristina Minhardt, and Ricardo Augusto Da Luz Reis. "FinFET Inverter Designs: Behavior and Challenges of Process Variability." Journal of Integrated Circuits and Systems 16, no. 2 (August 15, 2021): 1–13. http://dx.doi.org/10.29292/jics.v16i2.222.

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Abstract— Technology scaling alongside the increasing process variability impact in modern technology nodes are themain reasons to control deviations over metrics in IC nanome-ter designs. Schmitt Triggers are traditionally used for noise immunity enhancement, and have been recently applied to mitigate radiation effects and process variability impact. The main contribution of this work is to trace the relationship between transistor sizing, supply voltage, and process variability to get a low energy consumption circuit while still keeping low levels of deviations due to the impact of process-induced variability. It is shown that a cost-benefit analysis can highlight sets of sizing and supply voltage where it can provide a 37.51% decrease in energy consumption while only increasing its sensibility by 7.42%. Furthermore, it is presented that the dependence of supply voltage and sensibility to process variability is not directly related, with slight decreases in the supply volt-ages bringing better results. Overall, the traditional CMOS inverter is still the fastest and most energy-efficient circuit, although, when comparing noise immunity characteristics, the 6-Transistor Schmitt Trigger presents higher noise margins, slopes, gains, and hysteresis ratios. The improvements,although, may increase propagation times, energy consumption, and area.

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Li, Chao, Yi Qun Yang, and Xu Yao Hao. "The Design and Implementation Approach of a Dual Redundant Servo Controller." Applied Mechanics and Materials 734 (February 2015): 198–202. http://dx.doi.org/10.4028/www.scientific.net/amm.734.198.

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To solve the problem of steering gear and its bypass electromagnetic interference to servo controller communication system. Design of a four-steering gear control system based on dual redundant communication CAN bus and RS422 bus communication. Analysis Method of voting dual redundant data communications. Introduction implementation of the servo controller. The experimental results show that this system has good fault tolerance and noise immunity.

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Tsmots, I. G., O. Ya Riznyk, B. I. Balych, and Ch Z. Lvovskij. "The method and simulation model for the synthesis of barker-like code sequences." Ukrainian Journal of Information Technology 3, no. 2 (November 23, 2021): 45–50. http://dx.doi.org/10.23939/ujit2021.02.045.

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Noise immunity is one of the essential characteristics of modern wireless data reception/transmission systems. In wireless systems such as Wi-Fi, HiperLan, or Bluetooth, the signal is propagated by electromagnetic oscillations in the environment. However, unlike wiring systems, these oscillations are unprotected from external influences. Noise immunity is one of the essential characteristics of modern wireless data reception/transmission systems. Moreover, if several wireless systems work close enough to each other, there is a possibility of overlapping waves, which will damage the information signal. It is determined that for the tasks of control of unmanned aerial vehicles and mobile robotic complexes increasing the noise immunity of data transmission channels is an urgent problem. It has been investigated that Barker-like code sequences based on ideal ring bundles provide an increase in the power of the obtained sequences by optimizing the parameters of the ideal ring bundles used. It is determined that the increase of noise immunity during data reception and transmission is achieved by choosing the optimal ratios of the parameters of the ideal ring bundle. It is shown that the advantages of Barker-like code sequences such as the optimal ratio between the length of the sequence and its correcting ability, the ability to change the length of the sequence depending on the level of interference are widely used in modern wireless communication and telecommunications systems. The method of synthesis of Barker-like code sequences with the use of ideal ring bundles has been improved, which, by taking into account the ratios of the parameters of ideal ring bundles, provides the choice of the minimum bit code sequence that takes into account the level of interference. A simulation model of synthesis of Barker-like code sequences, noise generation, and error correction has been developed on the basis of the improved method of synthesis of Barker-like code sequences. The developed simulation model is used to study the processes of coding, decoding, detection, and correction of errors in the obtained Barker-like code sequences. It has been investigated that the use of synthesized Barker-like code sequences based on ideal ring bundles provides data recovery of damaged no more than 25 % of the bits of each codeword, and detects up to 50 % of damaged bits in each codeword. Keywords: Barker-like code sequence; ideal ring bundle; noise-tolerant coding; simulation model.

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37

Gizatullin, Z. M., and M. P. Shleimovich. "Analysis of Noise Immunity of the UAV Onboard Control System Based on Physical Modeling of Induced Interference." Russian Aeronautics 64, no. 3 (July 2021): 554–61. http://dx.doi.org/10.3103/s1068799821030259.

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Panteleymonov, I. N., A. V. Belozertsev, and А. А. Monastyrenko. "The Main Trends in Developing Highly Reliable Communication and Control Systems for Unmanned Aerial Vehicles." Proceedings of Higher Educational Institutions. Маchine Building, no. 06 (723) (June 2020): 78–88. http://dx.doi.org/10.18698/0536-1044-2020-6-78-88.

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This work examines the problem of developing a highly reliable and universal communication and control system for unmanned aerial vehicles that provides uninterrupted operation regardless of the vehicles’ location and destination. For this purpose, it is proposed to create three digital data transmission networks: ground, air and satellite using a stack of TCP/IP protocols and modern methods of management, processing and display of information (SCADA-system). To improve reliability, survivability, stealth and noise immunity of the communication and control system of unmanned aerial vehicles it is proposed to transmit information in the optical and radio bands.

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Knyazev, Volodymyr, Vladimir Kravchenko, Bogdan Lazurenko, Oleksandr Serkov, Karyna Trubchaninova, and Nataliia Panchenko. "Development of methods and models to improve the noise immunity of wireless communication channels." Eastern-European Journal of Enterprise Technologies 1, no. 5(115) (February 25, 2022): 35–42. http://dx.doi.org/10.15587/1729-4061.2022.253458.

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It has been shown that existing methods and models for improving the noise immunity of communication channels are not capable of meeting requirements for the quality of information in mobile infocommunication systems. In addition, the compromised quality of information fails to protect it and provide the speed of information transmission and density of access channels. It has been proven that reducing the level of electromagnetic radiation is the main method of ensuring noise immunity in wireless mobile communication systems of infocommunication systems. Therefore, one way to ensure the stable interference-free operation is to reduce the level of the information signal at the receiver input to the noise level when the signal/noise ratio is equal to one. This paper reports the results of studying methods and models with correlation reception of ultra-wideband signals. It is proved that according to the level of potential noise immunity, the best indicators are shown by the model of encoding an ultra-wideband information signal by phase manipulation, followed by the coding model with opposite chips, and the code-time manipulation model. It is shown that with a large base of the signal B>300 when the intensity of the received signals is below the level of interference, reliable transmission of information is carried out with a probability of error of less than 10-6. This proves that the use of ultra-wide signal technology allows for wireless hidden transmission of information with low radiation power and a low probability of error. Thus, at a speed of 12 Mb/s, it is possible to chain the transmission of information with a probability of error less than 10-6 if there is a large signal base used, B =500‒1000.

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Dovbnya, V. G., and O. V. Yakovlev. "Influence of Quality of the Automatic Gain Control System Functioning on Noise Immunity of Reception of Multiposition Signals." Telecommunications and Radio Engineering 62, no. 9 (2004): 769–76. http://dx.doi.org/10.1615/telecomradeng.v62.i9.10.

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Savchenko, V. V. "Enhancement of the noise immunity of a voice-activated robotics control system based on phonetic word decoding method." Journal of Communications Technology and Electronics 61, no. 12 (December 2016): 1374–78. http://dx.doi.org/10.1134/s1064226916120226.

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Беляев, В. П., С. В. Мищенко, and П. С. Беляев. "Исследование коэффициента диффузии в тонких изделиях из пористых материалов." Журнал технической физики 89, no. 10 (2019): 1630. http://dx.doi.org/10.21883/jtf.2019.10.48184.420-18.

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A new method for studying mass transfer process in porous media has been considered, which allows the rapid diffusion coefficient control in thin products without destroying them and without the preliminary calibration of the diffuser concentration meter. The method provides an increase in the measurement accuracy due to the possibility of choosing the measured parameters included in the design expression. Parameters are taking from the segments of converter static characteristic. The converter has high sensitivity and noise immunity.

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Fu, Yukun, Huiyun Ma, Chenggang Yu, Liangliang Dong, Yunshan Yang, Xiaohua Zhu, and Hanwen Sun. "Analysis of Effective Operation Performance of Wireless Control Downhole Choke." Shock and Vibration 2020 (November 12, 2020): 1–12. http://dx.doi.org/10.1155/2020/7831819.

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Wireless control downhole throttle is designed to control the opening of downhole throttle remotely by ground pressure wave signal to regulate downhole production in a wireless and intelligent manner. The throttle’s production regulation capability and the noise immunity of the signal receiver are the key factors affecting the reliability of the throttle operation. Based on computational fluid dynamics (CFD) theory, the flow field of downhole throttle is simulated numerically to study the flow resistance characteristics of wireless control downhole throttle and the stability of flow field at signal receiver. Finally, the field test proves that the tool achieves the design capacity of production regulation and can accurately receive signals to regulate downhole production in a wireless and intelligent manner. The research content of this paper provides theoretical and experimental basis for the further improvement and optimization of the wireless control downhole throttle’s structure and has certain guiding significance for the field use of the throttle, achieving the purpose of downhole wireless intelligent production adjustment.

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Wu, Dongxu, Fusheng Liang, Chengwei Kang, and Fengzhou Fang. "Performance Analysis of Surface Reconstruction Algorithms in Vertical Scanning Interferometry Based on Coherence Envelope Detection." Micromachines 12, no. 2 (February 8, 2021): 164. http://dx.doi.org/10.3390/mi12020164.

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Optical interferometry plays an important role in the topographical surface measurement and characterization in precision/ultra-precision manufacturing. An appropriate surface reconstruction algorithm is essential in obtaining accurate topography information from the digitized interferograms. However, the performance of a surface reconstruction algorithm in interferometric measurements is influenced by environmental disturbances and system noise. This paper presents a comparative analysis of three algorithms commonly used for coherence envelope detection in vertical scanning interferometry, including the centroid method, fast Fourier transform (FFT), and Hilbert transform (HT). Numerical analysis and experimental studies were carried out to evaluate the performance of different envelope detection algorithms in terms of measurement accuracy, speed, and noise resistance. Step height standards were measured using a developed interferometer and the step profiles were reconstructed by different algorithms. The results show that the centroid method has a higher measurement speed than the FFT and HT methods, but it can only provide acceptable measurement accuracy at a low noise level. The FFT and HT methods outperform the centroid method in terms of noise immunity and measurement accuracy. Even if the FFT and HT methods provide similar measurement accuracy, the HT method has a superior measurement speed compared to the FFT method.

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Baumbick, R. J. "Fiber Optics for Propulsion Control Systems." Journal of Engineering for Gas Turbines and Power 107, no. 4 (October 1, 1985): 851–55. http://dx.doi.org/10.1115/1.3239822.

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The term “fiber optics” means the use of dielectric waveguides to transfer information. In aircraft systems with digital controls, fiber optics has advantages over wire systems because of its inherent immunity to electromagnetic noise (EMI) and electromagnetic pulses (EMP). It also offers a weight benefit when metallic conductors are replaced by optical fibers. To take full advantage of the benefits of optical waveguides, passive optical sensors are also being developed to eliminate the need for electrical power to the sensor. Fiber optics may also be used for controlling actuators on engine and airframe. In this application, the optical fibers, connectors, etc., will be subjected to high temperatures and vibrations. This paper discusses the use of fiber optics in aircraft propulsion systems, together with the optical sensors and optically controlled actuators being developed to take full advantage of the benefits which fiber optics offers. The requirements for sensors and actuators in advanced propulsion systems are identified. The benefits of using fiber optics in place of conventional wire systems are discussed as well as the environmental conditions under which the optical components must operate. Work being done under contract to NASA Lewis on optical and optically activated actuators sensors for propulsion control systems is presented.

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Choi, Seong-Wook, Kiho Seong, Sukho Lee, Kwang-Hyun Baek, and Yong Shim. "Noise Immunity-Enhanced Capacitance Readout Circuit for Human Interaction Detection in Human Body Communication Systems." Electronics 11, no. 4 (February 14, 2022): 577. http://dx.doi.org/10.3390/electronics11040577.

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Recent healthcare systems based on human body communication (HBC) require human interaction sensors. Due to the conductive properties of the human body, capacitive sensors are most widely known and are applied to many electronic gadgets for communication. Capacitance fluctuations due to the fact of human interaction are typically converted to voltage levels using some analog circuits, and then analog-to-digital converters (ADCs) are used to convert analog voltages into digital codes for further processing. However, signals detected by human touch naturally contain large noise, and an active analog filter that consumes a lot of power is required. In addition, the inclusion of ADCs causes the system to use a large area and amount of power. The proposed structure adopts a digital-based moving average filter (MAF) that can effectively operate as a low-pass filter (LPF) instead of a large-area and high-power consumption analog filter. In addition, the proposed ∆C detection algorithm can distinguish between human interaction and object interaction. As a result, two individual digital signals of touch/release and movement can be generated, and the type and strength of the touch can be effectively expressed without the help of an ADC. The prototype chip of the proposed capacitive sensing circuit was fabricated with commercial 65 nm CMOS process technology, and its functionality was fully verified through testing and measurement. The prototype core occupies an active area of 0.0067 mm2, consumes 7.5 uW of power, and has a conversion time of 105 ms.

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Gao, Mei Juan, and Zhi Xin Yang. "Research and Realization on the Voice Command Recognition System for Robot Control Based on ARM9." Applied Mechanics and Materials 44-47 (December 2010): 1422–26. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.1422.

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In this paper, based on the study of two speech recognition algorithms, two designs of speech recognition system are given to realize this isolated speech recognition mobile robot control system based on ARM9 processor. The speech recognition process includes pretreatment of speech signal, characteristic extrication, pattern matching and post-processing. Mel-Frequency cepstrum coefficients (MFCC) and linear prediction cepstrum coefficients (LPCC) are the two most common parameters. Through analysis and comparison the parameters, MFCC shows more noise immunity than LPCC, so MFCC is selected as the characteristic parameters. Both dynamic time warping (DTW) and hidden markov model (HMM) are commonly used algorithm. For the different characteristics of DTW and HMM recognition algorithm, two different programs were designed for mobile robot control system. The effect and speed of the two speech recognition system were analyzed and compared.

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Loginov, Sergei, Dmitriy Fedorov, Igor Savrayev, Igor Plokhov, Andrey Hitrov, and Alexander Hitrov. "INDUCTIVE LINEAR DISPLACEMENT SENSOR IN ACTIVE MAGNETIC BEARING." ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June 20, 2019): 151. http://dx.doi.org/10.17770/etr2019vol3.4070.

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Active magnetic bearings are increasingly used in various fields of industry. The absence of mechanical contact makes it possible to use them in ultra-high-speed electric drives. The main trend of active magnetic bearings development is the improvement of the control system. The main problem of the control system is the displacement sensor (most of them has low accuracy and large interference). The sensor must have the following properties: simple in realization, high linearity of the characteristic, high sensitivity and noise immunity, high reliability. At the present time there is no sensor that satisfies all these conditions. Most manufacturers use various kinds of filters to get an accurate position signal. This increases the response time of the control system. Thus, problem of designing and modeling the position sensor, considered in the article is topical.

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Lai, Wen-Cheng. "Chip Design of an All-Digital Frequency Synthesizer with Reference Spur Reduction Technique for Radar Sensing." Sensors 22, no. 7 (March 27, 2022): 2570. http://dx.doi.org/10.3390/s22072570.

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5.2-GHz all-digital frequency synthesizer implemented proposed reference spur reducing with the tsmc 0.18 µm CMOS technology is proposed. It can be used for radar equipped applications and radar-communication control. It provides one ration frequency ranged from 4.68 GHz to 5.36 GHz for the local oscillator in RF frontend circuits. Adopting a phase detector that only delivers phase error raw data when phase error is investigated and reduces the updating frequency for DCO handling code achieves a decreased reference spur. Since an all-digital phase-locked loop is designed, the prototype not only optimized the chip dimensions, but also precludes the influence of process shrinks and has the advantage of noise immunity. The elements of novelties of this article are low phase noise and low power consumption. With 1.8 V supply voltage and locking at 5.22 GHz, measured results find that the output signal power is −8.03 dBm, the phase noise is −110.74 dBc/Hz at 1 MHz offset frequency and the power dissipation is 16.2 mW, while the die dimensions are 0.901 × 0.935 mm2.

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Peterson, J. N., W. C. Hunter, and M. R. Berman. "Control of segment length or force in isolated papillary muscle: an adaptive approach." American Journal of Physiology-Heart and Circulatory Physiology 256, no. 6 (June 1, 1989): H1726—H1734. http://dx.doi.org/10.1152/ajpheart.1989.256.6.h1726.

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Mechanical studies of isolated cardiac muscle are complicated as a result of damage inflicted on the ends of the muscle during excision and mounting procedures. Inhomogeneities between the healthy central and weakened end portions of the muscle make it difficult to interpret studies where only total muscle length is controlled. Measurement and control of central segment length is clearly desirable but fraught with technical difficulties. We present a novel application of adaptive control methods that minimizes the difficulties encountered with current control techniques. This method, which allows control of either segment length or force, takes advantage of the repetitive, periodic nature of contractions. Here deviations of measured segment length or force signals from a desired response during one twitch are used to modify the muscle length command signal for use on the next twitch. This process continues for successive twitches until either segment length or force is within desired limits. The adaptive method allows greater stability and immunity to noise than classical feedback strategies.

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Journal articles on the topic 'Noise immunity of control'

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