The Experts below are selected from a list of 9324 Experts worldwide ranked by ideXlab platform
Zhiguo Zhao - One of the best experts on this subject based on the ideXlab platform.
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estimation of transmission input output Shaft Torque and drive wheel speed for compound power split powertrain based on unknown input observer
IEEE Transactions on Vehicular Technology, 2020Co-Authors: Mengna Li, Zhiguo ZhaoAbstract:Precise estimation of transmission input&output Shaft Torque and wheel speed is significant to the development of Torque distribution and coordinated control method for the power split hybrid powertrain system. This paper studies an estimation method of transmission input and output Torque as well as drive wheel speed using an unknown input observer in different operating modes for a compound power split hybrid powertrain system. Firstly, the configuration and dynamic characteristic of power split transmission is analyzed. Then, state equations in different operating modes are established, and a Takagi-Sugeno (T-S) fuzzy model is utilized to deal with the nonlinearities of load resistance Torque. Furthermore, an unknown input reduced-order observer is designed to estimate the transmission input&output Shaft Torque and wheel speed. The asymptotical stability of the developed observer is verified based on Lyapunov theory. Finally, the performance of the unknown input observer is assessed by comparing with the Luenberger observer based on Matlab/Simulink simulation platform and test bench. Simulation and experiment results show that, the proposed observer can estimate the transmission input&output Shaft Torque and wheel speed more effectively in different operating modes.
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Estimation of Transmission Input&Output Shaft Torque and Drive Wheel Speed for Compound Power Split Powertrain Based on Unknown Input Observer
IEEE Transactions on Vehicular Technology, 2020Co-Authors: Zhiguo Zhao, Fan Jiaqi, Jianping GaoAbstract:Precise estimation of transmission input&output Shaft Torque and wheel speed is significant to the development of Torque distribution and coordinated control method for the power split hybrid powertrain system. This paper studies an estimation method of transmission input and output Torque as well as drive wheel speed using an unknown input observer in different operating modes for a compound power split hybrid powertrain system. Firstly, the configuration and dynamic characteristic of power split transmission is analyzed. Then, state equations in different operating modes are established, and a Takagi-Sugeno (T-S) fuzzy model is utilized to deal with the nonlinearities of load resistance Torque. Furthermore, an unknown input reduced-order observer is designed to estimate the transmission input&output Shaft Torque and wheel speed. The asymptotical stability of the developed observer is verified based on Lyapunov theory. Finally, the performance of the unknown input observer is assessed by comparing with the Luenberger observer based on Matlab/Simulink simulation platform and test bench. Simulation and experiment results show that, the proposed observer can estimate the transmission input&output Shaft Torque and wheel speed more effectively in different operating modes.
C. K. Lim - One of the best experts on this subject based on the ideXlab platform.
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Probability assessment of turbine-generator Shaft Torque following severe disturbances on the system supply
IEEE Transactions on Energy Conversion, 1999Co-Authors: Thomas James Hammons, C. K. LimAbstract:This paper presents a probabilistic approach to the evaluation of the maximum torsional Torques induced in turbine generator Shafts following severe supply network disturbances with clearance, during high-speed auto-reclosure, and resulting from mal-synchronisation. In this context the investigations have been conducted on a range of machines taking into consideration the uncertainty of several factors associated with the practical operation of the power system. The results of these investigations are presented in the form of discrete probability distributions of the maximum torsional Torques induced in the turbine-generator Shaft sections. Also examined is the effect on maximum torsional Torques of employing detailed (2d, 3q) and reduced (1d, 1q) damper models of the synchronous generator. First, simulation of turbine-generators with up to 9 masses, using detailed and reduced rotor circuit models where L-L-L, L-L-G, L-L and L-G faults are cleared at fault current zeros and governor and AVR effects are represented, are summarised. Then, probability of disturbances and peak Shaft Torque at turbine-generator Shaft sections following bolted stator terminal short circuits and as a function of fault clearing time and following mal-synchronisation for a range of typical machines are presented. An approach to evaluate maximum turbine-generator Shaft Torques considering the uncertainties associated with the occurrence of disturbances and their attendant protective switching sequences is outlined
Dianguo Xu - One of the best experts on this subject based on the ideXlab platform.
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Vibration Suppression with Shaft Torque Limitation Using Explicit MPC-PI Switching Control in Elastic Drive Systems
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Can Wang, Weilong Zheng, Jiang Long, Ming Yang, Dianguo XuAbstract:In this paper, the application of model predictive control (MPC) for torsional vibration suppression and Shaft Torque limitation control in the elastic drive system is demonstrated. Standard MPC is converted to fast explicit MPC (EMPC) to solve its difficult online implementation issues. Constraint condition of Shaft Torque limitation control is first proposed through theoretical derivation, implying that the responses of Shaft Torque vary with the changed critical value of Shaft Torque, but the limitation function can still be available. Eventually, the EMPC-PI switching control is used for the application of Shaft Torque limitation control into the typical drive successfully, which can significantly reduce the amount of data storage, closer to practical industrial applications. Meanwhile, the advantage of eliminating the steady-state error provided from the PI controller can further enhance robustness of the system, compared with the pure EMPC controller. The switching criterion is based on the speed hysteresis value, which can be properly adjusted under different circumstances. Simulation and experimental results of speed step responses verify the EMPC-PI switching controller as a more effective approach compared with the PI controller designed by pole-placement method.
Can Wang - One of the best experts on this subject based on the ideXlab platform.
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Shaft Torque Limiting Control Using Shaft Torque Compensator for Two-Inertia Elastic System With Backlash
IEEE ASME Transactions on Mechatronics, 2016Co-Authors: Ming Yang, Weilong Zheng, Can Wang, Xiaoyu LangAbstract:This paper aims to present a solution for torsional vibration suppression and Shaft Torque limitation simultaneously in servo system with backlash. The existence of backlash, which would make conventional notch filter invalid, will aggravate the mechanical vibration and bring the risk of unsafety to the system. In order to solve that problem, a novel Shaft Torque compensator is proposed, which would make the system similar to a rigid system with one inertia. What is more, this compensator can limit Shaft Torque as expected, making the system relatively safe under any situation with different load inertias and Torques. The limiting control is based on the adaptive online identification of load inertia in order to improve robustness of the system and ensure not only the accuracy, but also the arbitrariness of Shaft Torque limit. Simulation and experimental results are presented to illustrate the favorable behavior of the drive with the robust Shaft Torque compensator.
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Vibration Suppression with Shaft Torque Limitation Using Explicit MPC-PI Switching Control in Elastic Drive Systems
IEEE Transactions on Industrial Electronics, 2015Co-Authors: Can Wang, Weilong Zheng, Jiang Long, Ming Yang, Dianguo XuAbstract:In this paper, the application of model predictive control (MPC) for torsional vibration suppression and Shaft Torque limitation control in the elastic drive system is demonstrated. Standard MPC is converted to fast explicit MPC (EMPC) to solve its difficult online implementation issues. Constraint condition of Shaft Torque limitation control is first proposed through theoretical derivation, implying that the responses of Shaft Torque vary with the changed critical value of Shaft Torque, but the limitation function can still be available. Eventually, the EMPC-PI switching control is used for the application of Shaft Torque limitation control into the typical drive successfully, which can significantly reduce the amount of data storage, closer to practical industrial applications. Meanwhile, the advantage of eliminating the steady-state error provided from the PI controller can further enhance robustness of the system, compared with the pure EMPC controller. The switching criterion is based on the speed hysteresis value, which can be properly adjusted under different circumstances. Simulation and experimental results of speed step responses verify the EMPC-PI switching controller as a more effective approach compared with the PI controller designed by pole-placement method.
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IECON - Mechanical resonance suppression and Shaft Torque limitation of two-mass drive system based on model predictive control
IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society, 2014Co-Authors: Can Wang, Ming Yang, Geng WangAbstract:The flexibility of transmission mechanisms in two-mass servo system can lead to its mechanical resonance. If the oscillation amplitude is beyond the Shaft tolerance, it will lead to system insecurity problems. In this paper, the model of transmission mechanisms is firstly established, and based on that, four strategies: engineering design, pole placement method, Shaft Torque state feedback method and model predictive control are studied to suppress mechanical vibration and protect the safety of transmission. Simulation results show the advantages and disadvantages of the four strategies, meanwhile confirm MPC as the optimal method. MPC can suppress mechanical resonance, limit the amplitude of the Shaft Torque and allow the system to complete the transient process with maximum acceleration, taking dynamic performance and security into account at the same time.
Michael Bargende - One of the best experts on this subject based on the ideXlab platform.
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Contactless Shaft Torque Detection for Wide Range Performance Measurement of Exhaust Gas Turbocharger Turbines
Journal of Turbomachinery, 2013Co-Authors: Bernhardt Lüddecke, Jan Ehrhard, Bastian Steinacher, Christian Seene, Dietmar Filsinger, Michael BargendeAbstract:Turbochargers develop away from an auxiliary component—being “off the shelve”—towards an integrated component of the internal combustion engine. Hence, increased attention is paid to the accuracy of the measured turbine and compressor maps. Especially turbine efficiency measurement under engine-relevant operating conditions (pulsed flow) is recently receiving increased attention in the respective research community. Despite various turbine map extrapolation methods, sufficient accuracy of the input test data is indispensable. Accurate experimental data are necessary to achieve high quality extrapolation results, enabling a wide range and precise prediction of turbine behavior under unsteady flow conditions, determined by intermittent operation of the internal combustion engine. The present work describes the first application of a contactless Shaft Torque measurement technique—based on magnetostriction—to a small automotive turbocharger. The contactless Torque measuring system is presented in detail and sensor principle as well as sensor calibration are illustrated. A sensitivity study regarding sensor position influences onto sensor signal proves the robustness and very good repeatability of the system. In the second part of the paper, steady state experimental results from operation on a conventional hot gas test stand over a wide map range are presented. These results are validated against full turbine stage (adiabatic as well as diabatic) CFD results as well as against “cold” efficiency measurements, based on measured inlet and outlet temperatures. The influence and relevance of bearing friction for such measurements is underlined and the improvements on this matter—achieved by direct Torque measurement—are demonstrated.
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Contactless Shaft Torque Detection for Wide Range Performance Measurement of Exhaust Gas Turbocharger Turbines
Journal of Turbomachinery, 2013Co-Authors: Bernhardt Lüddecke, Jan Ehrhard, Bastian Steinacher, Christian Seene, Dietmar Filsinger, Michael BargendeAbstract:Turbochargers develop away from an auxiliary component - being "off the shelve" - Towards an integrated component of the internal combustion engine. Hence, increased attention is paid to the accuracy of the measured turbine and compressor maps. Especially turbine efficiency measurement under enginerelevant operating conditions (pulsed flow) is recently receiving increased attention in the respective research community. Despite various turbine map extrapolation methods, sufficient accuracy of the input test data is indispensable. Accurate experimental data are necessary to achieve high quality extrapolation results, enabling a wide range and precise prediction of turbine behavior under unsteady flow conditions, determined by intermittent operation of the internal combustion engine. The present work describes the first application of a contactless Shaft Torque measurement technique - based on magnetostriction - To a small automotive turbocharger. The contactless Torque measuring system is presented in detail and sensor principle as well as sensor calibration are illustrated. A sensitivity study regarding sensor position influences onto sensor signal proves the robustness and very good repeatability of the system. In the second part of the paper, steady state experimental results from operation on a conventional hot gas test stand over a wide map range are presented. These results are validated against full turbine stage (adiabatic as well as diabatic) CFD results as well as against "cold" efficiency measurements, based on measured inlet and outlet temperatures. The influence and relevance of bearing friction for such measurements is underlined and the improvements on this matter - Achieved by direct Torque measurement - Are demonstrated. Copyright © 2013 by ASME.