Global fast terminal sliding mode controller for hydraulic turbine regulating system with actuator dead zone |
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| Authors: | Zhihuan Chen Xiaohui Yuan Xiaotao Wu Yanbin Yuan Xiaohui Lei |
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| Institution: | 1. School of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. Engineering Research Center for Metallurgical Automation and Measurement Technology of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;3. College of Mathematics and Statistics, Huanggang Normal University, Huanggang 438000, China;4. School of Resource and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China;5. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China |
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| Abstract: | This paper investigates the frequency change problem of hydraulic turbine regulating system based on terminal sliding mode control method. By introducing a novel terminal sliding mode surface, a global fast terminal sliding mode controller is designed for the closed loop. This controller eliminates the slow convergence problem which arises in the terminal sliding mode control when the error signal is not near the equilibrium. Meanwhile, following consideration of the error caused by the actuator dead zone, an adaptive RBF estimator based on sliding mode surface is proposed. Through the dead zone error estimation for feed-forward compensation, the composite terminal sliding mode controller has been verified to possess an excellent performance without sacrificing disturbance rejection robustness and stability. Simulations have been carried out to validate the superiority of our proposed methods in comparison with other two other kinds of sliding mode control methods and the commonly used PID and FOPID controller. It is shown that the simulation results are in good agreement with the theoretical analysis. |
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| Keywords: | Corresponding authors |
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