Sliding mode control of engine-variable pump-variable motor drive system |
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| Authors: | Zhao Lijun Wang Ying Wei Yuying Liu Qinghe Yin Chengshun |
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| Institution: | 1. School of Automobile Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, P.R.China;2. Shanghai Pal-Fin Automatic Control Technology Co., Ltd, Shanghai 201206, P.R.China |
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| Abstract: | Engine-variable pump-variable motor drive system is a complex nonlinear system.In order to improve system response speed and stability, a sliding-mode variable-structure control based on a feedback linearization theory is analyzed in this research.A standardized system model is established and linearized by the feedback linearization theory, and the input dimension is reduced through the relationship between variables which has simplified the linearization process.Then the sliding-mode controller using an exponential reaching law is designed and the Lyapunov stability of this algorithm is verified.The simulation results show that the sliding-mode variable-structure controller based on the feedback linearization theory can improve system response speed, reduce overshoot and achieve stronger robustness, so the vehicle speed control requirements can be satisfied well. |
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| Keywords: | feedback linearization sliding mode control exponential approach law robust-ness |
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