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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2003, Vol. 4 Issue (1): 58-63    DOI: 10.1631/jzus.2003.0058
Information & Computer Technology     
Adaptive terminal sliding mode control for high-order nonlinear dynamic systems
ZHUANG Kai-yu, SU Hong-ye, ZHANG Ke-qin,, CHU Jian
National Lab. of Industrial Control Technology, Institute of Advanced Process Control,Zhejiang University, Hangzhou 310027, China
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Abstract  An adaptive terminal sliding mode control (SMC) technique is proposed to deal with the tracking problem for a class of high-order nonlinear dynamic systems. It is shown that a function augmented sliding hyperplane can be used to develop a new terminal sliding mode for high-order nonlinear systems. A terminal SMC controller based on Lyapunov theory is designed to force the state variables of the closed-loop system to reach and remain on the terminal sliding mode, so that the output tracking error then converges to zero in finite time which can be set arbitrarily. An adaptive mechanism is introduced to estimate the unknown parameters of the upper bounds of system uncertainties. The estimates are then used as controller parameters so that the effects of uncertain dynamics can be eliminated. It is also shown that the stability of the closed-loop system can be guaranteed with the proposed control strategy. The simulation of a numerical example is provided to show the effectiveness of the new method.

Key words： Terminal sliding mode control      Finite time convergence      Adaptive laws     
Received: 10 November 2001     
CLC:  TP13  
  TP273  
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ZHUANG Kai-yu
SU Hong-ye
ZHANG Ke-qin
CHU Jian
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ZHUANG Kai-yu, SU Hong-ye, ZHANG Ke-qin,, CHU Jian. Adaptive terminal sliding mode control for high-order nonlinear dynamic systems. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2003, 4(1): 58-63.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2003.0058     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2003/V4/I1/58

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