Adaptive variable structure control for large-scale time-delayed systems with unknown nonlinear dead-zone  

作　　者：Shen Qikun Zhang Tianping 

机构地区：[1]Dept. of Computer, Coll. of Information Engineering, Yangzhou Univ., Yangzhou 225009, P. R. China

出　　处：《Journal of Systems Engineering and Electronics》2007年第4期865-870,共6页系统工程与电子技术（英文版）

基　　金：This project was supported by the National Natural Science Foundation of China (60074013);the Foundation of New Era Talent Engineering of Yangzhou University.

摘　　要：The problem of adaptive fuzzy control for a class of large-scale, time-delayed systems with unknown nonlinear dead-zone is discussed here. Based on the principle of variable structure control, a design scheme of adaptive, decentralized, variable structure control is proposed. The approach removes the conditions that the dead-zone slopes and boundaries are equal and symmetric, respectively. In addition, it does not require that the assumptions that all parameters of the nonlinear dead-zone model and the lumped uncertainty are known constants. The adaptive compensation terms of the approximation errors axe adopted to minimize the influence of modeling errors and parameter estimation errors. By theoretical analysis, the closed-loop control system is proved to be semiglobally uniformly ultimately bounded, with tracking errors converging to zero. Simulation results demonstrate the effectiveness of the approach.The problem of adaptive fuzzy control for a class of large-scale, time-delayed systems with unknown nonlinear dead-zone is discussed here. Based on the principle of variable structure control, a design scheme of adaptive, decentralized, variable structure control is proposed. The approach removes the conditions that the dead-zone slopes and boundaries are equal and symmetric, respectively. In addition, it does not require that the assumptions that all parameters of the nonlinear dead-zone model and the lumped uncertainty are known constants. The adaptive compensation terms of the approximation errors axe adopted to minimize the influence of modeling errors and parameter estimation errors. By theoretical analysis, the closed-loop control system is proved to be semiglobally uniformly ultimately bounded, with tracking errors converging to zero. Simulation results demonstrate the effectiveness of the approach.

关 键 词：nonlinear dead-zone decentralized control adaptive control variable structure control 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置]