journal6 ›› 2003, Vol. 24 ›› Issue (3): 13-18.

• Physics and electronics • Previous Articles     Next Articles

Optimal Sliding Mode Controller for a Class of Cascade Uncertain Nonlinear System

  

  1. (Automation College,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu China)
  • Online:2003-09-15 Published:2012-11-07
  • About author:CHEN Mou(1975-),male,was born in Nanchong,Sichuan Province,a student of NUAA studying for Ph.D;research area is uncertain nonlinear system control,integration fire/flight/propulsion control.
  • Supported by:

    Supported by National Natural Science Foundation of China (60174045)

Abstract: It is devoted to designing a kind of optimal sliding mode control method based on State Dependent Riccati Equation (SDRE) control for a class of cascade uncertain nonlinear system in this paper.This designed control method has two-loop control structure.The outer loop controller is designed by using a SDRE optimal control to generate an optimal sliding mode surface.The inner loop controller decreases sensitivity to parameter change by using sliding model control.Synchronously it can minish the influence coursed by model error and external disturbance of control system.Two methods are given to solve the state dependent riccati equation.The designed control method can make the system stable and robust.Finally,an example is given to demonstrate the availability of the proposed control method.

Key words: cascade system, nonlinear system, optimal control, sliding mode control

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