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		Hongqiang WANG,Daiqiang CAO,Xudong WANG.[en_title][J].Control Theory and Technology,2013,11(1):086~091.[Copy]

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HongqiangWANG,DaiqiangCAO,XudongWANG
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(PLA 95997 Unit; Engineering College, Air Force Engineering University)

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Received:February 12, 2011Revised:September 07, 2011

基金项目:This work was supported by the National Natural Science Foundation of China (No. 60674031), and the Doctorate Foundation of the Engineering College, Air Force Engineering University (No. BC07004).

The stochastic sliding mode variable structure guidance laws based on optimal control theory

Hongqiang WANG,Daiqiang CAO,Xudong WANG

(PLA 95997 Unit; Engineering College, Air Force Engineering University)

Abstract:

A stochastic sliding-mode variable structure guidance law involving optimal control theory is presented for the missile target intercept model, in which state noise, uncertain system parameters, target movement and measured noise are considered. This guidance law synthesizes the merits of optimal guidance law with line-of-sight rate convergence and sliding-mode guidance law with strong robustness. Through theoretic analysis, it is proved that the sliding mode hyperplane is sub-achievable in the closed loop system. The numerical results show the effectiveness of the proposed control algorithm.

Key words: Stochastic system Variable structure control Optimal control Guidance law Robust