飞机的随机变结构最优控制方法

 <正> 一、引言 系统的变结构控制(VSC——Variable Structure Control)方法,最初是由苏联学者Utkin等人提出来的,近二十年来发展非常迅速,并越来越多地应用于各个工业领域,其中包括航空部门。变结构系统(VSS——Variable Structure System)的主要特征是存在滑动模态。处于滑动模态时,系统的运动等价于一个低阶系统。研究表明,VSS比传统的控制系统有更好的优点:快速性,对参数变化及外加扰动有强鲁棒性以及实现简单等。然而,VSC的不足之处在于需要获得全部状态变量,这是很难保证的。

THE METHOD OF RANDOM VARIABLE STRUCTURE OPTIMAL CONTROL FOR AIRCRAFT

An approach of variable structure optimal control for stochastic linear continuous systems whose measurement noise is Gaussian white noise is presented. The principle of separation is proven from design of sliding modes and selection of control variable. Therefore, the design of variable structure control and optimal estimation of state variables can be investigated seperately. Thus, it simplifies the design of variable structure control for stochastic systems. In this paper,the design of an aircraft control system is discussed using above method as illustration and numerical simulation is done.