高超音速BTT巡航飞行器变结构控制系统设计

针对高超音速BTT巡航飞行器气动参数变化大,动力学特性具有气动、惯性交叉耦合和运动学耦合的特点,采用了基于反馈线性化和变结构理论的控制器设计方法.首先利用时间尺度理论将控制系统分为快变量和慢变量两个子系统,然后应用动态逆反馈分别对子系统进行线性化解耦,最后根据线性变结构理论单独设计各通道控制器.仿真结果显示基于方法设计的姿态控制器可以确保对指令跟踪的精确性和鲁棒性,姿态指令跟踪无静差,响应超调量小于10%.

Design of Variable Structure Control System for Hypersonic BTT Vehicle

In view of the great changes of aerodynamic parameters, the cross- coupling between the inertia and the aerodynamics, and the kinematics coupling of the hypersonic BTT vehicle, a design of control based on feedback - linearization and variable structure control theory is proposed. In this method, the control system was separated in-to fast and slow variable subsystems in terms of the time-scale theory. Then the subsystems were respectively lineardecoupling in terms of the dynamic inversion feedback. The controller was designed based on the theory of linear vari-able structure control with respect to each attitude channel. The simulation results show that the attitude controller de-signed based on this method ensures that its tracking performance is accurate and robust. The error of attitude angle has no static difference and overshoot is kept under 10%.