论文部分内容阅读
针对高超声速飞行器子系统与控制器异步切换问题,提出了一种鲁棒H∞控制策略.构造了依赖于控制器切换信号的Lyapunov函数,可以有效抵消由异步切换带来的控制器设计困难,结合平均驻留时间方法和Lyapunov函数方法,分析了系统的全局一致渐近稳定性和H∞性能指标,设计了异步切换的鲁棒H∞控制器.仿真结果表明,该方法实现高超声速飞行器在异步切换过程中对指令的精确跟踪,控制量在异步切换时刻无跳跃现象,同时对扰动具有较强的抑制作用.
Aiming at the problem of asynchronous switching between hypersonic vehicle subsystem and controller, a robust H∞ control strategy is proposed. The Lyapunov function which depends on the switch signal of the controller is constructed, which can effectively counteract the controller design difficulties caused by asynchronous switching, By combining the average dwell time method and the Lyapunov function method, the globally uniform asymptotic stability and the H∞ performance index of the system are analyzed and a robust H∞ controller with asynchronous switchover is designed. The simulation results show that the proposed method achieves the performance of the hypersonic vehicle in Accurate tracking of instructions in asynchronous switching process, the control of the number of jumps in the asynchronous switch time no phenomenon, while the disturbance has a strong inhibitory effect.