基于随机鲁棒设计的高超音速飞行器变结构控制

摘要

针对高超音速飞行器输入输出之间强耦合,系统参数不确定以及变结构控制器中的设计参数整定问题,提出了随机鲁棒变结构控制方案；这一控制方案基于系统控制需求,利用蒙特卡罗仿真方法建立随机鲁棒目标函数,通过遗传算法优化系统设计参数；针对某常规高超音速飞行器纵向模型仿真结果显示,该控制方案不仅保证了飞行的纵向稳定性,提高了变结构控制器的控制性能,而且具有强鲁棒性.%A variable structure control based on stochastic robustness design is presented according to hypersonic vehicle model have input/output strong coupling, uncertain parameters, and how to confirm design parameters of variable structure controller. This control scheme based on system control requirements, using monte carlo simulation method to establish stochastic robustness cost function, and through genetic algorithm for system design parameters are optimized. The controller is demonstrated in closed loop simulations based on an existing longitudinal hypersonic vehicle model. Simulation results show that the controller not only can ensure the longitudinal flight stability and improve the control performance of variable structure controller but also have strong robustness.