高超声速飞行器抗饱和鲁棒自适应切换控制

针对高超声速飞行器执行机构饱和的控制器设计问题，提出一种多回路抗饱和鲁棒自适应切换控制方法. 首先针对高超声速飞行器的运动模态在频率上表现出显著的分离特性，将状态变量分开不同的回路设计；然后对受执行机构饱和影响明显的状态设计参考切换系统，从而降低模型和控制器参数设计的复杂性，将一系列可能导致执行机构饱和的事件视作切换信号，选定参考切换模型及鲁棒自适应控制器，保证控制输入不达到饱和状态，并通过多李亚普诺夫函数方法和线性矩阵不等式分析了控制器的稳定性. 仿真结果表明了控制方案的有效性，在存在执行机构失效故障和干扰的情况下，系统状态可良好的跟踪参考状态且控制输入小于执行机构限幅.

Anti-saturation robust adaptive switching control scheme of a hypersonic flight vehicle

A robust adaptive switching control scheme with a multi-loop control structure was proposed for hypersonic flight vehicles in the presence of actuator constraints. State variables was designed with the multi-time-scale property of hypersonic vehicle motion, and the switched system was established to describe the state variables related to actuator constraints, thus cutting down the design effort for switched reference system and the corresponding controllers. The events that potentially induce actuator saturation were regarded as switching signals that specify the active subsystem and corresponding robust adaptive controller, which ensure control input restricted. Utilizing the multiple Lyapunov functions method and model reference adaptive control methodology, a detailed stability analysis for such control scheme was designed which guarantees the closed-loop switched system globally asymptotically stable with linear matrix inequation (LMI). Simulation demonstrates the effectiveness of the switching control scheme, and the system has well tracking performance and the amplitude of control input satisfies the actuator limit.