基于高超声速飞行器抗干扰故障诊断控制

Study on anti-disturbance and fault diagnosis control for the hypersonic vehicle

提出一种高超声速飞行器抗干扰及故障诊断跟踪控制策略,对于外部干扰通过设计干扰观测器对其进行估计和抵消,达到抗干扰目的;针对故障,通过设计带有投影算法的自适应滤波器,对系统故障进行估计,进而保证闭环系统的稳定。进一步,结合线性矩阵不等式以及Lyapunov函数稳定性分析,保证增广状态系统在干扰和故障双重作用下,仍能保证闭环系统具有很好的动态特性。最后通过MATLAB/Simulink的仿真分析验证了算法的有效性。

A tracking control strategy based on Anti-disturbance fault diagnosis is proposed and applied to hypersonic vehicle.In the actual flight process,hypersonic vehicle is prone to accidents because of its strong coupling,nonlinear,fast time-varying system and high-speed flight.In this paper,external disturbances are suppressed and cancelled by designing disturbance observers,so as to achieve anti-disturbance effect and ensure the stability of closed-loop system.Furthermore,the convex optimization algorithm and Lyapunov function analysis are combined to ensure that the augmented system still has good dynamic characteristics under both disturbances and faults.Finally,the closed-loop system is verified by MATLAB/Simulink simulation and the algorithm is effective.