基于多模型自适应的飞行控制系统重构与优化

Reconfiguration and optimization of flight control system based on multi-model adaptive method

对飞行器执行机构受损或失效情况下其飞行控制规律重构的问题,提出一种基于线性二次最优控制理论的多模型自适应控制重构技术方案。利用线性二次调节器获得参考模型,基于故障诊断与检测技术,运用Lyapunov稳定性理论,确保闭环控制系统的严格正实性和全局渐进稳定性。根据飞行器的动力学控制规律,进行故障辨识和模型切换,实现故障状态下飞行控制规律的重构与优化设计。针对典型故障情况进行飞行器控制重构仿真验证,结果表明系统能够在舵面部分失效下完成控制重构,保证有效飞行器运行控制。

For the reconstruction problem of the flight control law when aircraft actuator was damaged or in failure cases, a new reconfiguration scheme of flight control system was proposed based on the linear quadratic optimal control theory and multi-model adaptive method. Based on fault diagnosis and detection technology, the reference model was obtained by the Linear Quadratic Regulator （LQR）. Lyapunov stability theory was applied to ensure the strictly positive real parts and global asymptotic stability of the closed-loop control system. According to the vehicle dynamics control law for fault identification and model switching, the reconfiguration and optimization of vehicle control law based on the multi-model adaption was designed. Against the typical fault conditions, the reconfiguration simulation of the flight control system was made to verify the method, and the corresponding verification results were given, which can ensure that the aircraft effective operation.