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针对存在有界干扰和控制器参数不确定性的变体飞行器,研究非脆弱有限时间鲁棒控制器的设计问题.首先建立变体飞行器纵向运动的切换系统模型.考虑到每个子系统具有不同的特性,基于多Lyapunov函数方法和模态依赖驻留时间方法分析了飞行器系统有限时间有界性能及满足H_∞性能指标的充分条件,降低了控制器设计的保守性.此外,由于在控制器设计中不可避免地存在不确定性,设计了基于状态反馈的非脆弱鲁棒控制器,并以线性矩阵不等式的形式给出了控制器存在的充分条件和求解方法.最后,通过仿真验证了所提出方法的优越性和有效性.
Aiming at the design of non-fragile finite-time robust controllers for variant vehicles with bounded disturbances and uncertainties of controller parameters, a switched-mode model for the longitudinal movement of the modified aircraft is established. Considering that each subsystem has a different Based on the multi-Lyapunov function method and the modal dependent dwell time method, the sufficient conditions for finite-time bounded performance of the aircraft system and the H_∞ performance index are analyzed and the conservativeness of the controller design is reduced. In addition, We have designed the non-fragile robust controller based on state feedback and presented the sufficient condition and solution method of the existence of controller in the form of linear matrix inequalities.Finally, The superiority and effectiveness of the method.