区域极点约束非脆弱鲁棒飞行控制器设计

Non-fragile and Robust Flight Control with Regional Pole Constraint

研究飞行控制系统性能优化问题,针对区域极点约束条件下飞行控制系统非脆弱鲁棒控制器设计,飞控系统含有外部扰动,为了保证飞控系统的鲁棒性和响应品质,提出用模型参数摄动和加性控制器增益摄动的鲁棒控制,根据线性矩阵不等式理论,给出了非脆弱鲁棒控制器的可解性条件。同时为保证系统具有良好的动态特性,将闭环极点配置在复平面上指定的圆盘区域内。并用鲁棒控制和极点配置结合,给出满足鲁棒性、非脆弱性、干扰抑制性能和动态响应特性的控制器进行仿真。仿真结果表明控制器系统满足多目标控制要求,证明方法的可行性和有效性。

A non-fragile and robust controller for flight control systems with regional pole constraint is investigated.For robust control problem with exogenous disturbance,model parameter uncertainties and additive controller gain perturbations,a solvability condition for the existence of non-fragile and robust controller is derived in the form of linear matrix inequality（LMI）.At the same time the closed-loop poles are assigned in a prescribed disk in the complex plane to ensure the specified dynamic performance.Finally,a controller design method combined by robust control with pole placement is proposed,and with this controller,the performances of robustness,non-fragility,disturbance attenuation and closed-loop characteristics can be satisfied simultaneously.According to the simulation,the multiple control objectives of the aircraft are satisfied,showing the feasibility and effectiveness of the control law.