为了提高飞行控制系统的鲁棒性和抗干扰性能,提出一种基于简单自适应控制的飞行控制律设计方法。根据简单自适应控制应用条件,需要保证飞行控制系统满足正实性的要求,为此引入并联前馈补偿器,将其转化为同时镇定问题,并利用YALMIP工具箱对相应的线性矩阵不等式进行求解;在PI调节律中引入了对误差的积分项以更好地抑制外部扰动;以某型飞机侧向飞行控制系统为例,针对系统参数摄动和承受有界干扰情况,对所提出的方法进行了仿真分析与验证。结果表明利用该方法设计的飞行控制系统在跟踪参考输入信号时具有较好的自适应跟踪性能和鲁棒性能。

A method for design of flight control law was presented based on Simple Adaptive Control (SAC) for improving robustness and anti-interference performance of the flight control system. A parallel feedforward compensator was introduced to make the flight control system meet the demand of positive realness, and thus the gains computing was transformed into a synchronous stabilization problem. The solution of linear matrix inequality was computed by utilizing YALMIP toolbox. An integral item of error was added to the PI regulative law to restrain interference effectively. Taking the lateral flight control system of an aircraft as an example, simulation was carried out for the cases with perturbing parameter and interference. The result showed that the flight control system designed by this method has fine adaptive tracking performance and robustness when following the reference input signals.