基于L1自适应控制的飞机操纵面故障重构

摘要

Considering the aircraft control surface failures and the poor transient performance of the traditional model reference adaptive control method,a reconfiguration control method based on L1 adaptive control theory is proposed to control a flying-wing unmanned air vehicle's lateral roll angle.The parameter changes caused by control surface failures are treated as model uncertainly and coupling among three axis are treated as outer disturbance. The L1 adaptive reconfiguration controller can gain fast adaptation and robustness through choosing adaptive law and low-pass filter. Simulations are conducted when the aileron is floating, 100% damaged and locked. Simulation results shows that the designed controller can guarantee the fast asymptotic convergence of tracking errors and good transient performance, and the L1 adaptive reconfiguration control method is effective for control surface failure configuration.%针对飞机操纵面故障及传统的模型参考自适应方法动态性能欠佳的问题,提出了一种基于L1自适应控制理论的飞翼无人机横侧向滚转角重构控制方法;该方法将操纵面故障引起的模型参数的变化视为模型不确定性,将三轴间的交联耦合处理为外部干扰;通过选择合适的自适应律和低通滤波器,使L1自适应重构控制器同时满足快速自适应性和鲁棒性;针对操纵面发生漂浮、完全损失及卡死等故障进行了仿真.仿真结果表明:控制器可使跟踪误差快速收敛且动态性能良好,所提出的重构方法可用于操纵面故障的重构控制.