飞翼飞行器的操纵面故障自适应补偿控制

Nonlinear adaptive failure compensation control for flying wing aircraft

中文关键词  飞翼布局飞行器  自适应反步控制  执行器故障  误差补偿  执行器饱和  预定动态性能

英文关键词  flying wing aircraft  adaptive backstepping control  actuator failure  error compensation  actuator saturation  prescribed performance bound

中文摘要

      本文针对具有操纵面卡死、失效故障以及执行器饱和的飞翼飞行器纵向运动，考虑系统的预定动态性能，提出了一种自适应反步补偿跟踪控制方案.设计预定动态性能边界以保证系统的跟踪误差，采用二阶指令滤波器限制执行器的饱和，通过控制分配避免执行器故障后对横侧向运动的影响.所设计的自适应反步补偿跟踪控制律能够保证系统对参考信号的渐近跟踪.仿真结果表明了本文方法的有效性.

英文摘要

      An adaptive backstepping failure compensation tracking scheme is proposed for a flying wing aircraft nonlinear longitudinal dynamics in this paper, with considering the actuator stuckness or loss of effectiveness, saturation nonlinearity of the actuators and prescribed performance bound (PPB) of the closed loop system. The prescribed performance bound is designed to guarantee that the tracking errors are constrained within prespecified envelope, second-order low-pass command filters are introduced to avoid saturation of the actuators, control allocation is designed to reduce the effect on the lateral motion of the aircraft. The proposed adaptive backstepping failure compensation tracking law can guarantee the asymptotical tracking of the reference signals. Simulation results show the effectiveness of the proposed control scheme.