考虑滞回非线性的飞行姿态backstepping全局滑模控制

针对存在不确定性和滞回非线性的三代战机姿态稳定控制问题,提出一种基于非线性干扰观测器的backstepping全局滑模控制策略。利用非线性干扰观测器对系统不确定性和滞回非线性部分进行观测补偿,取消了不确定项变化缓慢的限制条件。借鉴动态面控制思想,引入一阶滤波器降低了backstepping控制器的复杂程度。利用Lyapunov定理证明了系统的稳定性。仿真结果表明了该控制方案对不确定干扰的有效抑制和闭环系统良好的跟踪性能。

Backstepping global sliding mode control for flight attitude tracking control system with hysteretic nonlinearity

A backstepping global sliding mode control scheme based on nonlinear disturbance observer is proposed for flight attitude tracking control system of 3th generation fighter with uncertainties and hysteretic nonlinearity actuators. The nonlinear disturbance observers are used to observe the uncertainties and the nonlinear part of the hysteretic without the restrictive condition that the disturbances to be observed must be slowly time varying. The first order filter is introduced from dynamic surface control to reduce complexity of the backstepping controller. It can be ensured theoretically by Lyapunov function that closed loop system is stable. Simulation results show the proposed control system deals with the problems of uncertain factors preferably and realizes robust output tracking for guidance orders.