超机动非线性自抗扰反演控制律设计

为提升建模不确定性下的超机动飞行控制性能,提出一种基于自抗扰反演的超机动非线性控制律设计方法.建立了具有大迎角特性的飞机六自由度非线性模型,通过由前至后递推的设计思想,逐步迭代设计Lypaunov函数与虚拟的控制输入量,实现强非线性飞机对象的控制.对建模不确定性给超机动控制性能带来的影响,将自抗扰控制方法中的扩张状态观测器与反演控制方法相结合,利用扩张状态观测器不依赖系统模型的特点,实时观测并补偿建模误差对飞行控制的影响.超机动数字仿真结果表明:所设计的超机动非线性控制律能够实现大迎角控制,在40%建模误差的影响下,迎角响应仍平滑稳定.基于自抗扰反演的超机动非线性控制方法具有优异的大迎角机动飞行控制性能.

An auto disturbance rejection backstepping super maneuver nonlinear control law design method

To improve the super maneuver flight control performance with model uncertainty, a super maneuver flight control law design method based on auto disturbance rejection backstepping control is approved in this paper. The high angle of attack six-DOF nonlinear airplane model is established. Based on the backsteppint design method, the steady flight control ability for nonlinear airplane model is realized. For model uncertainty, the extend state observer of the auto disturbance rejection control is used to observe the modeling error and online compensate. The super maneuver flight digital simulation results show that the controller has high angle of attack control ability with 40% model error. The auto disturbance rejection backstepping nonlinear control method has good super maneuver fight control performance.