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针对高超声速飞行器非线性动力学系统中存在的高度非线性、多变量耦合及参数不确定等特点,利用非线性干扰观测器对各种干扰的逼近特性,结合反演滑模控制,设计了一种飞行器反演滑模控制器。该方法首先利用干扰观测器观测出系统的干扰,未观测出的部分干扰使用反演滑模控制进行补偿,避免了累积误差,实现对制导指令的鲁棒输出跟踪,并证明了系统稳定性。仿真结果验证了该方法能较理想地观测干扰,保证系统良好的鲁棒性。
In view of the characteristics of hypereutectic nonlinear dynamics such as highly nonlinear, multivariable coupling and uncertain parameters, the approximation of nonlinear disturbance observers to various disturbances is combined with inversion sliding mode control to design a Aircraft Inversion Sliding Mode Controller. The method first observes the interference by the disturbance observer, and the unobserved disturbance is compensated by the inversion sliding mode control, which avoids the accumulated error, and realizes the robust output tracking of the guidance instruction, and proves the stability of the system. The simulation results show that this method can observe the interference more ideally and ensure the robustness of the system.