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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问题,设计了一种基于鲁棒滑模观测器的双环滑模控制方法。该方法首先利用设计的鲁棒滑模观测器在线估计系统的不确定性及未知干扰,在此基础上,通过设计滑模变结构控制器来实现对不确定性的抑制控制,从而实现对制导指令的鲁棒输出跟踪。仿真结果验证了该方法能较理想地估计干扰,保证系统良好的鲁棒性。
Aiming at the problems of hypereutectic nonlinear dynamic system such as highly nonlinear, multivariable coupling and uncertain parameters, a double loop sliding mode control method based on robust sliding mode observer is designed. In this method, the robust sliding mode observer is firstly used to estimate the system uncertainties and unknown disturbances on-line. On the basis of this, sliding mode variable structure controller is designed to realize the control of the uncertainties, Directive robust output tracking. The simulation results show that this method can better estimate the interference and ensure the robustness of the system.