高超声速飞行器二阶滑模控制器设计

摘要

The hypersonic vehicle is highly complex nonlinear system suffering from mismatched type of uncertainties caused by varying aerodynamic parameters and environmental disturbances,then a second order sliding mode controller is proposed. Firstly,the feedback linearization expression is disposed based on the hypersonic vehicle model,later the mismatched type of uncertainty caused by varying aerodynamic parameters and environmental disturbance is added into the model,then the second order sliding mode controller is designed. Finally,the simulation is conducted and the parameters uncertainties are added into the model so as to confirm the algorithm can track the command precisely with robustness. Simulation results confirm the effectiveness of the proposed second order sliding mode controller.%针对高超声速飞行器存在的自身参数摄动及外界环境干扰导致的系统不确定性特点，提出了一种二阶滑模控制器设计方法。首先对高超声速飞行器模型进行精确反馈线性化处理，在得到的线性模型中加入外界干扰及自身参数摄动带来的不确定因素；然后设计了一种二阶滑模控制器；最后进行了仿真实验，并加入不确定因素以验证系统的跟踪性和鲁棒性。仿真结果表明了该种方法的有效性。