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针对高超声速飞行器控制系统设计,提出一种基于干扰观测器的鲁棒反演控制器设计方法。采用反演控制方法分别设计速度和高度控制器。引入滑模微分器设计虚拟控制量的导数求解器,避免了传统反演控制“微分项膨胀”问题。为增强控制器的鲁棒性,设计一种非线性干扰观测器对模型不确定项进行自适应估计和补偿。通过数值仿真表明,该控制器能够保证对速度和高度参考输入的稳定跟踪。
Aiming at the design of hypersonic vehicle control system, a disturbance observer-based robust inversion controller design method is proposed. The inversion control method is used to design the speed and height controller respectively. The introduction of sliding mode differentiator design of virtual control of the derivative solver avoids the traditional inversion control “differential term expansion ” problem. In order to enhance the robustness of the controller, a nonlinear disturbance observer is designed to adaptively estimate and compensate the uncertainty of the model. The numerical simulation shows that the controller can guarantee the stable tracking of speed and altitude reference input.