摘要
针对高超声速飞行器动态模型中存在的非匹配不确定性,提出了一种基于Lyapunov方程的滑模变结构控制方法。首先建立了具有非匹配干扰的面向跟踪控制的系统模型,通过引入非线性扰动观测器来估计非匹配干扰;其次提出了由速度子系统和高度子系统的扰动估计值构成的新的滑模面,并导出了针对非匹配干扰的滑模控制器。最后基于Lyapunov方程的稳定性判据出发证明了系统的稳定性,从中得到了2个子系统的跟踪误差精度和非匹配干扰的估计误差之间的关系。仿真结果表明该方法的正确性。
A sliding mode variable structure control method based on the Lyapunov equation is proposed for the non-matching uncertainty in the dynamic model of hypersonic vehicles.A tracking-oriented control system model with non-matching disturbances is established to estimate non-matching disturbances by introducing a nonlinear perturbation observer.A new sliding-mode surface consisting of the perturbation estimates of the velocity subsystem and the altitude subsystem is proposed,and a sliding-mode controller is derived for the non-matching disturbances.The stability of the system is proved based on the stability criterion starting from the Lyapunov equation,from which the relationship between the tracking error accuracy of the two subsystems and the estimation error of the unmatched disturbance is obtained.The simulation results show the correctness of the method.
作者
郭建国
杨胜江
鲁宁波
王国庆
GUO Jian-guo;YANG Sheng-jiang;LU Ning-bo;WANG Guo-qing(Northwestern Polytechnical University,Institute of Precision Guidance and Control,Shaanxi Xi’an 710072,China;China Academy of Launch Vehicle Technology,Department of Research and Development,Beijing 100076,China)
出处
《现代防御技术》
北大核心
2021年第6期1-8,共8页
Modern Defence Technology
基金
国家自然科学基金(61973254)。
关键词
高超声速飞行器
非匹配干扰
滑模控制
干扰观测器
稳定性
hypersonic vehicle
mismatched disturbances
sliding mode control
disturbance obser-ver
stability
