Variational method based robust adaptive control for a guided spinning rocket  

作　　者：Zhongjiao Shi Liangyu Zhao Zhijie Liu 

机构地区：[1]School of Aerospace Engineering,Beijing Institute of Technology,Beijing 100081,China [2]School of Automation and Electrical Engineering,University of Science and Technology Beijing,Beijing 100083,China

出　　处：《Chinese Journal of Aeronautics》2021年第3期164-175,共12页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 11532002)。

摘　　要：In this paper,a robust adaptive controller is designed for a guided spinning rocket,whose dynamics presents the characteristics of pitch-yaw cross coupling,fast time-varying aerodynamics parameters and wide flight envelop.First,a coupled nonlinear six-degree-of-freedom equation of motion for a guided spinning rocket is developed,and the lateral acceleration motion is modeled as a control plant with time-varying matched uncertainties and unmodeled dynamics.Then,a robust adaptive control method is proposed by combining Bregman divergence and variational method to achieve fast adaption and maintain bounded tracking.The stability of the resulting closed-loop system is proved,and the ultimate bound and convergence rate are also analyzed.Finally,numerical simulations are performed for a single operating point and the whole flight trajectory to show the robustness and adaptability of the proposed method with respect to timevarying uncertainties and unmodeled dynamics.

关 键 词：Autopilot design Guided spinning rockets Robust adaptive control Second-order adaptive law Variational method 

分 类 号：TJ7[兵器科学与技术—武器系统与运用工程]