Variational method based robust adaptive control for a guided spinning rocket

• 来源期刊: 中国航空学报（英文版）
• 年，卷（期）: 2021,（3）
• 页码范围: 164-175
• 页数: 12页
• 语种: 英文

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 aerody-namics parameters and wide flight envelop. First, a coupled nonlinear six-degree-of-freedom equa-tion 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 varia-tional method to achieve fast adaption and maintain bounded tracking. The stability of the result-ing 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 tra-jectory to show the robustness and adaptability of the proposed method with respect to time-varying uncertainties and unmodeled dynamics.