TY - JOUR
T1 - Variational method based robust adaptive control for a guided spinning rocket
AU - Shi, Zhongjiao
AU - Zhao, Liangyu
AU - Liu, Zhijie
N1 - Publisher Copyright:
© 2020 Chinese Society of Aeronautics and Astronautics
PY - 2021/3
Y1 - 2021/3
N2 - 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 time-varying uncertainties and unmodeled dynamics.
AB - 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 time-varying uncertainties and unmodeled dynamics.
KW - Autopilot design
KW - Guided spinning rockets
KW - Robust adaptive control
KW - Second-order adaptive law
KW - Variational method
UR - http://www.scopus.com/inward/record.url?scp=85099254267&partnerID=8YFLogxK
U2 - 10.1016/j.cja.2020.09.047
DO - 10.1016/j.cja.2020.09.047
M3 - Article
AN - SCOPUS:85099254267
SN - 1000-9361
VL - 34
SP - 164
EP - 175
JO - Chinese Journal of Aeronautics
JF - Chinese Journal of Aeronautics
IS - 3
ER -