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Acta Aeronautica et Astronautica Sinica ›› 2024, Vol. 45 ›› Issue (9): 529088-529088.doi: 10.7527/S1000-6893.2023.29088

• Articles • Previous Articles     Next Articles

Gain adaptive multi-mode switching control for coaxial high-speed helicopter

Fengying ZHENG1, Zhimin SHEN1, Yaqin LI1, Kaizhao XU1, Xinhua WANG2()   

  1. 1.College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing  210016,China
    2.College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing  210016,China
  • Received:2023-05-31 Revised:2023-07-24 Accepted:2023-10-07 Online:2024-05-15 Published:2023-10-24
  • Contact: Xinhua WANG E-mail:xinhuawang@nuaa.edu.cn
  • Supported by:
    National Natural Science Foundation of China(61803200);Key Laboratory Fund of Equipment Pre-research(6142220180304)

Abstract:

To solve the problem of nonlinear strong-coupling multi-mode switching stability control of coaxial twin-rotor high-speed helicopter, a average dwell time switching control strategy is proposed based on gain adaptivity. According to the dynamic model of coaxial high-speed helicopter, the control characteristics of its rudder surface are analyzed,and a multi-mode gain adaptive switching control structure is constructed. A non-affine nonlinear small gain high frequency filter adaptive law is proposed. The uncertainty of multi-mode switching is quickly compensated and high-frequency noise is reduced to ensure the steady-state and transient-state performance of the system. Then, a switching submodel set with uncertainties is established, and the average dwell time switching control law is designed based on adaptive gain. The control stability of the closed-loop system is proved based on the small gain theorem and Lyapunov stability theory, which ensures the stable switching control of the coaxial high-speed helicopter in low-speed-transition-high-speed full mode. Finally, a comparison with the existing control methods verifies the feasibility and effectiveness of the proposed control strategy.

Key words: coaxial high-speed helicopter, nonlinear small gain, adaptive control, average dwell time, switching control

CLC Number: