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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2022, Vol. 43 ›› Issue (2): 325008-325008.doi: 10.7527/S1000-6893.2020.25008

• Electronics and Electrical Engineering and Control • Previous Articles     Next Articles

Prescribed performance control for morphing aerospace vehicle under mismatched disturbances

LI Xinkai1, ZHANG Hongli1, FAN Wenhui2   

  1. 1. School of Electrical Engineering, Xinjiang University, Urumqi 830047, China;
    2. Department of Automation, Tsinghua University, Beijing 100084, China
  • Received:2020-11-25 Revised:2021-01-07 Published:2022-03-04
  • Supported by:
    National Natural Science Foundation of China (51967019, 52065064); Tianshan Cedar Program of Xinjiang Uygur Autonomous Region (2020XS03); Tianshan Youth Program of Xinjiang Uygur Autonomous Region (2019Q064, 2020Q066)

Abstract: The semi-tilt-rotor morphing aerospace vehicle is susceptible to mismatched disturbances and subject to performance constraints. To overcome these problems, a mismatched/matched disturbance observer based on the composite Immersion and Invariance (I&I) theory and a finite-time prescribed performance control strategy are proposed. Firstly, a mathematical model with composite disturbances is established for the morphing aerospace vehicle. Then, a composite I&I based disturbance observer is designed to estimate and compensate mismatched/matched disturbances by introducing the finite-time dynamic scaling technique and supervision factor. Finally, a novel finite-time performance function is constructed with the dynamic sliding mode surface as the performance constraint. The function is combined with the barrier Lyapunov function to characterize the steady-state and transient performance of the system. The effectiveness and superiority of the proposed method are verified by theoretical and simulation results.

Key words: morphing aerospace vehicle, mismatched disturbance, immersion and invariance, finite-time dynamic scaling factor, prescribed performance, barrier Lyapunov function

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