Citation: | ZHANG Yuan, HUANG Wanwei, LU Kunfeng, et al. Modeling and finite-time control for hypersonic morphing flight vehicle[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(10): 1979-1993. doi: 10.13700/j.bh.1001-5965.2021.0701(in Chinese) |
The attitude control of hypersonic morphing flight vehicles cause problems of large uncertainties, such as time-varying parameter perturbation, difficulty in modeling deformation process, and complex "lumped disturbances". To address these problems, a control-oriented model for variable-sweep wing hypersonic flight vehicles is established, and a finite-time control scheme is proposed. Firstly, a three-degree-of-freedom model is established for attitude control, which can reflect the influence caused by deformation. Secondly, the aerodynamic characteristics of the hypersonic morphing flight vehicle in some typical states are analyzed, and a feasible method for the key aerodynamic data of continuous deformation is developed. Thirdly, a finite-time control scheme is designed for the continuously deformable vehicle, and the system stability is demonstrated. Further, the finite-time convergence filter is designed, considering the command differentiation term used in the control law. An extended state observer is also used to estimate the unmeasurable states and the "lumped disturbances". Finally, numerical simulations are performed with complex disturbances, and the results show that the proposed control scheme can solve the attitude control problem for the vehicle with complex disturbances at different deformation rates.
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