Attitude Control of Hypersonic Vehicle Based on Improved Fast Terminal Sliding Mode
Aiming at the attitude control problem of hypersonic vehicle with complex disturbance,an improved fast terminal sliding mode control method is designed.The vehicle model under the influ-ence of elasticity is established,the attitude angle error vector is defined,the error dynamic equation of the reentry model is obtained.Then a third-order sliding mode observer is designed to estimate the complex disturbance.The hyperbolic tangent function is introduced to improve the terminal sliding mode control method,and the stability of the proposed strategy is proved.Finally,the system can quickly track instructions with high precision through simulation experiments,and the effectiveness and superiority of the strategy are verified.
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