Abstract: A new coupling analysis method is proposed to solve the problem of coordination in the flight control system of hypersonic vehicle, which is used to study the coupling interconnection of the attitude dynamics for hypersonic vehicles, and a coordination controller is designed. Firstly, the attitude dynamic characteristics of a hypersonic vehicle is studied. Secondly, according to the coupling characteristics, a novel coupling analysis method based on the attitude dynamical equation is proposed to describe the coupling relationships among the attitude variables. Then, combining with the dynamical matrix, a coordination controller is designed based on hierarchical sliding mode control method to deal with the strong coupling problem between the control surfaces.Finally, the asymptotic stability of the closed loop system is proved by using Lyapunov theory, and the simulation results are given to verify the effectiveness of the proposed method, and the coordination control of attitude is realized.

Key words: dynamical equation, coordination control, hypersonic vehicle, coupling analysis