Abstract:

The control design problem is investigated for air-breathing hypersonic vehicles with non-minimum phase characteristic. Firstly, this model is separated as velocity subsystem and pitch dynamics subsystem. For the former, a dynamic inversion controller is derived. For the latter, appropriate external dynamics and internal dynamics are selected. The longitudinal pitch channel model is converted to a canonical form by coordinate transformation. The criterion of non-minimum phase property is given by the stability analysis of internal dynamics. Finally, the internal dynamic stabilization is realized by adding the state feedback of the canonical transformation in the dynamic inverse controller, and the stability of the system is proved based on the Lyapunov equation. The simulation results show that the proposed method achieves good tracking control effect and stabilizes the internal dynamics of the system effectively.