Overload Tracking Control for Hypersonic Flight Vehicle with Coupling Coordination

This paper proposes a prescribed performance control (PPC) method for the overload tracking of hypersonic flight vehicle (HFV), meanwhile the coordinated control is designed under the flight-propulsion coupling. Considering the overload tracking requirements in the actual application, a second-order system which considers the overload as the system output is established, furthermore the PPC is utilized to limit the overload tracking error so that the safety bounds can be guaranteed. Considering the coupling between the flight attitude and propulsion system, a dynamic coupling index (DCI) is defined, furthermore the controller is modified to weaken the coupling effects. The stability of both velocity and overload control is proved via Lyapunov analysis. Simulation results verify that the designed controller can improve the velocity control performance and guarantee the overload prescribed-performance tracking.