Switched Control of Hypersonic Vehicle based on Threshold Event-triggered Mechanism

This paper investigates a disturbance attenuation control method for hypersonic vehicle switching control based on threshold event-triggered mechanism. Firstly, the dynamics model and parametric model of hypersonic vehicle are given. Then, the error of switching model control is pre-processed based on the threshold event-triggered mechanism. According to the processing results, an adaptive controller is designed by introducing a threshold event-triggered mechanism to reconstruct error signal. Because there is switching control in the system, according to the disturbance generated at the switching place, the threshold event-triggered mechanism is set to attenuated the disturbance. Compared with traditional switching control, disturbance attenuation threshold event-triggered control has less disturbance at switching. An adaptive control law based on back-stepping method is designed for the control system, and the error realization is uniformly ultimately bounded. Finally, an adaptive control parameter updating law is proposed to make the velocity loop and altitude loop of hypersonic flight vehicle (HFV) track the given reference signals. Lyapunov stability theory proves the stability of the control system, and simulation verifies its effectiveness.