Longitudinal coordination control of hypersonic vehicle based on dynamic equation

Abstract

The complex nonlinearities of hypersonic vehicles can lead to strong couplings between variables, which will bring great challenges to flight control. For this purpose, this paper proposes a novel coupling analysis method for the longitudinal dynamics of a hypersonic vehicle, based on which a coordination controller is designed to reduce the negative effects of the couplings. Initially, according to the coupling characteristics of the hypersonic vehicle, a novel coupling analysis method based on the dynamic equations is proposed to describe the dynamic coupling relationships between variables. Then, a coordination control scheme is designed by combining sliding mode control and the dynamic coupling matrix obtained. Subsequently, 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 dynamic coupling matrix-based coordination control.

Robust fault-tolerant control design for hypersonic vehicle with input saturation and actuator faults

“…In Ref. 11, a coordination controller is designed for the longitudinal dynamics of hypersonic vehicle by combining the sliding mode control and dynamic coupling matrix obtained. In Ref.…”

“…According to the hypersonic vehicle control model, the methods can be divided into three categories as follows: the method based on the small disturbance linearization model, [4][5] linear time-varying parameters model, [6][7] and nonlinear model. [8][9][10][11][12][13][14][15] Due to the characteristics of serious nonlinearization, strong coupling, and high uncertainty, the small disturbance linearization model method is difficult to solve the complex flight characteristics of hypersonic vehicle. In Ref.…”