Reentry Attitude Control of Hypersonic Vehicle based on Sliding Mode Active Disturbance Rejection

Abstract

Aiming at the attitude control problem of hypersonic vehicle in reentry phase, this article puts forward a control scheme based on the integration of hypersonic super-twisting sliding mode control (STSMC) and active disturbance rejection control (ADRC). Considering the uncertainty of the model and the external disturbance, a 6-dof dynamic model of hypersonic vehicle is established. Based on the linearization of model feedback, evaluate the uncertainties and disturbances by an extended observer, and a control law based on super-twisting sliding mode was designed to replace the state feedback control law in the traditional ADRC method. The control moment is distributed to each actuator by generalized inverse control allocation method. Simulation consequence proved that the Sliding Mode Active Disturbance Rejection controller (SMC-ADRC) has good attitude control ability, faster convergence and stronger anti-interference performance.