Attitude tracking of rigid spacecraft based on extended state observer

Abstract

The problem of attitude control for a spacecraft model which is nonlinear in dynamics with inertia uncertainty and external disturbance is investigated in this paper. The extended state observer is applied to estimate the disturbance, by which a sliding mode controller is designed to force the state variables of the closed loop system to converge to the reference attitude states. Also, simulation results are presented to illustrate the effectiveness of the control strategy.

Research on servo valve-controlled hydraulic motor system based on active disturbance rejection control

“…Gao introduced the concept of bandwidth and proposed a linear ADRC controller, 12 which brought great convenience to the parameter tuning of the linear ADRC controller. At present, ADRC controller has been successfully used in a large number of engineering control practices, and has been initially commercialized, 13 such as ADRC controller is used for flight attitude control, 14 rock drilling robot combined with hydraulic drive control, 15 Antenna anti-wind interference servo system, 16 and so on. Zhang and Cao took the pump-motor system as the research object and proposed a fuzzy linear ADRC controller.…”