Attitude Feedforward Compensation Control for Multistage Satellite with Scanning Mechanism

Abstract

In this paper, a multi-step prediction feed-forward compensation attitude control method based on the conservation of angular momentum is designed for multistage satellite with a two-dimensional scanning mechanism. Firstly, the dynamic model of multistage satellite with a scanning mechanism is established by the Newton-Euler method. Secondly, a multi-step prediction feedforward compensation method based on the conservation of angular momentum is proposed for the discrete multistage control system to solve the control period mismatching and the measurement delay. Finally, the numerical simulation shows that the control method proposed in this paper improves the attitude stability and pointing accuracy of multistage satellite by 3-4 times.