Study on Spacecraft Ultra-stable Platform Control for Tai Chi Mission Based on LTV-MPC

In the constellation link acquisition stage, the Spacecraft Ultra-stable Platform becomes the guarantee of high-precision constellation link capture and tracking. It can not only meet the requirements of high-precision displacement measurement accuracy but also enable the interferometer to operate in a complex space environment. Therefore, it is necessary to design a stable pointing control algorithm, in this paper, a transformed min-max MPC method is implemented for the Tai Chi space mission, as a technology suitable for this application, min-max MPC method can systematically consider instruction saturation, state constraints, and obtain the optimal control sequence of input by solving and optimization problems online. The simulation shows that the control parameters meet the requirements of the Tai Chi plan.