Satellite Attitude Control Via Magnetorquers Using Switching Control Laws

Abstract A new approach to autonomous magnetic control of polar-orbiting, nadirpointing momentum bias spacecraft is presented in this paper. It is shown that the dynamics with magnetic control is periodically time variant system. In term of the concept of block controllable form, a periodically time variant sliding surface is developed in order to ensure the stability of the system. Switching control laws are designed for physical magnetorquer. Simulation results are given