Attitude Control of Asymmetric Satellites on Polar Near-Circular

In this paper, a general problem about the attitude dynamics and control of asymmetric satellites is discussed. Due to the asymmetric structure, the properties of such satellites are different from symmetric ones. Perturbation moments accumulate with time, and the attitude angles increase periodically with time. Furthermore, chaos could be happened. Traditional linear controller can not compensate enough for asymmetric satellite when the mission is complex, especially in maneuver missions. Thus nonlinear control method is required to solve such problem in large scale. A feedback linearization method, one robust nonlinear control, is introduced and applied to asymmetric satellite in this paper. Some simulations are also given and the results show that feedback linearization controller not only stabilizes the system, but also exempt the chaos in the system.