Dynamic Modeling and Control of Flexible Satellite with Tracking Device

This paper focuses on the dynamic modeling and control of a complex satellite with two solar panels and a two-dimensional tracking device. For the modeling problem, the dynamical model of satellite is based on Lagrange equation and hybrid coordinate method, taking into account the flexible characteristics of the solar panels and the rotation characteristics of the tracking device. To identify the parameters of the actual system, the recursive least squares method and observer/Kalman filter identification algorithm are proposed to solve the rigid and flexible parameter identification problem. For the attitude control problem of the complex satellite, this paper proposes a sliding mode controller based on neural network considering that the-parameters may change when the satellite is actually in orbit. The stability of the controller is proved by the Lyapunov theory. Simulation results show that the identification method and the designed attitude controller have good effect.