Abstract: Lingxi03 satellite developed and launched by Galaxy Aerospace is the first flat panel satellite with a flexible solar wing of more than 20 square meters. Compared with traditional satellites, the vibration of flexible solar wings will bring low frequency disturbance to the attitude control system. Additionally, the satellite adopts a single wing asymmetrical structure to make the interference torque more than 50 times that of conventional satellites. According to the characteristics of the structure and layout of the Lingxi03 flat panel satellite, an attitude controller combining PIDT and structural filter is designed, which is based on frequency band isolation. The response at the modal frequency of the solar wing is targeted to suppress the vibration of the solar wing to ensure the control accuracy and suppress the vibration of the solar wing. The simulation results show that the controller can achieve the attitude control accuracy of 0.03°(3σ) and the stability of 0.005(°)/s (3σ).

Key words: flat panel satellite, flexible solar wings, interfering torque, PIDT, structural filtering