Research on Cooperative Control Method of Large Flexible Attachment and Spacecraft Platform

In order to solve the problem of large disturbance of large flexible accessories and large error of platform attitude control when the large flexible accessories and spacecraft platform maneuver at the same time, a collaborative control method based on feedforward compensation and interference constraint is proposed. The accessory pointing control and platform attitude control are designed for bandwidth isolation, and appropriate feedforward compensation is added to reduce mutual influence and establish mutual interference constraint conditions. The polynomial trajectory planning design greatly improves the control accuracy during maneuvering. To solve the problem of large amplitude and slow attenuation of flexible attachments during rate damping, a rate damping control method based on input molding is proposed. The amplitude of the attachment approaches zero at the end of the rate damping. The mathematical simulation results show that the cooperative control method based on feedforward compensation and interference constraint can effectively improve the attitude control accuracy and the pointing accuracy of flexible accessories during maneuvering. The algorithm is simple and suitable for on-orbit real-time calculation of satellite-borne computer, and has important engineering application value.