Research on Satellite Attitude Control Scheme with Multi-Source Disturbance Suppression

• Main Authors: Li, Mingqun, Lei, Yongjun, Zhang, Junling, Mu, Xiaogang
• Format: Conference Proceeding
• Language: English
• Subjects: Attitude control; multi-source disturbance; Payloads; satellite; Satellites; Software; Software algorithms; Stability analysis; suppression of disturbance; Torque
• ISSN: 2688-0938
• DOI: 10.1109/CAC59555.2023.10450685

The problem of satellite attitude control under multiple disturbance sources is studied in this paper. Usually, satellites carry multiple payload devices, and each payload has different start-up times, operating hours, and motion characteristics during operation, resulting in various disturbances to the satellite's attitude. The paper first analyzes the motion characteristics under different loads and sorts out two typical disturbance torques. For the constant disturbance torque, a state observer based on satellite attitude dynamics is proposed to estimate the disturbance torque. Periodic disturbance signals are further divided into two categories. For periodic disturbance torques with known parameters, a disturbance torque fitting feedforward compensation method considering actuator delay is proposed. For periodic disturbance torques with unknown parameters, an adaptive disturbance suppression method based on Lyapunov principle is proposed that can identify parameters. The paper further proposes a solution for attitude control when the satellite is in orbit and subject to multiple sources of disturbance at the same time. Finally, mathematical simulation was conducted on a satellite, and the results showed that the proposed control scheme can effectively suppress various disturbances. After applying the proposed scheme, the suppression of disturbance effects exceeded 90%, verifying the effectiveness and practicality of the proposed scheme.