Acquisition, Scanning and Control Technology for Inter-satellite Laser Communication

Due to the complex space environment, it is very difficult to establish communication links between satellites efficiently and quickly. Considering laser power limitation and environmental conditions, the gazing/scanning method is selected to achieve inter-satellite laser communication. Firstly, this paper establishes the theoretical model of the field of uncertainty (FOU) and analyzes the capture probability. In order to scan the entire FOU, the scanning step model and the spiral scanning paths are studied. Then, the model of the gimbal mirror is established and different types of scanning paths are selected for scanning simulation. Finally, the active disturbance rejection control (ADRC) and proportional integral (PI) control are designed for the gimbal mirror, respectively. The simulation results validate that the control performance of ADRC is better than PI controller.