Inter-Satellite Laser Communication Tracking System Based on Digitally-Driven Stepping Motors

With the increasing deployment of large low Earth orbit (LEO) satellite constellations, inter-satellite laser (ISL) communication has emerged as a key technology to enhance satellite network efficiency. However, the traditional process for establishing ISL links on-orbit involves significant manual adjustments, resulting in inefficiencies. This paper proposes a digital twin technology for an inter-satellite laser communication tracking system that utilizes digitally-driven stepping motors for enhanced precision and efficiency in laser link establishment. Simscape is used to create an integrated model, combining acquisition control programs, drive circuits, and stepping motors, enabling accurate simulation of dynamic system behavior. This method accurately simulates the dynamic performance of the tracking system, offering valuable simulation support for efficient laser link establishment in orbit, improving test efficiency, and accelerating the deployment of LEO constellations.