Model Evolution Approach of Digital Twin for Spacecraft Control System

Digital twin technology has currently received widespread attention in aerospace field, and is applied in scenarios such as spacecraft design, simulation, operation and maintenance. Compared with traditional simulation, the most significant feature of digital twin is that it can make the model evolve continuously in operation through virtuality-reality interaction, so as to keep consistent with physical entity. In order to meet the high reliability requirements of engineering applications, digital twin for spacecraft control system is constructed in this paper which has high-precision and evolvable characteristics. Multiple typical modeling problems of digital twin for spacecraft control system are proposed with the consideration of model evolution, such as dynamics modeling, orbit prediction modeling, sensor modeling, active component modeling and electromechanical component modeling. In response to these problems, model evolution approaches are introduced to illustrate the functions in various scenarios, providing feasible solutions for precise modeling and model evolution of digital twin for spacecraft control system.