关键词: 复杂航天器, 虚拟样机, 模型, 描述, 集成

Abstract: To realize the description and integration of heterogeneous models under mechanical and signal interconnections in complex spacecraft virtual prototype model, a categorized model description method was proposed according to interconnection types. Model description specification concerning spacecraft dynamics and onboard system characteristics were established. Corresponding model integration methods were designed to support categorized model description and to obtain higher simulation accuracy. Dynamic models constrained by mechanical interconnections were integrated by dynamic equation formulation while discretization of continuous models connected by signal interconnections was realized with quantized state integration. A simulation coordination engine was devised to coordinate the runtime behavior of quantized state continuous model and discrete models, which avoided the error induced by data transfer during simulation and guaranteed the modular structure of simulation models. Modeling and simulation platform for complex spacecraft virtual prototype was constructed with the model description method and model integration algorithms proposed. Effectiveness of simulation algorithm was validated through simulation.

Key words: complex spacecraft, virtual prototype, models, description, integration