数字孪生卫星技术与工程实践

Digital Twin Satellite Technology and Its Engineering Practice

数字孪生是一种集成多物理、多尺度、多学科属性,具有实时同步、忠实映射、高保真度特性,能够实现物理世界与信息世界交互与融合的技术手段。文章给出数字孪生卫星的定义,从卫星物理实体(R-Sat)、卫星孪生体(DT-Sat)、孪生数据(DT-Data)、服务系统(DT-App)以及连接五个维度对数字孪生五维模型进行拓展,并提出了数字孪生卫星五维数据(实时数据、纵向数据、横向数据、仿真数据、融合数据)的概念。探索了数字孪生卫星未来在工程实践中需解决的关键问题,并在太阳翼子系统设计与整星热试验测温与评估等方面开展了初步的应用。

Digital twin could realize interaction and integration between physical space and virtual world,as a technology of integrating multi-physics,multi-scale and multidisciplinary attributes,characterized by real-time synchronization,faithful mapping and high fidelity,could realize interaction and integration between physical space and virtual world.In this paper,the definition of digital twin satellite is given.The five dimensions of digital twin are expanded from satellite physical entity(R-Sat),digital twin satellite(DT-Sat),digital twin data(DT-Data),service system(DT-App)and connection.The concept of digital twin satellite five-dimensional data(real-time data,longitudinal data,horizontal data,simulation data,and fusion data)is proposed.The key problems to be solved in the engineering practice of digital twin satellites in the future are explored,and the preliminary application has been carried out in the design of solar arrays subsystem and the implementation of the satellite thermal test.