Abstract: Under the grand goal of “Digital China”, the current development mode of spacecraft in China is upgrading from document driven to model driven. Model based systems engineering(MBSE) is the core method guiding this development mode upgrading. One of the core contents of MBSE is the construction and operation of digital twin model. Spacecraft digital twin model consists of multiscale models, such as spacecraft system level digital twin model, subsystem level digital twin model and component level digital twin model. At the same time, the spacecraft digital twin model is also composed of multidimensional models, such as structure model, software model, circuit model and so on. How to integrate multiscale model and multidimensional model into a whole digital twin model according to certain norms has become a key research content in the field of MBSE. A universal construction method of spacecraft digital twin model is presented in this paper, and a practical scheme based on the principle of operating system is also put forward for the design architecture and principle of the general operation platform of spacecraft digital twin model.

Key words: spacecraft, MBSE, digital twin, operating system