The Digital Mulit-discipline Modeling Method of Space Craft Based on Modelica

Space craft engineering is a complex unmanned system with large scale, and there are couplings among the subsystems, so multi-disciplinary modeling and simulation in every development stage is necessary. In order to study how to achieve spacecraft multi-disciplinary modeling and simulation quickly, using Modelica to model the key equipment of subsystems, and accomplish the Modelica model libraries, refining a modeling method: a multi-disciplinary parallel simulation framework is proposed to solve the problem of low simulation efficiency caused by large models in multidisciplinary unified modeling and simulation of complex systems. On base of the modeling method, simulating the early partial elimination, the correctness of the model is verified. This modeling method could be used to verify the correctness of early programs of unmanned system.