Abstract: As a kind of deeply networked embedded system, the Cyber-Physical system(CPS) has been characterized by the joint dynamics among computation, and heterogeneous composition, multi-scale fusion between computing process and physical process etc. It is inadequate and difficult for the single model design methods for the traditional embedded computing system to adapt to the requirements of CPS modeling and simulation. In the process of design, development and simulation, the CPS often needs to combine multiple design models or to use the modeling language to describe the entity of the computing domain and physical domain. Towards the computing-physical depth fusion of in the CPS, based on the analysis of the demand and feasibility of the computing model and physical model collaborative development in the CPS, this paper use the unified modeling language(UML) model and Simulink model as the computing process and physical process modeling method separately, studies the structure mapping and behavior mapping between continuous time model and discrete event model. An approach to the transformation between the Simulink model and the UML class diagram and activity diagram is presented and verified by ATLAS transformation language(ATL) technology to realize the conversion rules.

Key words: embedded systems, computing-physical integration, model transformation, simulation modeling, unified modeling language