Research And Development Of Multi-domain Physical System Modeling Platform Based On Modelica

The modeling and simulation technology of multi-domain physical system based on the united simulation language-Modelica has expansive development space and application foreground . The development of modeling platform of multi-domain physical system is the base of the simulation of multi-domain physical system. This paper, supported by the National 863 Project(2003AA001031), researched the problems of modeling platform of multi-domain physical system and developped a modeling platform of multi-domain physical system with essential functions-MWorks. After the functional analysis of multi-domain modeling platform based on Modelica language, the architecture with three layers based on the components was designed. With the object-oriented method and Modelica syntax, it analyzed the composition of the model of the multi-domain physical system described by the Modelica language, brought forward and realized the trifurcate tree structure of model based on sentence aggregate. Besides, the graphic objects in the module of graphic modeling were classed, abstracted, derived and realized in this paper. Based on such analysis, the system, with the technology of computer graphic transformation and XML, respectively realized the module of system library supporting model lookup function, the module of text modeling supporting highlight display and the module of graphic modeling supporting drag-and-drop modeling and hierarchical modeling. The key technology in these modules, such as the storage of model data, associated modification and orthogonal arithmetic was analyzed and realized. Finally, with the technology above and the development tools, such as BCGControlBar, VC++6.0, the modeling platform of multi-domain physical system-MWorks was developed, the functions of MWorks were introduced and the advantages compared with other congener softwares were analyzed. Besides, through the modeling instance of Robot on MWorks and the comparison with the commercial software-Dymola, the research methods in this paper were proved feasible and valid.