Research On Decision Support System Based On Virtual Reality Simulation

Computer decision support system(DSS), which is a computer system employed to provide sufficient information and communication with user in the whole process of decision-making, including data accessing, information processing, scheme evaluating, can assist the user to make a decision scientifically. In the condition of solving practice problems, users often need to obtain a designed scheme's evaluation and optimization information to support decision-making. DSS based on virtual reality simulation provides decision maker information to support decision-making by simulating a scheme and analyzing the variable data which is carried from simulation. So, the decision maker can achieve qualitative and quantitative information to support decision-making from the integrated decision support system. Furthermore, decision maker can modify the designed scheme conveniently by the interactive of virtual reality simulation environment after getting the scheme's decision-making information, and can continue simulating and analyzing the new scheme till to get a better scheme.Firstly,this paper describes the structure of decision support system based on virtual reality simulation after analyzing the system's function and dataflow, and the modules which the system is made up of are expatiated. Furthermore, the key technology of realizing the system is discussed, including design data interface for decision-making in the simulation object and the communication method between simulation and decision-making by multi-thread. Secondly, decision model's representation and management is studied. By comparing methods and ideas of model representation, this paper represents decision model with object-oriented method and designs the class structure of decision model. In addition, model base management system is accomplished by DBMS, the process of data and method's match at the time of creating model is expiated.Thirdly, Based on OpenGL, the key technology of constructing the virtual reality simulation environment is studied, including virtual scene's constructing, kinetics simulation arithmetic, object-oriented discrete event simulation frame. Finally, the decision model for distribution of job shop is constructed, and based on OpenGL, a prototype system for distribution of job shop is developed under win2000 system by VC++6.0 and ACCESS 2000. An example of using the prototype system is introduced also.