The Design And Realization Of PDM System Oriented Product Design

Although CAD technology extensively used has improved the efficiency of enterprises drawing and design, it appears some problems such as low level document sharing, finding valid information difficultly and guaranteeing document's security hardly etc. All of the problems result from lacking of effective management of product data and process. Those have influenced the design efficiency seriously. Product data management (PDM) is just a new technology of solving problems described above. It grows up with the environment of modern product development. Based on the analysis of enterprise's demand and the design target with the PDM technology, this paper presents an overall layered framework of the system and details the analysis of system's modular structure and functions. Finally it realizes some modules of the system such as user authorization management, document management, project management and so on.The module of user authorization management analyzes the commonly used privileges access control models in the management information system. It uses role-based access control model and resource classification method to achieve an effective and simple method. It uses group-based user management scheme to reduce the complexity of the authorization and improve the efficiency of management. The module of document management details the design and implementation analysis of static and dynamic management functions included basic management, storage management transmission management and version management etc. Based on these functions above, the system achieves some commonly used operations such as document signed in and signed out, import and backup, search etc. The module of project management explains the definition and function of it. It analyzes the architecture of task management based on work-flow, and implements the automatic execution and monitoring of project tasks. Simultaneously the structure management is realized based on the parts library. These modules' functions meet the basic needs of enterprise, and have been successfully used in the enterprise.This paper is based on the system named "product design management system" which has brought into practice and run in the enterprise. The system described in the paper has been redesigned by further consideration of the system generic and the function integrity. Through using object-oriented design methodology and software development ideology such as design pattern, it realized with more perfect feather. The system is constructed on the platform of Netbeans RCP development and used plug-in mechanism, so it has better independence and scalability of modules. The system can reduce redundancy of enterprise information, enhance information sharing and improve design efficiency, so it has good practicability.