Research On The Multi-Agent Based Distributed CAPP And Process Information Management

As a crucial technology of Computer Integrated Manufacturing System (CIMS), Computer Aided Process Planning (CAPP) is the bridge between Computer Aided Design (CAD) and Computer Aided Manufacturing (CAM). Meanwhile, it is an important foundation for building the overall information model of manufacturing of engineering product. Manufacturing conducted by modem enterprise requires development in network, intelligence, distributing based on information sharing. It is one of the technology foundation of developing contemporary manufacturing system based on network, intelligence and information sharing, which studies the application of process planning under environment of distributed manufacturing. The dissertation is the first practice to study working method and principle of multi-agent based distributed CAPP and process information management in network environment in enterprise at home and abroad, which is suitable for the development requirements of process planning and has an important theoretical value and practical significance. The key study contents and conclusions in the dissertation are as follows: 1. Object-oriented technology was imported in the field of process planning. Based on the analysis to the field of process planning, a method was proposed to identify process objects. Most of process objects with their attributes and methods were identified and recorded. The author marked up every subsystem according to the structuring of objects and different subject, and built process object class library preliminarily. 2. Object-oriented analysis to process planning was studied to firstly put forward the basic construction model of object-oriented CAPP system, which includes object-oriented part information model, object-oriented knowledge expression, object-oriented decision-making mechanism and object-oriented manufacturing resource model. Those works do help to reusing software, reducing workload of system maintenance and exploitation, building software system using components. 3. A new framework of distributed CAPP system under Agile Manufacturing (AM) environment was firstly presented. In the dissertation, the author expatiated running way, software implementation technology and the mechanism of information 111 bI~W眫4~t~ management of distributed CAPP system. It will be helpful to establish the theoretical foundation of distributed CAPP system. Distributed CAPP system is integrated with the technology of CAPP, intelligence, distributed database, distributed programming and network. Distributed CAPP system is the trend of CAPP. 4. The author studied the application of agent technology in the field of process planning, and firstly presents the conception of process agent. Different process agents were identified. In the dissertation, agent-based information process model, construction method and network distributed structure of agent-based process planning system were discussed. On the basis of above work, the author preliminary built the framework of agent-based process planning system. Agent-based process planning system will reduce the complexity of system construction and raise aggregation of knowledge, efficiency of decision-making and running speed of system. Besides, their knockdown system structure is easy to be expanded and maintained. Furthermore, it is more practical.