MANUFACTURING SYSTEM

Dong Hongzhao

(College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014)

Chen Ying

(The State Key Laboratory of Fluid Power, Zhejiang University, Hangzhou 310012)

Zhao Yanwei

(College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310014 )

Abstract:  The networked cooperative manufacture among enterprises can promote their competitive capacity and the first step is to disassemble the project into several sub-projects. There are priority constraints among the sub-projects and their completion must follow a certain time sequence. Here gives a new method to describe the constraints and calculate the exact executing time area of each sub-project. The time sequence of the sub-projects can be described by our defined before relation Rbefore coupled with both sub-relations including serial before relation Rs-before and parallel before relation Rpbefore. The backward deducing arithmetic to calculate the executing time areas of the sub-projects is raised. Moreover, the rules to determine the disassembling granularity of the project are proposed. Eventually, the practice proved that the method could effectively solve the time-sequence constraint issue of the sub-projects in the multi-agent based networked cooperative manufacturing system.

Key words: Networked cooperative manufacture  Project disassembly  Time-sequence constraint  Before relation and its sub-relations  Disassembling granularity

CLC No: TH132.4  TH166

国家863/CIMS主题(2002AA412610)和国家自然科学基金(59975079)资助项目. Received 20030408, received in revised form 20030825