关键词: 离散串联生产系统, 物理与信息匹配度, 时间Petri网, 极大代数, 生产组织方式

Abstract: Aiming at the mismatch phenomena of information and physical processes exist in production system under ERP-MES environment,oriented to the future highly integrated physical information system,the matching mechanism of physical and information processes in discrete series production system had been researched after defined information transmission processes to virtual manufacturing processes.The (max,+) linear system models were constructed to describe the interaction processes of information and physical processes based on time Petri net and max-plus theory.The key indicator,waiting time of products in system was calculated to measure the matching degree.The matching degree with push mechanism or pull mechanism were analyzed through a case study,and the production parameters sensitivity was studied as well.The research results revealed that the matching degree was the highest if the production system had been in “Pull-Pull” mode,while it was the lowest if it had been in “Push-Pull” mode.The production system should reform production logistics according to information transmission mechanism by taking process equilibrium seriously,and improve the consistency of operating parameters,which were benefit to improve the matching degree of physical system and information system.

Key words: discrete serial production system, physical and information matching degree, time Petri nets, max-plus algebra, production organization mode