可重构制造系统监督控制器的自动重构  

Automatic Reconfiguration of Supervisory Controllers for Reconfigurable Manufacturing Systems

作　　者：李俊[1] 戴先中[1] 孟正大[1] 

机构地区：[1]东南大学自动化学院,南京210096

出　　处：《自动化学报》2008年第11期1337-1347,共11页Acta Automatica Sinica

基　　金：国家重点基础研究发展计划 (973 计划) (2002CB312204) 资助~~

摘　　要：提出了基于改进的网重写系统(Improved net rewriting system,INRS)的可重构制造系统(Reconfigurable manu-facturing systems,RMS)Petri网监督控制器的自动重构方法,以快速适应由市场需求变化所引起的制造系统构形的频繁变化.INRS解决了网重写系统存在的问题,可动态调整给定Petri网模型的结构而不改变其行为属性.以集合和图的组合形式定义了RMS的构形,并提出了基于INRS的一类模块化、可重构的Petri网控制器的设计方法.针对这类Petri网控制器,提出了基于INRS的自动重构方法.方法可将RMS构形的变化转变为INRS的图重写规则,并作用于当前Petri网控制器,使其快速、自动地重构为所求的新控制器.所提出的Petri网控制器的设计与重构方法,均从理论上保证了结果的正确性,免校验.仿真研究验证了方法的有效性.This paper presents an improved net rewriting system （INRS） based method for automatic reconfiguration of Petri net （PN） supervisory controllers for reconfigurable manufacturing systems （RMS） to adapt rapidly to frequent changes in the manufacturing system configurations driven by market changes. INRS addresses the problems of net rewrit- ing systems and can dynamically change the structure of a PN model with preserving its original behavioral properties. An RMS configuration is formally defined by incorporating the formalisms of set and graph. A design method for a class of modular and reconfigurable PN controllers is presented with an approach of INRS. Subsequently, an INRS-based method for automatic reconfiguration of this class of PN controllers is proposed. Using the reconfiguration method, changes in an RMS configuration can be automatically transformed into graph rewriting rules of INRS; by applying the rules to the existing controUer, it will be reeonfigured into the needed one. The resultant PN controllers obtained by both the design and reconfiguration methods are guaranteed to be valid in theory, without the need of verification. Simulation results show the validity of the presented methods.

关 键 词：可重构制造系统 PETRI网 监督控制器 重构 设计 

分 类 号：TH164[机械工程—机械制造及自动化]