摘要
可重组制造系统(Reconfigurable manufacturing system,RMS)可根据市场变化进行组态调整和组元升级,系统的建模与分析方法必须能适应上述特点。提出基于扩展随机Petri网(Extended stochastic Petri nets,ESPN)的模块化建模方法,将RMS不同的加工资源对应于相应的ESPN基本模块,并通过过渡变迁合成ESPN模型,该模型能适应任意分布的制造系统,可更加精确地反映生产过程。在此基础上采用基于行为表达式的分析方法,得到系统性能指标,该分析方法可不必画出可达图而直接得到系统性能关系函数,使分析过程更加直观、简洁。可重组电动机生产线的实例证明了该建模与分析方法的有效性。
Reconfigurable manufacturing system（RMS） emphasizes quick reaction to market changes, whose components are reconfigurable structures. The modeling and analysis of such system are extremely difficult to develop. A modular modeling approach based extended stochastic Petri nets（ESPN）is preseated, which facilitates the reconfigurable processing modeling and adapts the arbitrary distributions manufacturing system accurately. The RMS model is described by connecting a set of basic modules that are designed with respect to different resources and reconfigurable processing of operations; Their connection method is also provided. Furthermore, the analysis of ESPN model based on behavior expression is presented, and the performance measures of RMC are computed such as production rates versus the number of standby machines, part type mix ratio, and rump-up time. In addition, the relationship function of performance can be easily obtained without the reachability graph of Petri nets. Thus, the analysis process is simple and straightforward. An example of a DC motor reconfigurable production line is presented to illustrate the effectivity of the methodology.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2006年第12期224-231,共8页
Journal of Mechanical Engineering
基金
上海市'十五'重点科技攻关项目(031111002)
高等学校博士学科点专项科研基金(20040247033)
上海市基础研究重点项目(05JC14060)资助。
关键词
可重组制造系统
扩展随机Petri网
行为表达式
建模
性能分析
Reconfigurable manufacturing system Extended stochastic Petri nets Behavior expression Modeling Performance analysis
