摘要
以发动机装配系统为研究对象,提出了面向对象的知识Petri网建模方法(Object-oriented Knowledge Petri Net,OKPN),以实现对发动机装配系统的分析和优化的支撑。论文从系统建模角度出发,采用面向对象的思想,将发动机装配系统抽象成若干个功能关联的装配单元,并以装配单元为基本建模对象,构建了发动机典型装配单元OKPN模型。在此基础上,将各装配单元进行抽象和封装,根据各装配单元之间工艺关系,建立装配单元之间的消息传递机制,构建能够反映装配系统运行流程的发动机装配系统OKPN模型,该模型具有模块化和可重用性等特点。最后,以某乘用车发动机装配系统为对象进行实例验证,证明了该方法的有效性和可行性。
By taking an engine assembly system as the research object,an Object-oriented Knowledge Petri Net modeling approach was proposed to support analysis and optimization of engine assembly system. Firstly,from the attitude of system modeling,and by adopting the idea of object oriented,abstract Engine Assembly System into several assembly units functionally connected,then establish engine typical assembly unit as OKPN model by these basic units. On the basis of above steps,abstracting and encapsulating every assembly unit. establish information transmission mechanism according to their technology connection,build the OKPN model for engine assembly system. Based on the OKPN modeling technology,the process of engine assembly system was expressed. The OKPN model also has the characteristics of good modular and reusable. Finally,a case of the OKPN model of a passenger car engine assembly system was given to demonstrate the effectiveness of this model.
出处
《组合机床与自动化加工技术》
北大核心
2015年第10期145-149,153,共6页
Modular Machine Tool & Automatic Manufacturing Technique
