共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
3.
阐述了电机加工系统可重组技术的构成、加工系统质量控制方法的可重组技术等,为电机生产线的改造提供了理论依据。 相似文献
4.
5.
6.
7.
基于UML的可重组制造系统的调度系统建模 总被引:1,自引:0,他引:1
采用多智能代理(Multi-Agent)技术进行可重组制造系统的调度研究,根据生产任务生成一个动态逻辑制造单元,生产调度是由调度部分对单元内的资源进行的,并分析了调度系统的工作工程.在此基础上,采用统一建模语言UML建立了系统的包图、类图、协作图.系统有两个包,动态逻辑制造单元包和调度包,每个智能代理(Agent)设计为一个类,分析了每个类的属性和操作,协作图则表示了不同对象间的相互协作和消息传递.选用建模工具Rational Rose2000建立系统的UML模型,并可生成系统的代码框架. 相似文献
8.
9.
可重组制造系统缓冲区容量的优化研究 总被引:1,自引:0,他引:1
为了确定可重组制造系统中的缓冲区容量,通过分析机床工作状态、生产需求量等因素对缓冲区容量的影响,建立了缓冲区状态数学模型.在此基础上,提出了缓冲区容量、机床可用度和任务需求率之间的函数关系.以满足生产任务为前提,将重组后加工域缓冲区容量最小化作为优化目标.通过粒子群优化算法,利用非可微精确罚函数法处理约束条件,采用可变惯性权重平衡搜索,以求得各工序间缓冲区容量.最后结合仿真实例,探讨了该生产线重组后系统缓冲区容量的最优配置. 相似文献
10.
11.
Ahmed M. Deif Waguih ElMaraghy 《The International Journal of Advanced Manufacturing Technology》2007,32(5-6):557-562
Responsiveness to dynamic market changes in a cost-effective manner is becoming a key success factor for any manufacturing
system in today’s global economy. Reconfigurable manufacturing systems (RMSs) have been introduced to react quickly and effectively
to such competitive market demands through modular and scalable design of the manufacturing system on the system level, as
well as on the machine components’ level. This paper investigates how RMSs can manage their capacity scalability on the system
level in a cost-effective manner. An approach for modeling capacity scalability is proposed, which, unlike earlier approaches,
does not assume that the capacity scalability is simply a function of fixed increments of capacity units. Based on the model,
a computer tool that utilizes a genetic algorithm optimization technique is developed. The tool aids the systems’ designers
in deciding when to reconfigure the system in order to scale the capacity and by how much to scale it in order to meet the
market demand in a cost-effective way. The results showed that, in terms of cost, the optimal capacity scalability schedules
in an RMS are superior to both the exact demand capacity scalability approach and the approach of supplying all required capacity
at the beginning of the planning period, which is adopted by flexible manufacturing systems (FMSs). The results also suggest
that the cost-effective implementation of an RMS can be realized through decreasing the cost of reconfiguration of these new
systems. 相似文献
12.
13.
14.
首先介绍了可重构制造系统和公理化设计的基本概念,然后对可重构制造系统进行了二级分解,选取了其中非耦合情况下和准耦合情况下的案例,进行了可重构制造系统公理化设计,提出了X是算子的概念,并赋予了,新的概念。创新的利用公理化设计的方法对可重构制造系统进行相应的拆分与重组:根据市场需求,将整个制造系统拆分成具有部分功能组合的制造系统;将各个功能组合,组成整个制造系统。这对于提高制造系统的利用率,快速应对市场需求具有十分重要的意义。 相似文献
15.
16.
对可重构制造系统建模方法,包括基于Petri网的可重构制造系统建模、基于排队网络的可重构制造系统建模、基于马尔可夫链的可重构制造系统建模、基于多Agent理论的可重构制造系统建模等方法的研究现状进行了系统的介绍,并进行了分析和比较,最后给出了可重构制造系统建模的发展方向。 相似文献
17.
18.
19.
Chu Hong-yan Cao Quan-jun Fei Ren-yuan 《Frontiers of Mechanical Engineering in China》2006,1(4):375-380
The task of production scheduling is to determine the detailed machining path, time, machine tool, etc., for every work piece,
according to the production objective and constraints. It is also an important part of the manufacturing system. In this paper,
the manufacturing cell-based workshop is described and its scheduling system structure is established based on MAS (multi-agent
system) technology. Through the negotiation and communication of each agent, the machining path is determined and the machining
sequence and start time are calculated by GA (genetics algorithm). The communication among agents uses the CORBA (common object
request broker architecture) technology of the OMG (Object Management Group). The CORBA-based architecture of the communication
is designed and some interfaces for the communication are listed. For the genetics algorithm, chromosome coding, fitness function,
parameters selection, and the basic genetics operation including selection, crossover and aberrance, are described. The scheduling
system also can deal with some abnormal conditions, such as machine tool failure and urgent tasks. Finally, two scheduling
examples are given. 相似文献