共查询到20条相似文献,搜索用时 109 毫秒
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基于遗传算法的车间生产调度系统研究 总被引:1,自引:0,他引:1
随着制造业的快速发展,如何有效的实现车间生产调度系统的整体优化,是很多企业需要解决的紧迫问题。针对以上问题,提出了基于遗传算法的车间生产调度系统,建立了最小化完工时间目标模型,研究了基于遗传算法的车间生产调度系统实现过程。最后,以C#为开发语言,以Visual Studio2008为开发平台,开发成功了车间生产调度系统模块并用实例和仿真验证了该方法的可行性。 相似文献
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针对模具加工的特点,分析了其车间调度中的各种实际情况和约束关系,针对不同类型设备推导出了相应的调度公式。引入了“工时虚增值”的概念,并在此基础上提出和实现了相关的优先权值调度算法。实践证明,该算法具有良好的可行性和实际可靠性。 相似文献
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一种车间调度系统算法的设计与实现 总被引:1,自引:0,他引:1
采用一种混和编码方式,并将局部搜索运用到变异算子,该方法能及时反映种群在进化过程中的过早收敛程度,不仅能加快计算速度,而且还能增强算法的全局收敛性.算法以其通用性强,算法简单等特点,可被广泛应用到车间调度问题的优化中. 相似文献
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面向MES的车间生产调度系统的研究与实现 总被引:5,自引:0,他引:5
通过对现代企业生产管理特点的分析,提出了面向MES的车间生产调度系统的设计思想,详细介绍了该系统的功能模块与实现技术,并开发了较为实用的生产调度原型系统,为车间调度实施计算机管理、提高生产效率提供了有效的工具。 相似文献
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求解作业车间调度问题的双倍体遗传算法与软件实现 总被引:15,自引:1,他引:15
作业车间调度问题是最困难的组合优化问题之一,也是计算机集成制造系统中的一个关键环节,在实际生产中具有广泛应用。为此,提出了双倍体遗传算法。该算法提供了一种记忆以前有用的基因块的功能,保留了某些低适应度染色体中的一些局部基因块,构成最优解中的基因片段,提高遗传算法的适应能力。与已有算法相比,基于双倍体遗传算法的作业车间调度方法,显著提高了搜索效率,改进了收敛性能。 相似文献
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建立了基于多工艺加工计划的生产调度数学模型,给出了基于改进遗传算法的无辅助加工时间多工艺加工计划调度算法,通过与国外学者提出的算法相比较,证明了该算法的正确性和优越性,实验结果表明,模型是正确的,算法是有效的。 相似文献
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为解决个性化定制车间生产-物流协同动态调度问题,提出一个完全反应式调度信息-物理系统框架。在该框架基础上,提出一种“单步”调度算法并重点设计了一个综合考虑客户满意度、设备利用率与能耗的任务优先级计算规则。由于“单步”调度算法每次只考虑当前一步的生产或物流任务的调度,生产-物流协同能力较弱,所以为了弥补该缺陷,又在其基础上提出一种综合考虑生产与物流两步任务调度的“双步”调度算法。针对车间内可能发生的设备故障等扰动,设计抗扰动机制以增强两算法的抗扰动能力。仿真试验结果表明,“单步”调度算法虽然优于传统调度规则但却不如“双步”调度算法;后者能在一定扰动情况下,更好地配置生产与物流资源,且在“工件平均提前/拖期成本”指标上表现尤为出色,更能适应个性化定制场景。 相似文献
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根据现代制造企业生产调度的要求,采用基于启发式算法和遗传算法相结合的智能生产调度算法,建立了基于MES的智能生产调度系统。详细提出了该系统的总体结构及其实现流程;介绍了基础数据库、作业调度、结果输出以及系统维护四大功能模块的具体内容;实现该系统的关键技术,其中包括该混合算法的具体实现过程、标准工时数据库的建立硝及系统实现的技术支持。该系统弥补了单一算法的不足,能够取得良好的调度效果,从而提高企业的生产效益。 相似文献
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在4种经典排序问题及算法的基础上,提出12种排序问题及算法,给出该算法的软件和硬件实现方法,为解决中小型通用机械制造企业的生产调度问题,提供了一套切实可行的方案。 相似文献
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Li Shugang Wu Zhiming Pang Xiaohong 《The International Journal of Advanced Manufacturing Technology》2005,26(7-8):870-875
A real-time scheduling algorithm is proposed, that is, to first make a fuzzy classification for the operations of jobs in
real-time and then, according to their fuzzy sort, to schedule them with the heuristic. The heuristic is obtained by training
a neural network offline with the genetic algorithm. Based on these ideas a real-time scheduler is built with neuro-fuzzy
network (NFN). Finally the simulation for the real-time scheduling and the rescheduling are made. The results show that the
real-time scheduling algorithm is effective and highly efficient compared to the first in and first out (FIFO) and the Lagrangian
relaxation (LR) method. 相似文献
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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
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可重组制造系统的生产调度问题研究 总被引:2,自引:1,他引:2
可重组制造系统的调度问题具有动态性、可重组性的特点。采用Multi Agent技术用于可重组制造系统的调度问题研究,确定基于Multi Agent技术的可重组制造系统的生产调度系统的结构及其实现方法。 相似文献
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为了评估生产调度方案的绿色性,构建了基于LCA的生产调度绿色性评价框架,提出了面向生产调度评估的清单分析算法及其环境影响评价方法.并对某线路板厂的两种生产调度方案进行了评价,将结果进行了比较与分析,证明所提方法可以有效的评估调度方案的绿色性. 相似文献
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Process manufacturing has some characteristics that make it different from other types of industry. In practice, there are many examples of process industrial settings where production resources are shared and there is no intermediate storage between two processing units. Perhaps the most important issue usually to be excluded from the academic discussion of process production scheduling/control problems is the uncertainty of the duration of real chemical processes. These properties of process manufacturing result in blocking, no-wait, and other constraints that must be taken into account during designing the production scheduling system. The first part of the paper addresses some features of process manufacturing and their influence on production scheduling. The main part of the paper analyzes the scheduling problems under the presence of typical process constraints and unpredictable process duration times and introduces a simple and reliable approach to avoid these problems. The proposed concept is presented on a case study of an industrial two-stage washing batch subprocess. It is considered that the presented approach would be relatively easy to implement in a process production scheduling system and that it can contribute to more effective process production scheduling. 相似文献