共查询到20条相似文献,搜索用时 156 毫秒
1.
流程工业计划调度技术研究与发展分析 总被引:3,自引:0,他引:3
计划调度系统是企业生产活动的组织和管理中心,是提高企业综合效益的有效途径,该文分析了流程工业计划调度系统特征,全面深入地研究了生产计划与调度问题的模型框架及求解技术,并针对目前流程工业计划调度研究中存在的问题,从系统结构、建模优化、智能求解等方面提出了流程企业计划调度技术的发展趋势,为流程企业的生产优化组织与运作提供了方法论的指导。 相似文献
2.
3.
4.
针对热轧型钢企业生产计划调度的约束复杂、易延误交货期、寻求最优解困难等问题,提出生产计划调度系统的结构功能设计方案,选用改进的批决策批调度策略建立计划调度模型,并利用遗传算法求解生产调度计划。以某热轧型钢企业设计实现的制造执行系统为依托,研究生产计划调度系统的执行情况,通过不同的订单数据以及不同的计划编制方法进行模拟计算和结果比较,验证了该改进型批决策与批调度模型的解可降低设备调度、节省生产时间、减少交货延误,以此来指导热轧型钢的生产可切实提高企业生产效率。 相似文献
5.
谢彦峰 《自动化与仪器仪表》2006,(4):42-43,63
从当今电力检修企业面临的各种挑战出发,阐述了生产管理系统的特点和研究的必要性。使用面向对象编程语言Delphi和数据库系统SQL Server2000,按照企业设备检修流程设计开发了生产管理系统。系统运用提前/拖期调度模型,对企业生产作业流程进行计划、调度和控制,从而提高了生产效率,同时减少资源消耗和节约劳动力。 相似文献
6.
7.
该文以炼化企业的动态调度系统为应用背景,以面向动态调度的自适应用户界面的设计与实现为主要研究内容,分析了当前炼化企业动态调度系统用户操作的流程以及界面的需求并建立起相应的数学模型。借鉴自适应用户界面的相关研究成果,设计了自适应用户界面的体系结构以及用户的动态行为过程,针对流程行业的应用特点提出了利用产生式推理和基于上下文的用户意图捕捉的方法,最后给出应用实例。文中所述方法已经成功在企业中得到应用。使用结果表明,该方法能够有效地开发动态调度系统的自适应用户界面,获得满意效果。 相似文献
8.
9.
10.
制造企业集成化生产系统层级模块结构 总被引:3,自引:7,他引:3
传统的生产系统中,生产计划、调度与控制是分开进行的,生产信息的反馈周期长,生产调度缺乏必要的现场信息。通过分析生产系统的功能模型和信息模型,结合我国制造企业的实际情况,建立了生产管理系统的层级模块化结构,并详细阐述了各层模块的主要功能,提出了系统集成化方法。按照这种结构构建企业的集成化生产管理系统,将会实现生产计划的实时调度以及生产过程的实时控制。 相似文献
11.
12.
热轧型钢生产工艺复杂,其生产中极易出现由于计划调度安排不当而产生的交货期延误、库存超负荷等问题。针对以上问题研究设计了MES生产计划调度系统,改进了批决策调度策略用于数学建模,利用自适应遗传算法求解生产调度计划。以此为基础,为某热轧企业设计实现了生产计划调度系统,并通过真实的热轧型钢订单、原料、设备等数据,对模型改进前后的计划编制方法进行模拟与比较,验证了利用该改进型批决策与调度模型编制的热轧型钢生产调度计划可节省生产时间、降低设备调度时间,以此来指导热轧型钢的生产可切实减少交货延误和减少库存占用率,并提高企业利润率。 相似文献
13.
虚拟企业中电子商务应用的工作流模型及实现 总被引:14,自引:0,他引:14
虚拟中企业中电子商务技术应用的一个关键点是实现要实现跨组织、多数据库、实时的数据集成和过程集成,基于角色和扩展的Petri网,设计了一个能够建立虚拟企业中电子商务应用的工作流模型,并给出了原型系统的体系结构,该模型在概念层上比较容易表示各伙伴企业在实现业务目标时的动态行为;在物理实现时比较容易基于分布对象结构实现对象的即插即用、互操作,为虚拟企业实现电子商务应用提供了新的思路。 相似文献
14.
针对一体化机动进攻作战中战场抢修任务动态分配缺乏定量化确定方法的问题,对数字化机步旅抢修任务动态调度的框架结构进行了研究;借鉴Hall三维结构方法论,从对象维、过程维和技术维3个维度建立了抢修任务动态调度的框架结构,并以此为基础,分析梳理出了抢修任务动态调度的7个核心子问题,总结了这些核心子问题的自身特性,为抢修任务动态调度的后续研究提供了宏观规划和微观指导。 相似文献
15.
A Case Study on Integrated Production Planning and Scheduling in a Three-Stage Manufacturing System 总被引:1,自引:0,他引:1
This paper presents an integrated optimization model of production planning and scheduling for a three-stage manufacturing system, which is composed of a forward chain of three kinds of workshops: a job shop, a parallel flow shop consisting of parallel production lines, and a single machine shop. As the products at the second stage are assembled from the parts produced in its upstream workshop, a complicated production process is involved. On the basis of the analysis of the batch production, a dynamic batch splitting and amalgamating algorithm is proposed. Then, a heuristic algorithm based on a genetic algorithm (known as the integrated optimization algorithm) is proposed for solving the problem. Note to Practitioners-This paper presents a method for integrated production planning and scheduling in a three-stage manufacturing system consisting of a forward chain of three kinds of workshops, which is common in such enterprises as producers of automobiles and household electric appliances, as in the case of an autobody plant usually with the stamping workshop, the welding and assembling workshop, and the painting workshop. Herein, the production planning and scheduling problems are simultaneously addressed in the way that a feasible production plan can be obtained and the inventory reduced. A batch splitting and amalgamating algorithm is proposed for balancing the production time of the production lines. And a case study of the integrated planning and scheduling problem in a real autobody plant verifies the effectiveness of our method 相似文献
16.
17.
Agile intelligent manufacturing is one of the new manufacturing paradigms that adapt to the fierce globalizing market competition and meet the survival needs of the enterprises, in which the management and control of the production system have surpassed the scope of individual enterprise and embodied some new features including complexity, dynamicity, distributivity, and compatibility. The agile intelligent manufacturing paradigm calls for a production scheduling system that can support the cooperation among various production sectors, the distribution of various resources to achieve rational organization, scheduling and management of production activities. This paper uses multi-agents technology to build an agile intelligent manufacturing-oriented production scheduling system. Using the hybrid modeling method, the resources and functions of production system are encapsulated, and the agent-based production system model is established. A production scheduling-oriented multi-agents architecture is constructed and a multi-agents reference model is given in this paper. 相似文献
18.
19.
Mathematical modeling and evolutionary algorithm-based approach for integrated process planning and scheduling 总被引:3,自引:0,他引:3
Xinyu Li Liang Gao Xinyu Shao Chaoyong Zhang Cuiyu Wang 《Computers & Operations Research》2010,37(4):656-667
Traditionally, process planning and scheduling were performed sequentially, where scheduling was implemented after process plans had been generated. Considering their complementarity, it is necessary to integrate these two functions more tightly to improve the performance of a manufacturing system greatly. In this paper, a mathematical model of integrated process planning and scheduling has been formulated. And, an evolutionary algorithm-based approach has been developed to facilitate the integration and optimization of these two functions. To improve the optimized performance of the approach, efficient genetic representation and operator schemes have been developed. To verify the feasibility and performance of the proposed approach, experimental studies have been conducted and comparisons have been made between this approach and some previous works. The experimental results show that the integrated process planning and scheduling is necessary and the proposed approach has achieved significant improvement. 相似文献
20.
钢铁企业煤气优化调度模型研究 总被引:1,自引:0,他引:1
钢铁企业煤气系统结构非常复杂,煤气调度涉及的变量众多.通过对煤气系统网络结构的分析与研究,给出了煤气系统网络及其调度单元模型.煤气系统的网络结构由煤气管网和单元模型组成,单元模型连接到不同煤气管网,产生或消耗不同煤气.最后给出了各调度单元模型的详细建立方法. 相似文献