| 卢晓红,贾振元,刘弟新.基于LP模式的车间内吊车调度系统研究[J].,2008,(2):215-219 |
| 基于LP模式的车间内吊车调度系统研究 |
| Study of crane dispatch for machining workshop based on LP mode |
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| DOI：10.7511/dllgxb200802011 |
| 中文关键词: 精益生产 仿真 调度 随机性 |
| 英文关键词: lean production simulation scheduling randomicity. |
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| 中文摘要: |
| 解决机加车间吊车响应工作地请求排队问题能显著提高整个系统的生产效率．结合精益生产理念，对系统进行了概括和抽象，建立了基于排队理论的仿真模型，提出了一种基于预测的初始请求到达间隔控制方法．通过仿真算例，得出目标变量随加工时间、吊车服务时间、各工作地服务请求初始到达时刻变化而变化的规律．研究了吊车服务时间和各工作地工作时间这两种主要随机变量对目标变量的影响．提出了已知描述变量——工作时间、服务时间和请求到达时间的较优组合方案．研究表明，该方案能降低最长等待时间和总等待时间，有效控制排队长度，提高系统的生产效率． |
| 英文摘要: |
| The matter of blocked requests for the crane′s service of the work areas in machining workshop is a common problem, settlement of which can directly improve the efficiency of the whole system. A simulation model of the system based on queue theories is built by utilizing the lean production principium. An arrival time interval control method based on prediction is developed. Through lots of simulation calculation cases, the rules of target values (the maximum latency time, total latency time of all the work area and the answer times and the total moving distance of the crane in a working day) changing along with the given descriptive variables (operation hours, crane service hours, and the original arrival time of the requests of the work areas) are elicited. The impact of two main random factors as the operation hours and the crane service hours is considered in the research. Applying the rules attained from the calculation cases, achieving the guideline of the conditional variables (operation hours, crane service hours, the original request arrival time) needs to change to be up to the optimal output of the simulation system under the current conditions. The research shows that this method can satisfactorily limit the maximum latency time and total latency time and control the length of the queue and improve the efficiency of the whole system |
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