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README
GPL-2.0

FJSPScheduler

介绍

用于解决多目标柔性车间调度问题的调度器。 未来将融合强化学习、鲁棒性调度。

声明

开源许可证:GPL2.0

软件架构

maven项目,全java编写。

首先,解决了柔性车间调度问题。柔性车间调度问题分为两子问题:工序加工顺序的选择;工序加工机器的选择。本项目使用了两种方法:基于优先规则的调度;基于遗传算法的调度。

其次,解决了多目标的调度问题。根据三个目标,甚至三个以上目标(综合考虑很多约束条件),去选择出种群中较优的个体作为最终调度方案。本项目目前设计了两个多目标优化的算法:NSGA-II(两个目标),NSGA-III(三个目标及以上)。

Main类:运行类

scheduler包:

  • SampleScheduler:基于优先规则的调度类。调度的整体框架
  • GAScheduler:遗传算法的调度类。调度的整体框架,通过调用不同函数实现不同算法
  • GAScheduleManager:不同类型遗传算法的具体实现(原始遗传算法、多目标遗传算法NSGA-II、NSGA-III)
  • GeneticConfiguration:遗传算法的配置类,所有算法用到的参数都保存在这
  • ChromosomeOperation:遗传算法的算子,选择、交叉、变异
  • NSGAII:NSGAII算法的实现,快速非支配排序、拥挤度计算等
  • NSGAIII:NSGAIII算法的实现,目标归一化、参考点选取等

util包:

  • FileHandler:将输入的数据转化,存储在项目中的对象里
  • InstanceUtil:负责项目的各种输出、打印工作,将种群绘制在2维或3维坐标系中(多个目标的值组成一个点)、绘制文字版本的甘特图、打印配置信息等

pojo包:

  • Product 工单产品实体类
  • Process 工序实体类
  • Machine 机器设备实体类
  • Instance 调度案例实体类,一个对象存储一个调度案例。包含工单、工序、设备、工序比较器、设备比较器、调度目标等
  • Chromosome 染色体实体类,染色体的工序编码、设备选择编码、适应度值、NSGA算法相关染色体的参数
  • CandidateMachine 候选设备类,某一工单的某一工序可以选择运行的设备,总工时、准备时间、加工时间等

rule包:

  • machinerule包:某一道工序选择设备时,有多个设备可以选择,在这个包下定义设备选择的规则,按照规则选择设备
  • processrule包:排班的时候要一个一个的排工序,所以要按照一定的规则给所有工单的工序进行排序,按优先顺序进行调度。(我的理解遗传算法也是找出工序的一个最优的调度顺序) objective包:不同的调度目标类,每一个instance实例都有若干个目标来表示其调度结果的好坏。染色体中也要根据目标的值计算适应度值,然后遗传算法根据适应度值淘汰不好的个体。

manager包:主要是两个类

  • SchedulerManager:调度的具体实现,也是基于优先规则的调度算法的具体实现。包括调度前的准备工作,调度后的处理工作,还有调用ProcessManag类实现工序分配。
  • ProcessManager:工序分配的具体实现,选择工序,分配设备,并使用插空的方法把设备的空闲时间分配给工序。

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用于解决柔性车间调度问题的调度器 展开 收起
Java
GPL-2.0
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