针对工艺规划与调度集成(integrated process planning and scheduling,IPPS)问题中的顺序柔性调度问题,提出了基于简单顺序关系的顺序柔性描述模型及调度模型,并改进遗传算法设计了集成型的顺序柔性调度算法。染色体编码同时采用简单顺序关系编码和基于工序的编码,并为两种编码分别设计了多种交叉和变异操作。为避免遗传算子产生违背工序顺序优先关系的不可行解,提出了顺序约束修正策略;针对遗传算法易过早收敛的缺陷,设计了自适应调节变量以强化种群多样性,并引入变邻域搜索算法改变解的搜索邻域,进一步搜索最优调度方案。三种不同规模的实验仿真验证了问题描述模型及调度算法的有效性。
【英文摘要】
To solve the integrated process and planning scheduling( IPPS) problem with sequencing flexibility,the paper proposed a representing model and a mathematical scheduling model for sequencing flexibility based on the simple order relationship. Moreover,on the basis of improved genetic algorithm( GA),it presented an integrated scheduling algorithm for sequencing flexibility. The coding of a chromosome was a combination of simple order relationship code and operation-based code. It specified a variety of operat...
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