ABSTRACT

The disassembly of used products is a critical procedure in remanufacturing, and different disassembly strategies are often obtained from different perspectives. To describe the disassembly process more accurately, the uncertainty of the information in the disassembly process should be considered. Therefore, random variables are introduced for disassembly time, cost, and effort. Based on the extended stochastic Petri net modeling method and stochastic programming theory, a stochastic optimization algorithm combined with artificial intelligence technology and a multiobjective genetic algorithm are designed, and a multiobjective optimization model for the disassembly sequence of used car parts under uncertain conditions is successfully constructed. This model considers the viewpoint of the decision maker. Moreover, the Monte Carlo method is applied to solve the multiobjective optimization model, and the validity and practicability of the model are verified by an example of an automotive transmission.

Implications: With the rapid development of the economy and the shortening of the product life cycle, the rate of product renewal is getting faster and faster, which also leads to the production of a large number of waste products. According to the forecast of the relevant departments, it is estimated that, in 2020, there will be about 35 million used televisions, 15 million used refrigerators, 13 million used washing machines, 12 million used air conditioners, 57 million used computers, and 8.3 million scrapped cars. Waste products contain a lot of renewable resources. If they cannot be effectively recycled, it will be a great waste of resources, and unreasonable disposal of waste products may have a negative impact on the environment. Therefore, due to environmental pressure and economic drive, product recycling and remanufacturing activities have caused widespread concern in society. Disassembly is defined as the operation or activity of disassembling an assembly such as a product, assembly, or component, and is the result of multiple removal operations of the product. It is a prerequisite for the efficient recycling of products and the first link in remanufacturing, that is, disassembly as a new production activity, which can provide raw materials for the smooth progress of the remanufacturing production plan, namely, old rough or used parts. Efficient dismantling not only saves natural resources and energy, but also effectively reduces environmental pollution. It is also an important guarantee for promoting the healthy development of the circular economy and achieving sustainable industrial development. The length of time required for the dismantling process, the level of costs, and the amount of profits obtained will directly affect the economic benefits of the recycling of end-of-life products. Therefore, the evaluation and optimization of the dismantling process of waste products have become one of the current hot issues. The research on the dismantling of waste products is conducive to speeding up the recycling process of waste, to a greater extent, the rapid and full recovery of resources, and to a certain extent, it will provide value basis and theoretical significance for subsequent research.

摘要

旧产品的拆解是再制造中的关键环节，往往从不同的角度得出不同的拆解策略。为了更准确地描述拆卸过程，需要考虑拆卸过程中信息的不确定性。因此，为分解时间、成本和工作量引入了随机变量。基于扩展随机Petri网建模方法和随机规划理论，设计了一种结合人工智能技术和多目标遗传算法的随机优化算法，成功构建了不确定条件下废旧汽车零部件拆解序列的多目标优化模型. 该模型考虑了决策者的观点。而且，

影响：随着经济的快速发展和产品生命周期的缩短，产品更新换代的速度越来越快，这也导致了大量废品的产生。据相关部门预测，预计到2020年，二手电视约3500万台、冰箱约1500万台、洗衣机约1300万台、空调约1200万台、电脑约5700万台、二手电脑约8.3台。百万报废汽车。废品含有大量可再生资源。如果不能有效回收利用，将是对资源的极大浪费，不合理处置废品可能对环境产生负面影响。因此，由于环境压力和经济驱动，产品回收再制造活动引起社会广泛关注。拆卸被定义为拆卸组合件（例如产品、组件或部件）的操作或活动，并且是多次拆卸产品操作的结果。它是产品高效回收利用的前提，是再制造的第一个环节，即拆解作为一项新的生产活动，可以为再制造生产计划的顺利进行提供原材料，即旧的毛坯或废旧零件。高效拆解不仅节约了自然资源和能源，还有效减少了环境污染。也是促进循环经济健康发展、实现产业可持续发展的重要保障。拆解过程所需时间的长短、成本的高低、获得的利润多少，将直接影响报废产品回收的经济效益。因此，废品拆解过程的评价和优化成为当前的热点问题之一。废品拆解的研究有利于加快废弃物的回收利用进程，更大程度上有利于资源的快速全面回收，在一定程度上将为后续研究提供价值基础和理论意义。废品拆解工艺评价与优化成为当前的热点问题之一。废品拆解的研究有利于加快废弃物的回收利用进程，更大程度上有利于资源的快速全面回收，在一定程度上将为后续研究提供价值基础和理论意义。废品拆解工艺评价与优化成为当前的热点问题之一。废品拆解的研究有利于加快废弃物的回收利用进程，更大程度上有利于资源的快速全面回收，在一定程度上将为后续研究提供价值基础和理论意义。