In recent years,as a promising way to realize digital transformation,digital twin shop-floor(DTS)plays an impor-tant role in smart manufacturing.The core feature of DTS is the synchronization.How to implement and main...In recent years,as a promising way to realize digital transformation,digital twin shop-floor(DTS)plays an impor-tant role in smart manufacturing.The core feature of DTS is the synchronization.How to implement and maintain the synchronization is critical for DTS.However,there is still a lack of a common definition for synchronization in DTS.Besides,a systematic synchronization mechanism for DTS is strongly needed.This paper first summarizes the defi-nition and requirements of synchronization in DTS,to clarify the understanding of synchronization in DTS.Then,a 5M synchronization mechanism for DTS is proposed,where 5M refers to multi-system data,multi-fidelity model,multi-resource state,multi-level state,and multi-stage operation.As a bottom-up synchronization mechanism,5M synchronization mechanism for DTS has the potential to support DTS to achieve and maintain physical-virtual state synchronization,and to realize operation synchronization of DTS.The implementation methods of 5M synchronization mechanism for DTS are also introduced.Finally,the proposed synchronization mechanism is validated in a digital twin satellite assembly shop-floor,which proves the effectiveness and feasibility of the mechanism.展开更多
以装配车间作业计划问题为研究对象,提出最优作业计划编制的 Petri网方法.为此,首先研究了一般车间作业计划编制问题的内容以确定问题的界限;其次,用 Petri 网模型规范表达装配流程,在网迁移机制中引入动态规划,从而得到求解计划的网最...以装配车间作业计划问题为研究对象,提出最优作业计划编制的 Petri网方法.为此,首先研究了一般车间作业计划编制问题的内容以确定问题的界限;其次,用 Petri 网模型规范表达装配流程,在网迁移机制中引入动态规划,从而得到求解计划的网最优算法.与传统方法相比,适应了计划脱期下的方便滚动和直观输出的要求,并使输出的计划具有最优性.展开更多
基金Supported by National Natural Science Foundation of China(NSFC)(Grant Nos.52120105008,52005026,52005025).
文摘In recent years,as a promising way to realize digital transformation,digital twin shop-floor(DTS)plays an impor-tant role in smart manufacturing.The core feature of DTS is the synchronization.How to implement and maintain the synchronization is critical for DTS.However,there is still a lack of a common definition for synchronization in DTS.Besides,a systematic synchronization mechanism for DTS is strongly needed.This paper first summarizes the defi-nition and requirements of synchronization in DTS,to clarify the understanding of synchronization in DTS.Then,a 5M synchronization mechanism for DTS is proposed,where 5M refers to multi-system data,multi-fidelity model,multi-resource state,multi-level state,and multi-stage operation.As a bottom-up synchronization mechanism,5M synchronization mechanism for DTS has the potential to support DTS to achieve and maintain physical-virtual state synchronization,and to realize operation synchronization of DTS.The implementation methods of 5M synchronization mechanism for DTS are also introduced.Finally,the proposed synchronization mechanism is validated in a digital twin satellite assembly shop-floor,which proves the effectiveness and feasibility of the mechanism.
文摘以装配车间作业计划问题为研究对象,提出最优作业计划编制的 Petri网方法.为此,首先研究了一般车间作业计划编制问题的内容以确定问题的界限;其次,用 Petri 网模型规范表达装配流程,在网迁移机制中引入动态规划,从而得到求解计划的网最优算法.与传统方法相比,适应了计划脱期下的方便滚动和直观输出的要求,并使输出的计划具有最优性.
