Abstract With rapid advances in new generation information technologies, digital twin (DT), and cyber-physical system, smart assembly has become a core focus for intelligent manufacturing in the fourth industrial evolution. Deep integration between information and physical worlds is a key phase to develop smart assembly process design that bridge the gap between product assembly design and manufacturing. This paper presents a digital twin reference model for smart assembly process design, and proposes an application framework for DT-based smart assembly with three layers. Product assembly station components are detailed in the physical space layer; two main modules, communication connection and data processing, are introduced in the interaction layer; and we discuss working mechanisms of assembly process planning, simulation, predication, and control management in the virtual space layer in detail. A case study shows the proposed approach application for an experimental simplified satellite assembly case using the DT-based assembly application system (DT-AAS) to verify the proposed application framework and method effectiveness.

中文翻译：

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基于数字孪生的复杂产品智能装配工艺设计与应用框架及案例研究

摘要 随着新一代信息技术、数字孪生（DT）和信息物理系统的快速发展，智能装配已成为第四次工业演进中智能制造的核心焦点。信息世界和物理世界的深度融合是开发智能装配工艺设计的关键阶段，它可以弥合产品装配设计和制造之间的差距。本文提出了智能装配工艺设计的数字孪生参考模型，并提出了基于DT的三层智能装配应用框架。产品组装站组件在物理空间层详述；交互层引入了通信连接和数据处理两个主要模块；我们讨论了装配过程规划、模拟、预测、并在虚拟空间层详细控制管理。案例研究显示了使用基于 DT 的装配应用系统 (DT-AAS) 对实验简化卫星装配案例提出的方法应用，以验证所提出的应用框架和方法的有效性。