AI 中文总结
本文提出用于循环制造系统二手部件功能评估的统一实体描述（UED），通过两层耦合结构关联部件实体特征与子系统功能行为，经角磨机主轴案例验证可支持相关决策。
AI 中文摘要
循环制造系统需要基于二手部件的物理状态对其进行功能评估。现有方法从设计、制造、退化等不同视角描述该状态，导致表示结果碎片化且互不兼容，进而无法将物理状态与对应子系统的功能行为可靠关联，而这是做出合理R策略决策的前提。本文提出了统一实体描述（Unified Embodiment Description，UED），这是一种依赖于机械部件状态的表示形式，分为两个耦合层：第一层是统一特征空间，可随新生命周期效应的出现进行适配与扩展；第二层是功能导出的公差区域，用于将这些实体特征与周围子系统的功能行为关联。配套的UED方法指导两层的模型构建过程。本文通过角磨机主轴的案例研究验证了UED，对制造偏差以及抛光磨损、划痕等退化模式进行了量化，将这些实体变化嵌入统一特征空间，并通过主轴-轴承子系统的实验测试转化为功能导出的公差区域。结果表明，生命周期内产生的实体变化可在统一特征空间中持续整合，且可量化实体与功能行为的关系以支持报废决策。总体而言，UED为实体建模提供了基础，该模型可适配部件状态，支持循环制造系统中二手部件基于功能评估的决策。
英文摘要
Circular manufacturing systems require functional evaluation of used components based on their physical state. Existing approaches describe this state from separate perspectives, such as design, manufacturing, and degradation, resulting in fragmented and incompatible representations. As a consequence, the physical state cannot be reliably linked to the functional behavior of the corresponding subsystem, which is a prerequisite for informed R-strategy decisions. This paper introduces the Unified Embodiment Description (UED), a state-dependent representation of mechanical components structured into two coupled layers. The first layer is a unified characteristic space, which adapts and extends as new lifecycle effects emerge. The second layer consists of functionally derived tolerance regions that link these embodiment characteristics to the functional behavior of the surrounding subsystem. A supporting UED method guides the model-building process of both layers. The UED is demonstrated in a case study on the spindle shaft of an angle grinder, in which manufacturing variations and degradation patterns such as polishing wear and scratches are quantified. These embodiment changes are embedded into the unified characteristic space and translated into functionally derived tolerance regions through experimental testing of the spindle-bearing subsystem. The results show that embodiment changes induced over the lifecycle can be consistently integrated within the unified characteristic space and that the relations between embodiment and functional behavior can be quantified to support end of life decisions. Overall, the UED provides a foundation for embodiment modeling that adapts to component state and enables decision-making based on functional evaluation for used components in circular manufacturing systems.
Comments24 pages, 12 figures, submitted to the Journal of Manufacturing Systems' special issue about circular factories, the manuscript is under review
