The asset administration shell (AAS) has a virtual representation as an asset description and technical functionality as a smart manufacturing service. A digital twin (DT) is an advanced virtual factory technology that has simulation as its core technical functionality, which it performs in the type and instance stages of the physical asset. For providing an efficient information object to the DT application, this paper proposes Virtual REpresentation for a DIgital twin application (VREDI): an asset description for the operation procedures of a work-center-level DT application. For the successful application of DT as a smart factory technology, VREDI is designed to meet four core technical requirements—DT definition, AAS property inheritance, improving the existing asset description, and supporting DT-based technical functionalities. Based on the analysis of the technical requirements, the elements of VREDI are derived and the reference relationships between them are designed. It is then possible to provide the required technical functionality using the VREDI header, and a detailed P4R structure and elements of the body are defined. VREDI is applied to the concept to support the main properties of the DT. It is designed to inherit the AAS properties for efficient information management and interoperability. The application of advanced concepts such as “type and instance” and supporting vertical integration and horizontal coordination overcomes the limitations of the existing asset descriptions. Additionally, VREDI designates elements for supporting six DT-based technical functionalities in the type and instance stages of the physical work center.

资产管理外壳（AAS）具有作为资产描述的虚拟表示和作为智能制造服务的技术功能。数字孪生（DT）是一种先进的虚拟工厂技术，其模拟功能是其核心技术功能，它在有形资产的类型和实例阶段执行。为了向DT应用程序提供有效的信息对象，本文提出了数字双胞胎应用程序（VREDI）的虚拟表示形式：对工作中心级DT应用程序的操作过程的资产描述。为了将DT成功地应用为智能工厂技术，VREDI旨在满足四个核心技术要求-DT定义，AAS属性继承，改进现有资产描述并支持基于DT的技术功能。在对技术要求进行分析的基础上，推导了VREDI的元素，并设计了它们之间的参考关系。然后可以使用VREDI标头提供所需的技术功能，并定义详细的P4R结构和主体元素。VREDI应用于该概念以支持DT的主要属性。它旨在继承AAS属性，以实现有效的信息管理和互操作性。诸如“类型和实例”之类的高级概念的应用以及对垂直整合和水平协调的支持克服了现有资产描述的局限性。此外，VREDI在物理工作中心的类型和实例阶段指定用于支持六种基于DT的技术功能的元素。