Abstract: Digital twin acts as a crucial enabler integrating information space and physical world,in which the integration of complex product design-manufacturing is one of the key phases that facilities the application of intelligent manufacturing.However,current studies of digital twin technologies focus on the workshop operation and product maintenance,few efforts have been devoted to researching the capability of digital twin for the integration of complex product design-manufacturing.While there are various stages involved in realizing intelligent manufacturing,the most significant stage is the designing of the product,which is also the beginning of specifying digital twin as it impacts subsequent intelligent machining,assembly,operation and maintenance.Therefore,connation of complex product design-manufacturing integration based on digital twin was explored,and a ring-shape framework for digital twin-based complex product design and manufacturing was proposed.According to the framework,key techniques of digital twin-based complex product design and manufacturing were researched from the requirement,conceptual design,personalized configuration,virtual prototyping,multidisciplinary design,and data management perspectives.Two case studies were provided to exhibit application scenario of key digital twin techniques for complex product design and manufacturing integration.

Key words: digital twin, intelligent manufacturing, complex product design, design and manufacturing integration, virtual prototype, personalized design

摘要： 数字孪生是实现物理信息深度融合的一个重要抓手,复杂产品设计和制造信息物理融合是其中最重要的环节,为最终智能制造的落地提供了有效途径。当前,针对数字孪生技术的研究与应用主要集中在车间运行和产品运维等方面,而将数字孪生技术应用于复杂产品设计与制造融合的研究较少。产品设计是智能制造的第一个环节,也是产生数字孪生体的第一个环节,研究基于数字孪生的复杂产品设计制造一体化开发对实现后续的智能加工、装配和运维等具有重要影响。为此,分析了基于数字孪生的复杂产品设计制造一体化开发内涵,提出了基于数字孪生的复杂产品环形设计框架;基于所提出的框架,从需求分析、概念设计、个性化配置设计、虚拟样机、多学科融合设计和数据管理等方面,探索了基于数字孪生的复杂产品设计制造一体化开发中的关键技术;通过两个典型应用案例,展示了数字孪生关键技术在复杂产品设计制造一体化开发中的应用场景。

关键词: 数字孪生, 智能制造, 复杂产品设计, 设计制造一体化, 虚拟样机, 个性化设计