Abstract: Digital Twin technology is considered to be able to achieve the fusion and iterative optimization of product physical model and information model,thus shortening the product development cycle and reducing the cost of rework.Aiming at the problem of poor multi-disciplinary collaboration and high research and development cost of complex products,the concept of digital twin was introduced into the multi-disciplinary collaborative design of complex mechanical products.The research progress of multi-disciplinary collaborative design and digital twin was analyzed,and the information expression,integration and data interaction of digital twin model of product,production and their performance were discussed from the perspective of life cycle,and the evolution process model of digital twin was given.Based on the analysis of multi-stage modeling process of product digital twin,a reference architecture of multi-disciplinary collaborative design modeling for digital twin of product was designed.The method of mechatronics multi-disciplinary collaborative design and virtual engineering and the key technology of multi-disciplinary collaborative design for digital twin of product were proposed.The digital twin model of complex mechanical products was constructed by optimizing simulation and virtual commissioning,which solved the problems of cyber physical fusion of mechanical,electrical and automation multi-disciplinary systems in product life cycle.The feasibility of the proposed digital twin multidisciplinary modeling theory and its optimization method was verified by a case study.

Key words: digital twin, complex mechanical products, multi-disciplinary collaborative design, mechatronics, virtual commissioning, product lifecycle management, cyber-physical system, modeling

摘要： 数字孪生技术能够实现产品物理模型和信息模型的融合与迭代优化,从而缩短产品研发周期、降低返工成本。针对复杂产品多学科协同性差、研发成本高的难题,将数字孪生的理念引入到复杂机械产品多学科协同设计中。分析了多学科协同设计和数字孪生的研究进展,从全生命周期的视角探讨了产品、生产及其性能数字孪生模型的信息表达、集成与数据交互问题,给出了数字孪生的演变过程模型;在分析产品数字孪生多阶段建模过程的基础上,设计了一个产品数字孪生多学科协同设计建模参考架构,提出了机电一体化的多学科协同设计与虚拟工程方法和产品数字孪生多学科协同设计关键技术,通过优化仿真和虚拟调试构建了复杂机械产品的数字孪生模型,解决了产品全生命周期中机械、电气和自动化等多学科系统的信息物理融合问题。通过案例验证了所提数字孪生多学科建模理论及其优化方法的可行性。

关键词: 数字孪生, 复杂机械产品, 多学科协同设计, 机电一体化, 虚拟调试, 产品全生命周期管理, 信息物理系统, 建模