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

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