A multi-scale and multi-domain digital twin modeling method for workshop equipment

In order to satisfy the requirements of smart manufacturing, realizing the convergence of the workshop cyber-physical spaces, so as to further achieve the intelligent control of the workshop operation, is a vital and challenging task. Digital twin (DT) is recognized as the core technology for achieving Cyber-Physical Systems (CPS). However, because of the complex coupling characteristics of the workshop equipment, the construction of its DT model is still a significant challenge, which hinders the development of CPS in the workshop. This paper proposed a multi-scale and multi-domain DT model construction method for the workshop equipment. Firstly, a multi-domain unified modeling language Modelica is proposed to realize the construction of workshop equipment DT model. Then, the specific process of digital twin model construction for the workshop equipment is explored. Furthermore, we proposed the digital twin workshop implementation framework. Finally, a case study of digital twin workshop system is represented to validate the feasibility of our proposed approach.