The Department of Computer Integrated Design (DiK) at the TU Darmstadt deals with the topic of the Digital Twin from the perspective of virtual product development regarding Industrie 4.0. Digital Twins essentially combine the physical models and the condition data of a real product. Whereas models are the result of product development, Cyber-Physical-Systems continuously generates condition data during the product utilisation. Therefore, the Digital Shadow contains the condition data from the product and the Digital Master the models of the product development. From this combination, the behaviour of the physical product can be represented individually in a virtual environment. From the model-based data processing in the Digital Twin, derive consequential steps for product utilisation as well as requirements for following product development processes.In addition to the successful linking of state data of the Digital Shadows with the models of the Digital Master, the management of simulation data in the Digital Gemini is crucial. Scientific work is limited here to the automatic linking of geometry data with geometry models. However, there is a need for action in the application of simulation data and simulation models. This requires a structured administration of simulation input data and simulation output data as well as the comparison with simulation data from product development. Previous system architectures do not meet these requirements.At DiK, a concept for the architecture of a digital simulation twin was developed, which allows the administration of simulation input data and simulation output data. We built this concept under consideration of classical CAE process chains of product development. The central part of the concept is now the management of simulation input and output data in a simulation data management of the Digital Twin (SDM-DT). The SDM-DT takes over the connection between Digital Shadow and Digital Master for simulation data. The connection between the Digital Shadow and the SDM-DT is as a unidirectional connection designed. On the other side, the is a bidirectional connection between the SDM-DT and the models of the Digital Master. This connection enables the feedback of the simulation raw data from the models for interpretation.Additionally, a connection of the simulation data management of the Digital Twin with that of the virtual product development is considered. Based on an implementation close to industry, we implemented the concept prototypically. For this purpose, real product condition data was collected via a sensor network and transmitted to the Digital Shadow. Based on the requirements of the product development, the condition data were prepared and sent as simulation input data to the SDM-DT of the digital twin. Before the date run through the actual simulation, there is a comparison between simulation input data with historical input data from product development. Thus, there is a need for a central simulation data management for Digital Twins, and we designed and implemented a concept for the architecture of Digital Simulations Twins.

Concept of a System Architecture for a Simulation Data Management In the Digital Twin

Paper Proceedings: https://asmedigitalcollection.asme.org/ISPS/ISPS2021/volume/84799

ASME 2021 Information Storage and Processing Systems (ISPS2021)

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