Web-Based Digital Twin
DISCUSSION OF THE RESULTS
In the following , we would like to discuss the presented concept and the implementation regarding the requirements for a web-based digital twin and the challenges and research gaps . Table 1 lists our assessment of the requirements .
Table 1 : Assessment of the elaborated requirements on a web-based digital twin . Requirements Representation of data Representation of behavior Controlled bidirectional connection Standardized external interfaces
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As we have shown in the concept and implementation , different types of data can be represented on the web to describe the |
Standardized internal interfaces Quality of Services |
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asset . However , the integration of CAD models is limited at the current time . Exchange formats |
such as STL can transfer the geometry - but information about the material or information about |
product manufacturing is lost . Extensive formats such as STEP cannot be imported with the |
libraries examined . |
After the system is represented in the web-based digital twin , the current status and behavior can be mapped by coupling the status information . The FMI standard can be used to bridge the incompatibilities between different simulation types when interconnecting them to build a simulation chain . The support of the FMI import and export is different in the proprietary simulation tools and not consistently possible . In addition , the interfaces between simulations of different domains are not standardized and the communicated data must be adapted manually . There is still a great need for research in the use of simulation data management in connection with digital twins . The conceptually elaborated idea could not be tested in the prototype , since no supporting development tools could be identified in this area .
The web-based digital twin , which is similar in state and behavior , can be coupled bidirectionally with the asset . However , due to the conceptual consideration , the directional connection was not implemented rigidly , but can also be unidirectional or completely disconnected depending on the use case .
By using standardized web interfaces when providing data and functions , the web-based digital twin can interact with other entities . The web server provides all functions via HTTP using all HTTP standards .
The digital twin must offer sufficient service quality depending on the use case in order to be used reliably . The quality of service depends on many factors , which must be analyzed depending on the implementation . Despite the advanced technologies , it will not be possible to ensure the guaranteed and very short response time required in some industrial applications . The communication between the individual components of the digital twin , as well as the processing of individual programs , and the execution of simulations reaches a composition of the digital twin
IIC Journal of Innovation - 15 -