The Database Research Group is leading SUBPROJECT B06
EFFICIENT TWINNING IN THE DIGITAL TWIN OF THE ROAD SYSTEM
The envisioned „Digital Twin of the Road System” requires a distributed but up-to-date and consistent management of all digital artifacts that are being generated by the road system and the vehicle, i.e. models and descriptions of behavior, and also the sensor and position data of the existing road system. Therefore, the “Digital Twin of the Road Systems” is integrating sensor data, data models and simulation in order to mirror the current state of the physical twin of the road system and derive forecasting statements.
For any part of the real road system there exists at least one model and one set of data that is evolving over time.
Models in the digital twin generate results that correspond directly or indirectly to a measured value, thus, at any point in time it is possible to compare or rather to synchronize the digital twin with the real road system.
A continuous synchronization of the physical and the digital twin is required via adaptation: It is necessary to maintain an analogy or rather a conformity of model results and real-life values that is within the boundaries of certain fixed limits.
The fundamental concept of a system for data processing and data synchronization is depicted in the figure above. Here, a central element is to compare every model of the digital twin with real life values. It is important to first define the notion of synchrony of the various model types with their corresponding real-life values. Should a breach of synchrony of a real-life part of the road system and the corresponding model be detected, an adaptation of the model is possible.
On the other hand, also adaptations of the fundamental data processing level can be required in order to measure the real-life values in compliance with the necessities.
In this subproject, data requirements will be developed that are continuously being adjusted on the basis of the continuous synchronization and that are being implemented by an adaptive data processing layer.
OVERALL VISION OF THE PROJECT:
The mobility of people and goods is a central basis of our modern society with increasingly global and diverse networked processes. In its present form, mobility, especially with regard to road traffic, is currently confronted with global challenges (durability, safety, efficiency, ecology, costs, automation etc.) that urgently require fundamental solutions.
In the SFB/TRR 339 (TU Dresden, RWTH Aachen, speaker: Prof. Michael Kaliske, Institute for Structural Analysis, TU Dresden), a spatially and temporally multi-dimensional, digital/virtual image (reality model in space and time) of vehicle, tires and road surface (concrete and asphalt) taking into account the road pavements (integrated multi-functionality) will be developed and researched. The reality model combines all available and relevant information about the “Road of the Future” from physical investigations and modeling as well as from informational and traffic data (sensor data, data models etc.). It enables and requires the interaction between the physical- structural and the informational-traffic design level. This interactive reality model in space and time is called the digital twin of the road system and is used in perspective to analyze, control and forecast the physical original (real road system consisting of vehicle, tires, lane, nearby street space) by means of common interfaces. The advancement of the road to a high-tech platform will be developed using the new, interdisciplinary research approach (civil engineering, computer science, society).
The research approach is based on a three-stage development strategy:
In Phase I, the required submodels are designed and developed. In Phase II, the partial models are combined using common, standardized interfaces and integrated into a holistic model of the road system (digital shadow), which in Phase III will allow the analysis and control of the road system with its own control components (digital twin).
The aim is to achieve the vehicle’s present high level of development in a similar way for the road system, so that a new quality of integration of vehicles and infrastructure can be achieved. The overriding aspects of law and sustainability shall be explicitly included into the conception and development of the digital twin of the road system from the beginning on. The digital twin of the road system will lead to an intelligent, gentle and sustainable use of the road infrastructure. Other expected results are groundbreaking condition forecasts, interfaces to local traffic control, the optimal synthesis of building materials and structures, interfaces to automated driving and the reduction of emissions, e.g. by minimizing traffic jams or durable road infrastructure components (use of resources).
Projekt Website: www.sfbtrr339.de/