Development of the milliAmpere 2 Digital Twin

Background & motivation

  • Autonomous surface vehicles (ASVs) rely on an autonomy system comprised of object detection algorithms, situational awareness and motion planning. Due to the system complexity, simulation-based testing will be an integral part of the verification process. 
  • A key element of the complete Digital Twin setup is the simulation models of vessel and equipment physics, as well as emulation of relevant control systems.
  • Many Digital Twin concepts rely only on data-driven models using ML. However, for simulation and testing throughout the lifecycle it is necessary with high fidelity first principles models, that accurately represent the behaviour of the specific vessel and its equipment.

Problem description

  • NTNU and Zeabuz have developed a Digital Twin setup for the pilot ferry milliAmpere 2, with simulation models established using the Open Simulation Platform (OSP).
  • This model should be further developed, tuned towards the recently launched real milliAmpere 2 ferry, and updated to facilitate updates based on data streams from the ferry.

Work proposal

  • Perform a literature study on existing methods and tools for maintaining a Digital Twin for simulation and testing.
  • Evaluate suitability of existing simulation models for mA2. Update or develop new models as needed.
  • Plan and conduct system identification on mA2 and tune simulation models accordingly.
  • Develop methods and processes for comparing a simulation model and the complete digital twin with their real-life counterparts.
  • Develop benchmark tests for comparing full-scale behaviour with simulated behaviour.
  • Identify necessary and desired measurements from the ferry for online monitoring and model updates
  • Design and implement a method for continuous updates of the mA2 Digital Twin based on data streams from the ferry.​​

Figure 1: A renderingen of milliAmpere2.