Digital twin

The interplay between data and real world

What is a digital twin?

According to Council, N. R. "NASA space technology roadmaps and priorities: restoring NASA’s technological edge and paving the way for a new era in space." The National Academies Press., Washington, DC (2012): 376.
A Digital Twin is an integrated multiphysics, multiscale simulation of a vehicle or system that uses the best available physical models, sensor updates, fleet history, etc., to mirror the life of its corresponding flying twin. The Digital Twin is ultra-realistic and may consider one or more important and interdependent vehicle systems, including propulsion/energy storage, avionics, life support, vehicle structure, thermal management/TPS, etc.

What is our contribution?

BAC-Bench is a co-simulation environment for benchmarking the performance of BACS (building automation and control systems). In its core, BAC-Bench is an EnergyPlus model of the Urban Mining and Recycling (UMAR) unit at NEST of Empa. The EnergyPlus model is wrapped into a functional mockup unit (FMU) to enable co-simulation. Measurements at UMAR are conducted at various nodes and registered in one-minute intervals. The real time operation is illustrated below.


Open source!

We introduce BAC-Bench, an open test environment that forms the core of the digital twin with options to run assessments offline or in real-time. BAC-Bench allows researchers to benchmark the performance of new controllers against that of a baseline controller. BAC-Bench also enables researchers to assess the reliability of their controllers amid uncertainties in climate or building operation.