Multi-Domain Vehicle Dynamics Simulation

Battery electric and hybrid electric drives will be a prominent feature of future cars. Increasingly, subsystems such as the steering and braking system will be based on electric power supply. This leads to new challenges as well as opportunities in the field of vehicle dynamics.

Modelon provides tools and services to manufacturers such as Audi that help them combine multi-body-based vehicle dynamics models with models of the electric and control systems.

Audi e-tron sports car

Audi is using Modelon tools and services for testing and simulation of its e-tron sports car.

The chassis and suspension were modeled with the Vehicle Dynamics Library (VDL) and the electric power steering system was modeled using the Modelica Standard Library. The steering system controller unit was modeled in both the Modelica Standard Library and Matlab Simulink.

Dymola and Matlab Simulink have alternatively been used as simulation environments. A special focus was put on different ways to integrate these tools according to standard development processes in the automotive industry.

The representation of the vehicle in VDL enabled Audi to study the interaction between the mechanics and the power electrics in a true multi-domain manner.  Because it took advantage of the Dymola Simulink interface, the complete vehicle model could be exported to Simulink for control design.