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Vehicle Dynamics Library 1.6 is available

Modelon May 9, 2012

New features include powertrain driveability and take-off analysis and chassis tuning

Version 1.6 of the Vehicle Dynamics Library has been released, containing the following main enhancements:


The Powertrain sub-package has been extended with components that allow for powertrain oriented analysis.

  • Template-based engine models with cycle resolved characteristics. The new models allow studying the mechanics of the engine, and engine-induced vibrations.
  • Engine, transmission and driveline mounts integrated in templates, including different options for mount characteristics.
  • Updated transmission models that can handle arbitrary number of gears, with optional gear dependent compliance and backlash for vibration analysis. Automatic transmission with torque converter and compliant lock-up-clutch. Slip-based continuously variable gear.
  • KERS, flywheel that can capture and release kinematic energy, based on rotating inertia.

The new powertrain components are designed to work well together with the rest of the vehicle and typical applications are drivability and take-off. The package has also been extended with dedicated powertrain test scenarios that makes use of test rigs to evaluate vibrations, acceleration performance etc.


Vehicle Dynamics Library 1.6 supports tuning of vehicles and chassis. This allows for automatic tuning of e.g. camber, toe, cross weight, and ride height. In the library, there is a sub-package called Tunables that contains components such as mounts, spring seats, and links that can be adjusted during simulation. The tunable components fit within the standard suspension architectures to facilitate configuration.

Grounds and Roads

Support for explicit contact point calculation so that the contact point can be performed in the ground model instead of the wheel or impact component. This allows for more convenient plug in of external ground and road models.


A new architecture for data management is introduced in the DataAccess package.

  • It allows users to conveniently populate models with data from sources outside the Modelica environments.
  • Users can also define own data hierarchies that do not have to match the model hierarchies.
  • Data can be both read from and written to the source. This gives a convenient way to link several simulations together.
  • The architecture further allows for convenient switching between different sources and source types with single changes.
  • DataAccess is especially suited for model export as it allows users to conveniently change model parameters in a consistent way regardless of how the model is exported (C-code, .dll, .exe, FMU, Simulink etc.).
  • DataAccess can be made compatible with any format, by default it comes with support for XML.

Vehicle Dynamics Library 1.6 is available for Dymola 2013.


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