The PTDynamics library is a library for modelling rotating MultiBody systems like automotive powertrains. It has been designed to provide a convenient modelling methodology and deliver efficient simulation of these complex systems. Animation is included in all the parts to aid understanding of the system dynamics. The library uses standard Modelica connectors and is compatible with all the other Automotive libraries available for Dymola.
PTDynamics includes models for shafts, bearings, gear meshes, flexible joints and complex assemblies such as epicyclic and differential models along with the associated mounting systems. The gear mesh models can include losses, backlash, mesh stiffness to enable detailed gearbox models to be developed. It has been developed for modelling automotive transmissions and drivelines but can be applied to any powertrain system.
One of the key application areas for the PTDynamics library is to model driveability. Using the library we can capture the full motion of the powertrain systems on their mounting systems to understand the vehicle response. This enables the tuning of the hardware specification and the control system to deliver the required vehicle response during a specified manoeuvre.
Chassis models are included within the library that are suitable for straight line tests. The chassis models include Pacejka tyre slip and simple suspension so that the vehicle can pitch and bounce under acceleration. To capture more complex interactions with the suspension then the Vehicle Dynamics library can be used as shown in the image below.