Jochen Köhler
ZF Friedrichshafen AG, Friedrichshafen, Germany
Michael Kübler
ZF Friedrichshafen AG, Friedrichshafen, Germany
Julian King
ZF Friedrichshafen AG, Friedrichshafen, Germany
Download article
http://dx.doi.org/10.3384/ecp14096259Published in: Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden
Linköping Electronic Conference Proceedings 96:26, p. 259-264
Published: 2014-03-10
ISBN: 978-91-7519-380-9
ISSN: 1650-3686 (print), 1650-3740 (online)
Simulation models play a fundamental role in the development of transmission control software. In the ideal case; the same model can be used throughout the whole development process from concept and design over implementation to system verification. The idea is to use one uniform model along this V-scheme. This leads to the requirement that simulations have to be able to run in real-time on hardware-in-the-loop platforms. On the other hand; very detailed models of some components might be needed during the early design phase.
Thus; a trade-off between modeling depth and computational performance has to be found. This may be achieved by selectively simplifying parts of the model that are prone to generating stiff sub-systems or a large number of state events.
Within this framework; the present paper introduces the Modelica simulation model of TraXon; the new modular transmission for heavy commercial vehicles by ZF. The model can be adapted to various needs by replacing components according to the required modeling depth and/or dynamical behavior.
After a brief overview of the ZF in-house Modelica libraries and the architecture of the TraXon model; some approaches and tools are described for evaluating and optimizing models with respect to real-time issues.
ZF Modelica libraries; model simplification; performance analysis; hardware-in-the-loop
[1] Koehler J, Banerjee A. Usage of Modelica for transmission simulation in ZF. Proceedings of the 4th Modelica Conference 2005, Hamburg, Germany, Modelica Association, 7-8 March 2005
[2] Modelica Standard Library (Version 3.2), Modelica Association, 2010, https://www.modelica.org/libraries
[3] Dymola 2014, Dassault Systemes http://www.3ds.com/productsservices/catia/capabilities/systemsengineering/modelica-systemssimulation/dymola
[4] SimulationX 3.6, ITI GmbH, http://www.itisim.com/simulationx/
[5] Matlab / Simulink, The Mathworks, http://mathworks.com
[6] ZF Friedrichshafen AG, www.zf.com/TraXon
[7] The DSblock model interface,
https://www.modelica.org/documents/DSblock
