Developing cutting-edge 9HP Transmissions

Did you know that ZF trusts in SimulationX‘ modular and flexible approach for the development of its 8 and 9-speed automatic transmissions? Numerous options for analyses, real-time simulations and NVH calculations provide a rock-solid basis for a reliable evaluation and optimization of the transmission’s vibrational behavior. Undesired phenomena like rattling or knocking can thus be identified and eliminated early on.

 

During the international VDI conference „Getriebe in Fahrzeugen 2012“ on June 19 and 20, 2012, in Friedrichshafen, Germany, ITI and ZF revealed first details. Titled “A New Physical Simulation Model for the 9HP Gearbox Incorporating a Nonlinear Twin Torsional Damper and Backlashes”, the presentation showed a model of a 9HP transmission designed and optimized for transient and steady-state torsional vibration analyses. The model was created in SimulationX making use of its element oriented, physical modeling method. It allows for intuitive modeling of powertrains through drag-and-drop using predefined, ready-to-use model elements that reproduce realistic component behavior. The modular and flexible approach to modeling and parameterization permit quick changes in the model’s level of detail or adapting it to new system configurations. These features combined with a multitude of analysis options enable evaluations of vibrational behavior in transmissions, the selection and modification of torsional dampers as well as the examination and prevention of undesired phenomena, such as rattling and knocking. In fact, each physical parameter and component can be scrutinized for their particular impact on the system.

 

A printed copy of the proceedings for this year’s VID conference „Getriebe in Fahrzeugen 2012“ is available from VDI Verlag Düsseldorf under ISBN 978-3-18-092158-7.