This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A Test-Based Procedure for the Identification of Rack and Pinion Steering System Parameters for Use In CAE Ride-Comfort Simulations
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 19, 2009 by SAE International in United States
Annotation ability available
Current CAE modeling and simulation techniques in the time domain allow, by now, very accurate prediction of many ride-comfort performances of the cars. Nevertheless, the prediction of the steering wheel rotation vibration excited by, for instance, wheel unbalance or asymmetric obstacle impact, often runs into the difficulty of modeling the steering line with sufficient accuracy. For a classic rack and pinion, hydraulic assisted steering line, one of the challenges is to model the complex and non linear properties - stiffness, friction and damping - of the rack-rack case system. This paper proposes a rack model, thought for easy implementation in complex multi-body models, and an identification procedure of its parameters, based on measurements, in the operational range of the wheel unbalance excitation. The measurements have been gathered by specific tests on the components and the test set-up is also shown here. An example is also presented here of accurate steering wheel rotation vibration predicted by a full-vehicle multi-body simulation including this rack-rack case properties representation.
CitationDiglio, P., Falbo, G., Bai, J., and Gu, J., "A Test-Based Procedure for the Identification of Rack and Pinion Steering System Parameters for Use In CAE Ride-Comfort Simulations," SAE Technical Paper 2009-01-2090, 2009, https://doi.org/10.4271/2009-01-2090.
- “Identification of steering system parameters by experimental measurements processing” Data S. Pesce M. Reccia L. IMechE 2004
- “A solid friction model.” Dahl P. Technical Report TOR-0158 The Aerospace Corp. El Segundo, California 1968
- “Optimus Users Manual” Noesis
- “AMESim, The Application manuals” LMS Imagine.Lab