This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Prediction of Vehicle Steering System NVH from Component-Level Test Data
Technical Paper
2006-01-0483
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
This work demonstrates a practical method for predicting vehicle-level automotive steering system NVH performance from component-level NVH measurements of hydraulic steering pumps. For this method, in-vehicle measurements were completed to quantify vehicle noise path characteristics, including steering system structure borne, fluid borne and airborne paths. At the component level, measurements of steering pump reaction forces, sound power and dynamic hydraulic pressure were also completed.
The vehicle-level measurement data was used to construct NVH transfer functions for the vehicle. These transfer functions were in turn combined with the pump component data measured on a test stand to create a prediction for steering pump order vehicle interior noise. The accuracy of these predicted values was assessed through comparison with actual vehicle interior noise measurements.
The results of this study yielded a useful and practical tool for predicting steering system vehicle noise from component-level data, as well as a contribution analysis of the relative importance of the three steering system noise paths. In particular, at engine idle speeds, the fluid borne noise path dominated vehicle steering system NVH to the degree that other noise paths (i.e. airborne and structure borne) could be disregarded. However, this assumption could not be made at higher engine speeds, where interior noise tended to be dominated by the airborne and structure borne transfer paths.
Recommended Content
Citation
Fernholz, C. and Nessler, G., "Prediction of Vehicle Steering System NVH from Component-Level Test Data," SAE Technical Paper 2006-01-0483, 2006, https://doi.org/10.4271/2006-01-0483.Also In
References
- Triches, M. Cordioli, J. A. Gerges, S. N. Y. “Analysis of Moan and Whine Noise Generated by Hydraulic Pumps of Power Steering Systems,” SAE Paper Number 2003-01-3581
- Rohilla, A. Qatu, M. “Finite Element Vibration Studies of As-Installed Power Steering Pumps” SAE 2003-01-1671
- Williams, Jeffrey S. Steyer, Glen C. “Experimental Noise Path Analysis for Problem Identification in Automobiles” Proceedings of the IMAC XIII 1995
- Williams, J. S. Steyer, G. S. Ditman, J. “Transmission Tonal Noise: Experimental Analysis of the NVH Characteristics which Influence Vehicle Sound Quality” Proceedings. of the IMAC XIV 1996
- Carbary, K. Ulep, D. Witczak, R. Grenier, G. Dong, J. Steed, B. “Power Steering Pump Sound Quality and Vibration - Test Stand Development” SAE 2003-01-1662
- Lord, H. Gatley, W. Evensen, H. “Noise Control for Engineers” Krieger Publishing Company 1980
- “Acoustics - Determination of sound power levels of noise sources using sound pressure - Precision methods for anechoic and hemi-anechoic rooms”