This content is not included in your SAE MOBILUS subscription, or you are not logged in.
A Novel Transfer Path Analysis Method Delivering a Fast and Accurate Noise Contribution Assessment
ISSN: 0148-7191, e-ISSN: 2688-3627
Published January 21, 2009 by The Automotive Research Association of India in India
Annotation ability available
Event: SIAT 2009
Since its first publication in the beginning of the eighties, Transfer Path Analysis (TPA) has evolved into a widely used tool for noise and vibration troubleshooting and internal load estimation, and this for single source as well as multivariate problems. One of the main bottlenecks preventing its even more widespread use in the actual vehicle development process is the test time to build the full data model, requiring not only in-operation tests but also extensive Frequency Response Function tests.
As a consequence, several new approaches have appeared over the past years attempting to circumvent this limitation, such as Fast and Multilevel TPA and Operational TPA. The latter method attracts quite some attention as it only requires operational data measured at the path references and target locations. However, being a transmissibility method as known from structural dynamics, its application requires special care to overcome the related ill-conditioning and missing-reference-sensitivity problems and it essentially leads to assessing a co-existence relationship between target responses and path references and does not allow to draw causality conclusions in terms of paths. Hence a new approach is proposed, using a parametric model for the estimation of loads. This makes the method scalable, enabling the engineer to use a simpler model based on a small amount of measurement data for quick troubleshooting or increase accuracy by using a more complex model together with additional measurements.
CitationJanssens, K., Mas, P., Gielen, L., Gajdatsy, P. et al., "A Novel Transfer Path Analysis Method Delivering a Fast and Accurate Noise Contribution Assessment," SAE Technical Paper 2009-26-0047, 2009, https://doi.org/10.4271/2009-26-0047.
- Bendat, J. S Piersol, A. G. “Engineering Applications of Correlation and Spectral Analysis” Wiley New York 1980
- Verheij, J. “Multipath Sound Transfer from Resiliently Mounted Shipboard Machinery” PhD Dissertation, Technische Physische Dienst TNO-TH, Delft 1986
- De Vis, D. Hendricx, W Van Der Linden, P. “Development and Integration of an Advanced Unified Approach to Structure Borne Noise Analysis” 2nd Int. Conference on Vehicle Comfort ATA 1992
- Van Der Linden, P., et al. “Determination of the Noise Contributions of Engine Surfaces” Proc. of SAE Noise and Vibration Conf., US, 2001, paper 2001-01-1482
- Van Der Linden, P De Meester, K “Airborne Source Strength Measurements on the Basis of Pressure Indicator Inversion Applied to an Engine Valve Cover” 4th ICSV conf. St-Petersburg 1996
- Verheij, J. “Experimental Procedures for Quantifying Sound Paths to the Interior of Road Vehicles” Proc. 2nd Int. Conference on Vehicle Comfort Bologna, Italy Oct. 14–16 483 491 1992
- Starkey, J Merril, G “On the ill-Conditioned Nature of Indirect Force Measurement Techniques” Int. J. Analyt. Experim. Modal Anal. 4 3 103 108 1989
- Freymann, R Stryczek, R. “Noise Path Analysis and Optimization” Proc. Unikeller Conf. 95 Zurich 1995
- Van Der Linden, P Floetke, H “Comparing Inverse Force Identification and Mount Stiffness Force Identification Methods for Noise Contribution Analysis” Proc. ISMA 2004 Leuven, Belgium
- Mas, P. Sas, P Wyckaert, K. “Indirect Force Identification Based Upon Impedance Matrix Inversion: A Study on Statistical and Deterministical Accuracy” Proc. 19th ISMA Conf. Leuven, Belgium 1994
- Noumura, K Yoshida, J “Method of Transfer Path Analysis for Vehicle Interior Sound with no Excitation Experiment” Proc. FISITA 2006, F2006D183 Yokohama, Japan 2006
- Van Der Auweraer, H. et al. “Transfer Path Analysis in the Critical Path of Vehicle Refinement: the Role of Fast, Hybrid and Operational Path Pnalysis” Proc. SAE Noise and Vibration Conf., SAE Paper No. 2007-01-2352
- Maia, N. M. M. Silva, J. M. M Ribeiro, A. M. R. “The Transmissibility Concept in Multi-Degree-of-Freedom Systems” Mechanical Systems & Signal Processing 15 1 129 137 2001
- Ewins, D Liu, W “Transmissibility Properties of MDOF Systems” Proc. 16th IMAC Santa Barbara (CA) 847 854 1998
- Gajdatsy, P. et al. “Critical Assessment of Operational Path Analysis: Effect of Coupling Between Path Inputs” Acoustics 08 Conf. Paris, France 2008
- Gajdatsy, P., et al. “Critical Assessment of Operational Path Analysis: Mathematical Problems of Transmissibility Estimation” Acoustics 08 Conf. Paris, France 2008
- Gajdatsy, P., et al. “Critical Assessment of Operational Path Analysis: Effect of Neglected Paths” ICSV Conf. Daejeon, Korea 2008
- Janssens, K. Gajdatsy, P Van Der Auweraer, H. “Operational Path Analysis: a Critical Review” ISMA Conf. Leuven, Belgium 2008