Operational transfer path analysis: Theory, guidelines and tire noise application

• Published in: Mechanical systems and signal processing Vol. 24; no. 7; pp. 1950 - 1962
• Main Authors: de Klerk, D., Ossipov, A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Kidlington Elsevier Ltd 01.10.2010; Elsevier
• Subjects: Acoustics; Analogies; Automotive components; Boundary conditions; Coherence; Cross talk cancelation; CTC; Exact sciences and technology; Experimental dynamics; Fundamental areas of phenomenology (including applications); Guidelines; Measurement and testing methods; Mechanical systems; MIMO; Noise; Operational transfer path analysis; OTPA; Physics; Solid mechanics; Structural acoustics and vibration; Structural and continuum mechanics; Tire noise; Tires; Vehicles; Tire noise; OTPA; CTC; Experimental dynamics; Operational transfer path analysis; MIMO; Cross talk cancelation; MIMO system; Path analysis; Modal analysis; Input signal; Similarity; Noise reduction; Crosstalk; Knowledge base; Similarity solution; Experimental study; Modeling; Tyre; Coherence; Strength; Structural acoustics; Singular value decomposition
• ISSN: 0888-3270; 1096-1216
• DOI: 10.1016/j.ymssp.2010.05.009

The operational transfer path analysis (OTPA) method is the subject of research in this article, which starts with a discussion on it's theory. Here clear similarities with the MIMO technique in experimental modal analysis are found. Based on the knowledge of MIMO, one finds that input signals are allowed to be coherent to a certain extend. As coherence can be larger in OTPA in practice, the method is extended with the singular value decomposition method to reduce influences of noise. The article proceeds with a discussion on points of attention, or boundary conditions, in practical applications. An analysis on tire noise is included to illustrate the points of attention and the methods strength in, for example, vehicle TPA on tires.