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Squeak & Rattle Correlation in Time Domain using the SAR-LINE™ Method
Journal Article
2012-01-1553
ISSN: 1946-3995, e-ISSN: 1946-4002
Sector:
Topic:
Citation:
Weber, J. and Benhayoun, I., "Squeak & Rattle Correlation in Time Domain using theSAR-LINE™ Method," SAE Int. J. Passeng. Cars - Mech. Syst. 5(3):1124-1132, 2012, https://doi.org/10.4271/2012-01-1553.
Language:
English
Abstract:
A new Squeak & Rattle simulation method was presented at the
ISNVH conference 2010 (SAE 201-01-1423). This method, called the
SAR-LINE™ method, is based on the evaluation of the relative
displacement in time domain due to a random load. A specific
challenge for a Squeak & Rattle simulation approach is to
correlate the results to a real squeak or rattle phenomenon. This
paper presents a new test procedure which enables the correlation
between the results of the SAR-LINE™ simulation and the audible
rattle occurrence. Three different configurations with increasing
complexity were both tested and simulated. A pseudo random signal
was used as load and the relative displacement was measured with
the Laser Scanning Vibrometer in time domain. The movement in the
gap and the rattle sound were recorded in a video sequence. The
simulated results along the SAR line can directly be compared with
the measured results along the gap. It is shown how the correlation
between the rattle occurrence and the simulation results can be
performed with the statistical evaluation approach of the
SAR-LINE™ method. Beyond this the paper presents also the
definition of a new output parameter which can be used for the
squeak correlation. The new parameter includes both the time aspect
and the main squeak direction which enables the comparison between
the squeak occurrence measured with a stick-slip test machine and
the simulated results. This type of Squeak & Rattle correlation
increases clearly the capability of the SAR-LINE™ method, which
is even more important when prototypes are no longer available
during the design process.