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A Systematic and Disciplined Process for Developing Drive Files for Squeak and Rattle and Durability Tests in the Lab
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
The pressure to shorten vehicle product development time-to-launch means more in-lab tests must be performed earlier, and before vehicle prototypes are available for road or test track evaluations. Squeak and Rattle (S&R) evaluations of subsystems/modules and components must be performed using realistic road excitation conditions. How S&R performance degrades as the vehicle, module or component accumulates customer miles or kilometers must be assessed before the design is frozen. Durability tests must be performed earlier in the design/development timeline as well.
All these pressures point to having a systematic, disciplined and streamlined methodology or protocol for acquiring and processing road vibration data useful for S&R and durability tests. The protocol must comprehend data acquisition, sampling, and signal processing; properly editing acceleration time histories for either in-lab replication as time histories or as PSD random vibration; creation of drive files that replicate multiple road surfaces; combining multiple road surfaces and speeds into fewer (if not one) tests that replace one-test-for-one-road-condition approaches; selecting overall vibration amplitudes for composite multiple roads; and performing such tests in order to satisfy S&R and durability experts, design/release engineers seeking design validation, and multiple other stakeholders.
This paper presents such a protocol based on the expertise from different engineers working on a multitude of vehicle development programs from different companies in different countries over many years.
CitationPeterson, E. and McCormick, R., "A Systematic and Disciplined Process for Developing Drive Files for Squeak and Rattle and Durability Tests in the Lab," SAE Technical Paper 2009-26-0048, 2009, https://doi.org/10.4271/2009-26-0048.
- “Improving the Reliablity of Squeak and Rattle tests” SAE Paper No. 2005-01-2539