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A Systematic and Disciplined Process for Developing Drive Files for Squeak and Rattle and Durability Tests in the Lab
Technical Paper
2009-26-0048
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SIAT 2009
Language:
English
Abstract
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.
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Citation
Peterson, 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.Also In
References
- “Improving the Reliablity of Squeak and Rattle tests” SAE Paper No. 2005-01-2539