Browse Publications Technical Papers 2002-01-2608
2002-10-06

Brake Rattle: Vibration and Noise Testing 2002-01-2608

The continuous decrease in background noise levels inside vehicles has made other noise sources easily noticeable. Specifically, foundation brake rattle noise is a growing concern to the customer. This brake rattle is primarily due to rigid body impact between brake components. Currently, vehicle and brake manufacturing companies use different testing procedures to evaluate brake rattle that include laboratory vibration shakers, full vehicle shakers (four post), chassis dynamometers and vehicle road testing. These evaluations are subjective in most cases. A method is needed to replicate and quantify vehicle brake rattle in the laboratory to help determine the acceptability of a brake system at a component level. This approach would also help to identify the root cause for brake rattle and evaluate design changes to address that rattle. Some guidelines for better quantifying brake rattle using shakers will be proposed in this paper.

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