Development of Brake Squeal Noise Robustness Index and Improve Noise Tuning Efficiency Using Friction Induced Modal

NVH is one of the important factors in automobile development. Brake squeal noise, in particular, is an important indicator of perceived quality of automobile. Squeal noise, one of the most difficult factors in automobile brake development, is noise caused by the complex interaction of friction characteristics, caliper behavior, frequency characteristics and environmental conditions. Therefore, it is not easy to come up with an effective improvement plan in a short time. The purpose of this study is to develop a new evaluation method to improve the squeal noise of the brake caliper system and to select the FIM index, which is the standard for objective numerical analysis. The newly developed Friction Induced Modal Method is an evaluation method that uses an inertia noise dynamometer to control the environment and braking conditions in the same way as the squeal noise conditions generated in the field, and to analyze the NVH characteristics of brake calipers. In conclusion, measurement and index analysis method standardized to obtain objective values of squeal noise characteristics. After that, Five car models were selected to confirm their effectiveness, and FIM applied to newly developed car models to dramatically shorten the squeal tuning period and the number of noise dynamometer evaluations.