An overview of brake noise and vibration problems

Brake noise and vibration is a principal braking quality attribute that has attracted a significant number of engineering investigations. As a result, many articles are available to NVH (Noise, Vibration, and Harshness) engineers on evaluation, understanding, and designing against brake noise and vibration. This paper attempts to collect the published material about brake judder and present it as an organized accumulation of the efforts of the authors of the surveyed articles. Low frequency noise problems are described and categorized according to the underlying phenomena that create them. Current efforts in the area of computer simulation, dynamometer testing and road testing of brake squeal are also summarized.