Brake NVH is nowadays a first priority in braking system development for OEMs and Tier1 suppliers. Cheap and reliable solutions are constantly researched for identification and analysis of brake NVH phenomena.
An innovative procedure for brake NVH durability testing has been developed by Applus+ IDIADA in order to investigate noise events during braking. An acquisition system (dbBrake) and software (dbSoft) have been developed with the aim of analyzing high and low frequency noise during braking and carrying out an automatic analysis of occurrence, frequency and SPL (Sound Pressure Level) of brake noise. Noise can be triggered using different parameters. Brake line pressure, temperature and speed conditions are also automatically recorded and analyzed when noise occurs
In order to corroborate the objective results logged by dbBrake system, the correlation with subjective evaluation from expert drivers is also automatically carried out.
This presentation focuses on the development and integration of the procedure, and gives a brief overview on the results achieved so far. The methodology has been validated in different testing environments (Southern Spain, Other European Locations, Asia, and South America). Based on the experience of IDIADA's Braking Systems Department, reliable and effective results have been achieved for brake noise investigation and problem solving.