Quantification of brake creep groan in vehicle tests and its relation with stick–slip obtained in laboratory tests

This paper describes the development of a methodology for assessing and correlating stick–slip and brake creep groan. For doing that, results of tribotests are compared to data obtained in vehicle tests. A low velocity and a linear reduction in normal force were set for the tribotests. The vehicle t...

Full description

Saved in:
Bibliographic Details
Published in:Journal of sound and vibration 2016-05, Vol.369, p.63-76
Main Authors: Neis, P.D., Ferreira, N.F., Poletto, J.C., Matozo, L.T., Masotti, D.
Format: Article
Language:English
Subjects:
Acceleration
Automotive wheels
Brakes
Creep (materials)
In vehicle
Ramps
Slopes
Vehicles
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper describes the development of a methodology for assessing and correlating stick–slip and brake creep groan. For doing that, results of tribotests are compared to data obtained in vehicle tests. A low velocity and a linear reduction in normal force were set for the tribotests. The vehicle tests consisted of subjecting a sport utility vehicle to three different ramp slopes. Creep groan events were measured by accelerometers placed on the brake calipers. The root mean square of the acceleration signal (QRMS parameter) was shown to be able to measure the creep groan severity resulting from the vehicle tests. Differences in QRMS were observed between front-rear and left–right wheels for all tested materials. Frequency spectrum analysis of the acceleration revealed that the wheel side and material type do not cause any significant shift in the creep groan frequency. QRMS measured in the vehicle tests presented good correlation with slip power (SP) summation. For this reason, SP summation may represent the “creep groan propensity” of brake materials. Thus, the proposed tribotest method can be utilized to predict the creep groan severity of brake materials in service. •Vibration resulting from tribotests is compared to data obtained in vehicle tests.•Three brake materials are ranked in propensity and severity of creep groan noise.•Front-rear and left–right wheels exhibit differences in the intensity of vibration.•Wheel side and material type does not cause any shift in the frequency spectrum.•The proposed tribotests can predict the creep groan severity of brake materials.
ISSN:0022-460X
1095-8568
DOI:10.1016/j.jsv.2016.01.036