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Characterization of disk brake noise behavior via measurement of friction forces
Author(s) -
Schlagner Stefan,
von Wagner Utz
Publication year - 2009
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200910016
Subject(s) - disc brake , brake , noise (video) , instability , vibration , work (physics) , actuator , brake pad , mechanics , characterization (materials science) , materials science , dynamical friction , mechanical engineering , control theory (sociology) , acoustics , structural engineering , engineering , physics , computer science , electrical engineering , nanotechnology , composite material , control (management) , artificial intelligence , image (mathematics)
Squealing of disk brakes is a major problem in the field of vehicle design. It is commonly acknowledged, that this squeal is initiated by instability due to friction forces between the pads and the disk, leading to self excited vibrations. This work addresses the mechanical work of these friction forces in order to draw conclusions for the investigation of the noise behavior of disk brakes. Therefore a multi degree of freedom model is used to compare its stability behavior with the frictional work at the pads. The results obtained are applied to experiments in which, on the one hand brake pads with integrated piezoceramic actuators cause a broad band excitation and, on the other hand, dynamic pad velocities/accelerations and friction forces are measured. (© 2009 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)