Brake squeal is currently seen as perhaps the most serious operational braking problem, particularly on passenger cars, but also increasingly on heavy goods vehicles. Although much progress has been made in understanding the fundamental mechanisms of squeal, its application to the design of quiet brake system and the simplicity of the predictive models which have been developed. The work described here brings together experimental modal analysis measurements of squealing brakes and simple binary flutter stability modelling to develop a potentially generally applicable solution to a range of squeal problems. A novel modal analysis technique is developed for the measurement of rotor modes showing stationary complex meridian modes of a form compatible with a binary flutter mechanism for squeal. The inherent rotational symmetry of most brake rotors is shown to be a pre-requisite for the occurrence of such modes and hence for flutter instability, and the conditions for reducing this symmetry are examined. Finite element modelling is used to examine the practical problems of reducing brake rotor symmetry, and the effect of applying the technique to real brakes is evaluated and found to reduce or eliminate relevant squeal problems.
Brake squeal - the influence of rotor geometry
Bremsquietschen - Einfluß der Rotorgeometrie
1993
11 Seiten, 12 Bilder, 3 Tabellen, 12 Quellen
Conference paper
English
Brake squeal - the influence of rotor geometry
Automotive engineering | 1993
|TIBKAT
|Disc Brake Rotor Squeal Suppression Using Dither Control
SAE Technical Papers | 2001
|Automotive engineering | 1999
|