A test rig which replicates a one quarter vehicle of a rear wheel drive vehicle, including the suspension system, is used to investigate a low frequency noise. The cross beam is included along with the vehicle suspension spring which is loaded against a sprung loaded mechanism which represents the tyre stiffness exactly and supports the brake geometrically as the tyre would. Drive to the drum is from a DC motor through the wheel drive axle.Holographic Interferometry is used to observe the modes of vibration of the drum with mirrors strategically placed to observe additional features such as the backplate, spring pan and cross beam.Initial results show the mode of vibration of the backplate to be of a diametral mode order and to be moving in the direction of drum rotation. Additionally it is seen that the spring pan and cross beam exhibit high amplitudes of vibration.Additional tests are then undertaken with the suspension members omitted and the brake arranged to allow visual access to the brake shoes.
An Investigation of Low Frequency Drum Brake Noise
Sae Technical Papers
Annual Brake Colloquium And Engineering Display ; 1998
1998-09-20
Aufsatz (Konferenz)
Englisch
An Investigation of Low Frequency Drum Brake Noise
British Library Conference Proceedings | 1998
|Suspension related low frequency rear drum brake noise
Kraftfahrwesen | 1991
|Suspension Related Low Frequency Rear Drum Brake Noise
SAE Technical Papers | 1991
|Low Frequency Drum Brake Noise Investigation Using a 1/4 Vehicle Test Rig
SAE Technical Papers | 2000
|Low frequency drum brake noise investigation using a 1/4 vehicle test rig
Kraftfahrwesen | 2000
|