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A Visual Experimental Noise Investigation of a Twin Calliper Disc Brake
Technical Paper
2000-01-2771
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A twin calliper brake system is investigated using the whole body visual technique of holographic interferometry. It is shown that the disc mode of vibration has a preferred position where a disc antinode is situated under one calliper and a disc node under the second calliper. The maximum angular space occupied by the pad antinode is, as predicted by the theoretical study of the disc/pad interface geometry, the angle subtended by the pad length. For a four-piston opposed calliper the minimum distance is slightly larger than the piston centers. There is evidence that the disc mode position, in relation to the two callipers, may be antinode/node, node/node or antinode/antinode. With these arrangements an accompanying revised theoretical study of the disc/pad interface geometry predicts two stable conditions are possible - if the callipers are positioned either at an angle between 125° to 130° or 165° to 175°. The smaller angle was not tested but the brake became quiet at angles greater than 166°. A brief study of the calliper modes and pad spring retainer is included in the holographic results.
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Citation
Fieldhouse, J. and Beveridge, C., "A Visual Experimental Noise Investigation of a Twin Calliper Disc Brake," SAE Technical Paper 2000-01-2771, 2000, https://doi.org/10.4271/2000-01-2771.Data Sets - Support Documents
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References
- Fieldhouse J.D. “A Proposal to Predict the Noise Frequency of a Disc Brake Based on the Friction Pair Interface Geometry” SAE Brake Colloquium and Engineering Display SAE Paper number 1999-01-3403
- Fieldhouse J.D. Newcomb T.P. Optics and Lasers in Engineering 25 6 “Optical Sensors for Automotive Applications” December 1996 0143-8166(95)00094-1 455 494 “Double Pulsed Holography Used to Investigate Noisy Brakes” The Rover Group
- Fieldhouse J.D. Newcomb T.P. “Holographic Interferometry used to Investigate the Influence of Pad and Calliper Geometry on Disc Brake Noise” 1996 SAE Brake Colloquium & Engineering Display 13 - 17 October 1996 New Orleans