STUDYING SOURCES OF BRAKE NOISE WITH COHERENT OPTICAL AND HOLOGRAPHIC MEASURING TECHNIQUES

The analysis of vibrations on squealing brake systems by optical measuring techniques is described. Laser doppler velocimetry, image derotation and holographic interferometry are considered. The localization of noise sources and quantitative measurement of elaborated vibration centers by the laser doppler technique on rotating and nonrotating components is described. Applications of these methods to prevent brake squeal of disk and drum brakes are demonstrated.

• Supplemental Notes:
  • Presented at the Intern. Symp. On Transportation Noise, Pretoria, 21-23 Oct. 1981.
• Corporate Authors:

  Volkswagenwerk

  ,    

  National Aeronautics and Space Administration

  600 Independence Avenue, SW
  Washington, DC  United States  20546
• Authors:
  • FELSKE, A
• Publication Date: 1981

Media Info

• Pagination: 16 p.

Subject/Index Terms

• TRT Terms: Acoustic measuring instruments; Acoustics; Braking; Disc brakes; Holography; Lasers; Noise sources; Optical measurement
• Uncontrolled Terms: Drum brakes
• Old TRIS Terms: Acoustic measurement; Laser applications
• Subject Areas: Highways; Public Transportation; Vehicles and Equipment; I95: Vehicle Inspection;

Filing Info

• Accession Number: 00377779
• Record Type: Publication
• Source Agency: National Technical Information Service
• Files: TRIS
• Created Date: Oct 30 1983 12:00AM