Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Squeal Test Using Lab-Scale Brake Dynamometer for Pad Angle and Negative-slope

랩스케일 브레이크 다이나모 메터를 이용한 패드각도 및 음의 기울기에 따른 스퀼 소음 실험 연구

  • Nam, Jae-Hyun (Division of Automotive & Mechanical Engineering, Kongju National University) ;
  • Cho, Byung-Jae (Division of Automotive & Mechanical Engineering, Kongju National University) ;
  • Kang, Jae-Young (Division of Automotive & Mechanical Engineering, Kongju National University)
  • 남재현 (공주대학교 기계공학부) ;
  • 조병제 (공주대학교 기계공학부) ;
  • 강재영 (공주대학교 기계공학부)
  • Received : 2013.04.23
  • Accepted : 2013.07.11
  • Published : 2013.07.31
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Abstract

In this study, squeal noise test was conducted by using the lab-scaled brake dynamometer. Squeal conditions with respect to the angle of the brake pads ($34^{\circ}30^{\circ}26^{\circ}$) and negative slope, were studied. Squeal frequency of the In-plane-like mode was confirmed by hammering test and finite element analysis. This Squeal mode was difficult to control by the pad angle variation. Also the squeal sound was found to be periodic signal which has higher harmonic components. Squeal noise is independent of the negative slope. It implies that squeal noise can reach the stick-slip oscillation.

본 연구에서는 회전속도, 브레이크 압력 제어가 가능한 브레이크 다이나모메타를 제작하여 스퀼 소음 실험을 실시하였다. 브레이크 패드는 각각 $34^{\circ}$, $30^{\circ}$, $26^{\circ}$로 가공하여 패드 각도에 따른 스퀼 발생 조건과 음의 기울기 발생에 따른 스퀼 연관성을 연구 하였다. 각도에 따라 특정한 회전속도와 브레이크 압력에서 스퀼이 발생하였으며, 각도에 상관없이 하모닉 성분을 가지는 특정 주파수 소음을 발견하였다. 햄머링 테스트 및 유한요소해석을 통해서 특정 주파수는 In-plane모드 성격을 갖고 있으며, 패드 각도에 둔감한 모드임을 밝혀냈다.

Keywords

References

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