Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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System Mode and Sensitivity Analysis for Brake Judder Reduction

브레이크 저더 개선을 위한 시스템 모드분석 및 민감도해석

  • Hwang In-Jin (Hyundai Motor Company & Kia Motor Corporation) ;
  • Park Gyung-Jin (Division of Mechanical and Information Management Engineering, Hanyang University)
  • Published : 2005.11.01
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Abstract

The brake judder is a phenomenon that the steering wheel is abnormally vibrating when the car is braked at a high speed. It is classified by the cold and the hot judder. The former is generated due to the initial uneven disk surface and the latter is resulted from the uneven heat spots on disc surface by repeatedly braking. There are two ways to reduce the judder. One is to control vibration by modification of the disk shapes and pad ingredients. The other is to improve modal characteristics of the suspension system. The latter approach is used in this research. In this paper, the real vehicle test and computer simulation are considered to systematically understand the judder phenomenon of the vehicle. The Macpherson strut suspension is employed. Especially, the judder sensitivity is calculated based on design sensitivity analysis. A bush stiffness was reworked and braking test was done to verify the sensitivity result. The judder reduction by the mode control was verified.

Keywords

References

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