• Title/Summary/Keyword: Rattle Noise

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A Study on the Clutch Damper Design Technique (클러치 댐퍼 설계 기법 연구)

  • 안병민;장일도;최은오;홍동표;정태진
    • Journal of KSNVE
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    • v.7 no.6
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    • pp.1031-1037
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    • 1997

  • The main torsional vibration source of the driveline is the fluctuation of the engine torque. The gear rattle is generated by an impact in the backlash due to this torsional vibration. Optimization of the clutch torsional characteristic is one of the effective methods to reduce the idle gear rattle. Many researches have been reported on this problem but only few of them give sufficient consideration to the detail clutch modeling and clutch design parameters (stiffness, hysteresis torque, preload, first stage length). This paper pays attention to the gear impact mechanism and clutch design parameters to reduce the idle gear rattle with computer simulation.

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A Study on BSR Noise and Sound Quality Property for Vehicle Interior Module (자동차 인테리어 모듈의 BSR 소음과 음질 특성 연구)

  • Shin, Su-Hyun;Cheong, Cheol-Ung;Jung, Sung-Soo;Kang, Dae-Hwan
    • Transactions of the Korean Society for Noise and Vibration Engineering
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    • v.22 no.6
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    • pp.550-555
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    • 2012

  • Among the various elements affecting a customer's evaluation of automobile quality, buzz, squeak and rattle(BSR) have been considered to be major factors. In most vehicle manufacturers, the BSR problems are solved by find-fix method with the vehicle road test, mainly due to various excitation sources, complex generation mechanism and subjective response. To systematically tackle the BSR problems in early stage of the vehicle development cycle, these difficulties should be resolved. The aim of the present paper is to characterize the sound quality property of BSR noise that can be used to assess the subjective responses to BSR. The four sound metrics from Zwicker's sound quality parameter are computed for the signals recorded for eight BSR noise source regions localized by using the acoustic-field visualized results. Then, the jury test of BSR noise are performed. On the basis of the computed sound metrics and jury test result is evaluated to represent the harshness of BSR noise. It is expected that the developed BSR measuring system and sound quality properties can be used to reduce the automotive interior BSR noise in terms of subjective levels as well as objective levels.

  • https://doi.org/10.5050/KSNVE.2012.22.6.550 인용 PDF KSCI

Development of Rattle and Squeak Detection Methodology Considering Characteristics of Road Vibration Input (차량 부품의 노면 가진 특성을 고려한 래틀과 스퀵 현상 검출 방법의 개발)

  • Lyu, Su Jung;Jun, In Ki;Choi, Jae Min;Lee, Won Ku;Woo, Jae Chul
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.37 no.5
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    • pp.679-683
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    • 2013

  • BSR noise emerges in a vehicle as a result of road vibrations, engine vibrations, and speaker vibrations. BSR noise occurs with an irregular impact or stick slip friction phenomenon as the influence of the resonance mode when the vibration input load is transferred along poor joint and contacting pairs of the system. A sub-structure method of finite element analysis is required to detect impacts and slip in the full vehicle model. This study presents a method for sub-structure modeling and a rattle and squeak detection methodology that considers the characteristics of road vibration inputs.

  • https://doi.org/10.3795/KSME-A.2013.37.5.679 인용 PDF KSCI