Journal of the Ergonomics Society of Korea (대한인간공학회지)

Ergonomics Society of Korea (대한인간공학회)
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An Analysis of Transmitted-Vibration Characteristics by Different Wrist Posture during Grinding Tasks

그라인딩 작업시 손목자세별 국소진동 전달특성 분석

  • Hwang, Seong-Hwan (Instrumentation & Control Human Factors Division, KAERI) ;
  • Lee, Dong-Choon (Department of Industrial & Management Systems Engineering, Dong-A University)
  • 황성환 (한국원자력연구소 계측제어.인간공학연구부) ;
  • 이동춘 (동아대학교 산업경영공학과)
  • Published : 2007.02.28
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Abstract

This study was performed to evaluate the characteristics of transmitted vibration to hand-arm system under different work posture while operating a light-weighted powered hand grinder. For the experiment, 8 different types of wrist posture (natural, unlar-flexion, radual-flexion, flexion, extension, complex posture, and etc.) and 3 types of feed force (20[N], 50[N], 70[N]) were considered. 10 male subjects were employed to polish metal plate with a hand grinder. All of them were normal and healthy with no history and symptom of the work related musculoskeletal disorders in the dominant hand. Vibration acceleration data were recorded with sampling rate, 2048[Hz]. In addition, unweighted overall R.M.S. acceleration at the tool and wrist, and transmissibility between them were used to evaluate factors from the recorded tri-axial vibration acceleration. The results indicate that transmissibility of natural wrist posture was significantly higher than others. In addition, as the feed force becomes larger, the vibration was transmitted in large quantities to hand-arm system through radius.

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References

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Cited by

  1. Trend of Human Vibration Research in Korea vol.32, pp.4, 2013, https://doi.org/10.5143/JESK.2013.32.4.293