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Název:
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Predicting subjective perceptions of powered tool torque reactions |
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Další názvová informace:
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Překlad:
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Predikce subjektivního vnímání reakcí na točivý moment |
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Autor:
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Lin, Jia-Hua
McGorry, Raymond W. |
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Klíčové slovo:
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modely matematické
predikce
expozice
nářadí elektrické |
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Anotace:
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Powered hand tools have the potential to produce reaction forces that may be associated with upper extremity musculoskeletal disorders. In this study, subjective ratings of discomfort and acceptability of reaction forces were collected in an attempt to identify their associations with factors such as work location, and response covariates such as grip force and tool handle displacement. Three work configurations using pistol grip and right angle pneumatic nutrunners on horizontal and vertical surfaces were set up in the laboratory. Twenty healthy right-handed male participants operated four tools at nine locations and the corresponding subjective responses were collected. The results indicate that normalized grip force during the torque buildup period was a significant factor for both subjective ratings. For the unacceptable torque reactions across the three tool configurations, the ratio of hand moment impulse over tool torque impulse was significantly greater than for the acceptable reactions. For pistol grip tools used on the vertical surface, as the working height increased 30 cm, the odds of an unacceptable rating over an acceptable rating increased 1.6 times. Prediction models for subjective ratings of discomfort and acceptability provide insight regarding either workstation design or exposure control. These models can further be used to establish exposure limits based on handle displacement and grip force. |
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Jazyk dokumentu:
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eng |
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Název zdroje:
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Applied Ergonomics |
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Ročník:
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40 |
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Číslo:
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1 |
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Rozsah (stránky):
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s. 47-55 |
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Rok vydání:
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2009 |
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Publikováno na URL:
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Připojené soubory:
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 lin |
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