Journal of Occupational Health
Online ISSN : 1348-9585
Print ISSN : 1341-9145
ISSN-L : 1341-9145
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New regression model for predicting hand-arm vibration (HAV) of Malaysian Army (MA) three-tonne truck steering wheels
Shamsul Akmar Ab Aziz Mohd Zaki NuawiMohd Jailani Mohd Nor
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2015 Volume 57 Issue 6 Pages 513-520

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Abstract

Objective: The objective of this study was to present a new method for determination of hand-arm vibration (HAV) in Malaysian Army (MA) three-tonne truck steering wheels based on changes in vehicle speed using regression model and the statistical analysis method known as Integrated Kurtosis-Based Algorithm for Z-Notch Filter Technique Vibro (I-kaz Vibro). Methodology: The test was conducted for two different road conditions, tarmac and dirt roads. HAV exposure was measured using a Brüel & Kjær Type 3649 vibration analyzer, which is capable of recording HAV exposures from steering wheels. The data was analyzed using I-kaz Vibro to determine the HAV values in relation to varying speeds of a truck and to determine the degree of data scattering for HAV data signals. Results: Based on the results obtained, HAV experienced by drivers can be determined using the daily vibration exposure A(8), I-kaz Vibro coefficient (Ƶv), and the I-kaz Vibro display. The I-kaz Vibro displays also showed greater scatterings, indicating that the values of Ƶv and A(8) were increasing. Prediction of HAV exposure was done using the developed regression model and graphical representations of Ƶv. The results of the regression model showed that Ƶv increased when the vehicle speed and HAV exposure increased. Discussion: For model validation, predicted and measured noise exposures were compared, and high coefficient of correlation (R2) values were obtained, indicating that good agreement was obtained between them. By using the developed regression model, we can easily predict HAV exposure from steering wheels for HAV exposure monitoring.(J Occup Health 2015; 57: 513–520)

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2015 by the Japan Society for Occupational Health
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