A methodology for integrated performance analyses of vibration reducing gloves

Abstract

This study proposes a methodology for evaluating the integrated performance of vibration reducing (VR) gloves considering four measures. These include manual dexterity, distributed palm and fingers vibration transmission and grip strength preservation, which generally pose conflicting design requirements. The weights for the conflicting performance measures are identified for the given work conditions, classified according to the frequency ranges of predominant tool handle vibration (low and high), as defined in ISO-10819 together with the assembly/disassembly tasks. An index of weighted measures is formulated for identifying the most desirable VR glove for the given work condition. The results showed the greatest weighting for the fingers vibration response for high-frequency vibration spectra. Higher weightings for palm vibration and muscles' activity, were obtained for low-frequency vibration spectra, while the weighting for manual dexterity increased when coupled with manual tasks. An integrated performance index is identified and applied to rank nine different VR gloves and a conventional glove with known individual performance measures for identifying the most desirable glove. The vibration reducing gloves included: five gloves with gel vibration isolation materials, denoted as gel1, …, gel5; two gloves with air bladder vibration isolation material, denoted as air1 and air2; one hybrid glove comprising air pocket vibration isolation material in the palm region and gel in the fingers regions, denoted as hybrid; and a rubber glove. The gel2, air2 and hybrid gloves, made of air bladder or viscoelastic gels, showed superior integrated performance for high- and low-frequency vibration spectra among the ten alternatives. The fabric and rubber gloves revealed best integrated performance for the multiple tasks in conjunction with the low-frequency vibration spectrum.