A comparison of anthropomorphic model responses of human hand-arm system

Sinha, K. K.; Shanker, A.

Affiliations

¹Institute of Technology, Banaras Hindu University Varanasi-221005, India

Abstract

The present paper deals with a comparison of vibratory responses of anthropomorphic model of hand-arm system with other models. In anthropomorphic modelling hand-arm system is considered to be made of number of segments of certain standard geometrical shapes. A seventeen segmented anthropomorphic model of hand-arm system has been proposed in which hand-arm system has been divided in upper arm, lower arm, palm and fingers. Further the fingers have been divided in namely distal phalanx, middle phalanx and proximal phalanx and the segments are considered to be of ellipsoidal shape. Corresponding to the seventeen segmented anthropomorphic model a seventeen degree of freedom vibratory model of hand-arm system has been developed. Based on certain assumptions (2003) the mass, stiffness and damping values of different elements of the model has been determined. The damping values of the elements of the vibratory model have been found by first obtaining the damping ratio values of the different segments of the anthropomorphic model and analyzing this. The damping ratio values of the segments of anthropomorphic model have been found experimentally by finding the frequency response of these segments and analysing this. Response of the whole hand-arm model has been obtained theoretically and experimentally and has been analysed and compared with other models.

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