Estimating functional reach envelopes for standing postures using digital human model

Selvan, KE and Sen, D (2020) Estimating functional reach envelopes for standing postures using digital human model. In: Theoretical Issues in Ergonomics Science, 21 (2). pp. 153-182.

PDF the_iss_erg_21-2_153-182_2020.pdf - Published Version Restricted to Registered users only Download (2MB) | Request a copy

Abstract

A computational method for estimating the functional reach envelopes for standing postures using Digital Human Model (DHM) is presented. A DHM that embodies a static-stability model based on Functional Stability Region (FSR), a biomechanics based postural effort model, and uses non-linear programming for predicting reach is first described. The model was used for computing 3D partial reach surfaces for different standing reach strategies such as one-leg standing and two-leg standing with varying foot positions. Experiments were conducted to study the reach characteristics of the considered cases and the data was qualitatively compared with the predicted results. The model was able to appreciably capture the variation in reachability due to different strategies. After this, a parametric analysis on the dependence and sensitivity of maximum reach to limits on stability, postural effort and hand-held load is presented. Through this analysis, it is shown that maximum reach is a function of both stability and effort limits, while the influence of effort was particularly strong for low height targets. In this work, we highlight the challenges in modelling functional reach for standing posture as well as present useful insights on the characteristics of standing reach

Item Type:	Journal Article
Publication:	Theoretical Issues in Ergonomics Science
Publisher:	Taylor and Francis Ltd.
Additional Information:	The copyright for this article belongs to the Taylor and Francis Ltd.
Keywords:	Digital Human Model; Functional reach; reach envelope; reach simulation; standing reach
Department/Centre:	Division of Mechanical Sciences > Centre for Product Design & Manufacturing
Date Deposited:	01 Feb 2023 09:50
Last Modified:	01 Feb 2023 09:50
URI:	https://eprints.iisc.ac.in/id/eprint/79690

Actions (login required)

View Item