Abstract
The estimation of the centre of mass position in humans is usually based on biomechanical models developed from anthropometric tables. This method can potentially introduce errors in studies involving elderly people, since the ageing process is typically associated with a modification of the distribution of the body mass. In this paper, an alternative technique is proposed, and evaluated with an experimental study on 9 elderly volunteers. The technique is based on a virtual chain, identified from experimental data and locating the subject's centre of mass. Its configuration defines the location of the centre of mass, and is a function of the anatomical joint angles measured on the subject. This method is a valuable investigation tool in the field of geronto-technology, since it overcomes some of the problems encountered with other CoM estimation methods.
Highlights
The ability to maintain balance in upright standing is a basic requirement during daily activities
The horizontal component of the centre of mass can be read from force plates
As described in previous publications [5, 6], the Centre of Mass (CoM) estimation technique based on a SESC was validated on a HOAP3 humanoid robot
Summary
The ability to maintain balance in upright standing is a basic requirement during daily activities It is a pre-requisite for independent living, but can be challenging for elderly people due to inevitable transformations associated with ageing: increase in reaction times, deterioration of visual and sensory feedback, and modifications of the biomechanical properties of the muscles [9, 14, 23,24,25]. Understanding the mechanisms underlying human balance, and their modifications due to the ageing process, is of fundamental importance in research aimed at improving the quality of life by increasing independence in later life Such information could guide the development of assistive devices, fall prevention tests and rehabilitation procedures
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