Perturbation-based measurement of real and imaginary parts of human arm's mechanical impedance

Mechanical impedance is a complex number and a system's property. Impedance of human arm is the control variable when the central nervous system coordinates a motion. This research proposes a new method for measuring the mechanical impedance as a complex number. Impedance is measured at the han...

Full description

Saved in:
Bibliographic Details
Published in:2010 Annual International Conference of the IEEE Engineering in Medicine and Biology 2010-01, p.5911-5914
Main Authors: Hondori, H M, Ling Shih-Fu
Format: Article
Language:English
Subjects:
Equations
Humans
Impedance
Impedance measurement
Mathematical model
Mechanical variables measurement
Muscles
Citations: Items that cite this one
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Mechanical impedance is a complex number and a system's property. Impedance of human arm is the control variable when the central nervous system coordinates a motion. This research proposes a new method for measuring the mechanical impedance as a complex number. Impedance is measured at the hand point while sinusoidal perturbation is applied. That helps extracting the real and imaginary part of the impedance. Simulations reveal how spring, mass, and damper contribute to the mechanical impedance. Despite the simulation results, our experiment shows that damping which is the real part of impedance is not frequency independent and imaginary part of mechanical impedance decreased with increasing frequency that in turn suggests the stiffness is increasing.
ISSN:1094-687X
1558-4615
DOI:10.1109/IEMBS.2010.5627544