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http://dx.doi.org/10.5762/KAIS.2014.15.4.1813

Stability Analysis of a Haptic System with a Human Impedance model using the Routh-Hurwitz Criterion  

Lee, Kyungno (Department of Energy System Engineering, Korea National University of Transportation)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.15, no.4, 2014 , pp. 1813-1818 More about this Journal
Abstract
This paper presents the stability analysis of the haptic system including a human impedance using the Routh-Hurwitz criterion. The reflective force is computed from a virtual spring model and is transferred to a human operator using the first-order-hold method. The stability boundary conditions are induced and the relation among a virtual spring ($K_w$), the mass ($M_h$), the damping ($B_h$) and the stiffness ($K_h$) of a human impedance is analyzed. Hence the stability boundary of the virtual spring ($K_w$) is proposed as $K_w{\leq}54413{\sqrt{(M_h+M_d)(B_h+B_d)}}-0.486K_h$ when the sampling time is 1 ms. The average relative error is about 0.5% when the mathematical analysis results are compared with the results of the stability boundary model.
Keywords
First-Order-Hold; Haptic System; Human Impedance; Stability Analysis; Virtual Wall;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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