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Development of a four-channel haptic system for remote assessment of patients with impaired hands

Published online by Cambridge University Press:  13 September 2016

Omar Daud*
Affiliation:
Center for the Development of Nanoscience and Nanotechnology, CEDENNA, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins 3363, Santiago, Chile
Roberto Oboe
Affiliation:
Department of Management and Engineering, University of Padova, Stradella San Nicola, 3, 36100, Vicenza, Italy
Fabio Oscari
Affiliation:
Department of Management and Engineering, University of Padova, Stradella San Nicola, 3, 36100, Vicenza, Italy
Stefano Masiero
Affiliation:
Department of Neurology, Padova Hospital, Padova, Italy
Giulio Rosati
Affiliation:
Department of Management and Engineering, University of Padova, Stradella San Nicola, 3, 36100, Vicenza, Italy
*
*Corresponding author. E-mail: omar.daud@usach.cl

Summary

Haptic devices have proven effective in stimulating proprioceptive sensing in post-stroke patients. In this work, pre-existing devices were used together in a remote environment for the teleassessment of impaired hands. A four-channel bilateral control system in the presence of large and variable time delay is proposed as a proof of concept. Time delay is managed with a novel communication disturbance observer (CDOB). The system also employed a scaling down compensation value (SDCV) for the CDOB. The proposed control system was tested successfully in bilateral haptic interaction, simulating a remote motor and functional evaluation of patients' hands, guaranteeing safe and stable interaction, even in the presence of large network delays.

Type
Articles
Copyright
Copyright © Cambridge University Press 2016 

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