RT Journal Article
T1 Optimization of Semiautomated Calibration Algorithm of Multichannel Electrotactile Feedback for Myoelectric Hand Prosthesis
A1 Isaković, Milica
A1 Malešević, Jovana
A1 Keller, Thierry
A1 Kostić, Miloš
A1 Štrbac, Matija
A1 Isakovic, Milica
AB The main drawback of the commercially available myoelectric hand prostheses is the absence of somatosensory feedback. We recently developed a feedback interface for multiple degrees of freedom myoelectric prosthesis that allows proprioceptive and sensory information (i.e., grasping force) to be transmitted to the wearer instantaneously. High information bandwidth is achieved through intelligent control of spatiotemporal distribution of electrical pulses over a custom-designed electrode array. As electrotactile sensations are location-dependent and the developed interface requires that electrical stimuli are perceived to be of the same intensity on all locations, a calibration procedure is of high importance. The aim of this study was to gain more insight into the calibration procedure and optimize this process by leveraging a priori knowledge. For this purpose, we conducted a study with 9 able-bodied subjects performing 10 sessions of the array electrode calibration. Based on the collected data, we optimized and simplified the calibration procedure by adapting the initial (baseline) amplitude values in the calibration algorithm. The results suggest there is an individual pattern of stimulation amplitudes across 16 electrode pads for each subject, which is not affected by the initial amplitudes. Moreover, the number of user actions performed and the time needed for the calibration procedure are significantly reduced by the proposed methodology.
SN 1176-2322
YR 2019
FD 2019
LA eng
NO Isaković , M , Malešević , J , Keller , T , Kostić , M , Štrbac , M & Isakovic , M 2019 , ' Optimization of Semiautomated Calibration Algorithm of Multichannel Electrotactile Feedback for Myoelectric Hand Prosthesis ' , Applied Bionics and Biomechanics , vol. 2019 , 9298758 , pp. 1-9 . https://doi.org/10.1155/2019/9298758
NO Publisher Copyright: © 2019 Milica Isaković et al.
DS TECNALIA Publications
RD 6 jul 2024