Hybrid Half-Gaussian Selectively Adaptive Fuzzy Control of an Actuated Ankle-Foot Orthosis
Huiseok Moon, Roshni Maiti, Kaushik Das Sharma, Yacine Amirat, Patrick Siarry, Samer Mohammed
Abstract
To control an actuated ankle–foot orthosis (AAFO) during walking, a selectively adaptive hybrid fuzzy control employing particle-swarm optimization was used in conjunction with a Lyapunov-theory-based adaptive fuzzy-logic control. Adaptation (a computationally expensive process) was performed only when the tracking error exceeded a certain half-Gaussian function. The stability of the overall closed-loop system was proved using Lyapunov theory. The proposed control strategy was verified both by simulations and by experiments with five healthy subjects. The proposed control strategy significantly reduced both tracking error and required control torque when compared to other competing control schemes.
BibTeX
@inproceedings{ral2022_hybridhalfgaussi,
title = {Hybrid Half-Gaussian Selectively Adaptive Fuzzy Control of an Actuated Ankle-Foot Orthosis},
author = {Huiseok Moon and Roshni Maiti and Kaushik Das Sharma and Yacine Amirat and Patrick Siarry and Samer Mohammed},
booktitle = {RA-L 2022},
year = {2022}
}