TY - JOUR
T1 - An Adaptive Hybrid Control Architecture for an Active Transfemoral Prosthesis
AU - Mazumder, Aniket
AU - Hekman, Edsko E.G.
AU - Carloni, Raffaella
N1 - Funding Information:
This work was supported by the European Commission's Horizon 2020 Program as part of the Project MyLeg under Grant 780871.
Publisher Copyright:
© 2013 IEEE.
PY - 2022/5/9
Y1 - 2022/5/9
N2 - The daily usage of a prosthesis for people with an amputation consists of phases of intermittent and continuous walking patterns. Based on this observation, this paper introduces a novel hybrid architecture to control a transfemoral prosthesis, where separate algorithms are used depending on these two different types of movement. For intermittent walking, an interpolation-based algorithm generates control signals for the ankle and knee joints, whereas, for continuous walking, the control signals are generated utilizing an adaptive frequency oscillator. A switching strategy that allows for smooth transitioning from one controller to another is also presented in the design of the architecture. The individual algorithms for the generation of the joints angles' references, along with the switching strategy were experimentally validated on a pilot test with a healthy subject wearing an able-bodied adapter and a designed transfemoral prosthesis. The results demonstrate the capability of the individual algorithms to generate the required control signals while undergoing smooth transitions when required. Through the use of a combination of interpolation and adaptive frequency oscillator-based methods, the controller also demonstrates its response adaptation capability to various walking speeds.
AB - The daily usage of a prosthesis for people with an amputation consists of phases of intermittent and continuous walking patterns. Based on this observation, this paper introduces a novel hybrid architecture to control a transfemoral prosthesis, where separate algorithms are used depending on these two different types of movement. For intermittent walking, an interpolation-based algorithm generates control signals for the ankle and knee joints, whereas, for continuous walking, the control signals are generated utilizing an adaptive frequency oscillator. A switching strategy that allows for smooth transitioning from one controller to another is also presented in the design of the architecture. The individual algorithms for the generation of the joints angles' references, along with the switching strategy were experimentally validated on a pilot test with a healthy subject wearing an able-bodied adapter and a designed transfemoral prosthesis. The results demonstrate the capability of the individual algorithms to generate the required control signals while undergoing smooth transitions when required. Through the use of a combination of interpolation and adaptive frequency oscillator-based methods, the controller also demonstrates its response adaptation capability to various walking speeds.
KW - control design
KW - Prosthetics
KW - rehabilitation robotics
UR - http://www.scopus.com/inward/record.url?scp=85131275480&partnerID=8YFLogxK
U2 - 10.1109/ACCESS.2022.3173348
DO - 10.1109/ACCESS.2022.3173348
M3 - Article
AN - SCOPUS:85131275480
SN - 2169-3536
VL - 10
SP - 52008
EP - 52019
JO - IEEE Access
JF - IEEE Access
ER -