Title: A new approach based on controlling the joint movement of drop foot patients

Authors: Mina Lagzian; Seyed Ehsan Razavi; Hamid Reza Kobravi

Addresses: Department of Electrical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran ' Department of Electrical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran ' Department of Biomedical Engineering, Mashhad Branch, Islamic Azad University, Mashhad, Iran

Abstract: Stepping is one of the significant functions, which needs an appropriate coordination between various joints to be accomplished properly. Drop foot is a gait abnormality that the harmony between joints is disturbed. This paper proposes a new fuzzy control model for controlling joint movement of drop foot patients. This method has two advantages over pervious ones. The first one is based on identifying a kinematic pattern and not just statistical works. The second is independent of any mathematical models and formulas. The controlling method is based on identification of both stable and unstable manifolds of basin attraction of a healthy person in order to and how to properly move his/her defective leg. The results indicate that using the proposed fuzzy controlling approach has lower computations and good convergence.

Keywords: stepping procedure; drop foot; gate analysis; stable and unstable manifolds; absorption platform; saddle points; fuzzy control.

DOI: 10.1504/IJMEI.2022.121129

International Journal of Medical Engineering and Informatics, 2022 Vol.14 No.2, pp.115 - 124

Received: 06 Mar 2020
Accepted: 13 Jun 2020
Published online: 28 Feb 2022 *

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