Towards optimal toe-clearance in synthesizing polycentric prosthetic knee mechanism

Marisami, P; Venkatachalam, R.

doi:10.1080/10255842.2021.1972291

Cited by 6 publications

(1 citation statement)

References 22 publications

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“…Marisami P. and Venkatachalam R. synthesized a polycentric knee mechanism to improve the toeclearance at mid-swing with optimizing dimensions of the mechanism by Evolutionary Algorithm. They used both the fixed and moving trajectories of the four-bar mechanism as parameters; they also wrote that, by creating a radar diagram over some parameters with commercial knee prostheses, the mechanism they obtained scored, in overall higher than the most available mechanisms (Marisami and Venkatachalam, 2022). Poliakov et al, obtained an appropriate Pareto solution set by means of the PSI Algorithm for the dimensions of four-bar knee mechanism.…”

Section: Introductionmentioning

confidence: 99%

Dört Çubuk Mekanizmalı Diz Protezlerinin Arı Algoritması ve Genetik Algoritma ile Boyut Optimizasyonu

AYĞAHOĞLU,

GÜMÜŞ,

ÇAKAN

et al. 2023

Journal of Materials and Mechatronics: A

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In knee prostheses, the curve of the instantaneous center of rotation (ICR) and, therefore, stability of the prothesis are the most important parameters to be considered. The ICR curve depends on many parameters. One of them and the most effective one is the dimensions of four bar mechanism. In polycentric knee mechanisms, it has become inevitable to use optimization techniques while determining the dimensions of the mechanism for the stability of the prosthesis in the stance position. In this study, definitions of knee prostheses and polycentric knee mechanisms are given, optimization studies written in this field are mentioned thorough literature research. The study aims to find mechanism dimensions that gives ICR curve close to the reference curve by optimizing the mechanism dimensions of four-bar knee mechanisms. The Bees Algorithm and Genetic Algorithm (GA) were used for this purpose. The limits and objective function for the optimization were determined, and after many trials, separate mechanism dimensions with The Bees Algorithm and the Genetic Algorithm are obtained. By comparing the results, it was seen that The Bees Algorithm gave better results.

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Section: Introductionmentioning

confidence: 99%