Mechanical design of a knee prosthesis for transfemoral amputation

Gustavo Fernando Vintimilla Leon, Santiago Ferrandiz Bou, Christian Mauricio Cobos Maldonado, Fernando Vladimir Pintado Albarracin

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In the present investigation, the design and simulation of a polycentric knee mechanism with four-bar of voluntary control is performed, posing its mathematical model using the vector loop equation, so that its instantaneous center of rotation (CIR) meets the stability criteria established by Hosmer-Dorrance. The design of a four-bar system and the clamping for a hydraulic actuator were performed, followed by the simulation using finite elements in SolidWorks. The results obtained indicate that the maximum Von Mises tension in the four-bar mechanism is 5.161x107N/m2 and 3.834x107N/m2 in the actuator clamp, with a safety factor of the entire system greater than 1, guaranteeing to support a maximum weight of 102Kg. A prototype was built by additive and subtractive manufacturing, verifying the correct operation of the system, complying with angular displacements.

Original languageEnglish
Title of host publication2020 IEEE ANDESCON, ANDESCON 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728193656
DOIs
StatePublished - 13 Oct 2020
Event2020 IEEE ANDESCON, ANDESCON 2020 - Quito, Ecuador
Duration: 13 Oct 202016 Oct 2020

Publication series

Name2020 IEEE ANDESCON, ANDESCON 2020

Conference

Conference2020 IEEE ANDESCON, ANDESCON 2020
Country/TerritoryEcuador
CityQuito
Period13/10/2016/10/20

Bibliographical note

Publisher Copyright:
© 2020 IEEE.

Keywords

  • Knee
  • Polycentric mechanism
  • Prototype
  • Simulation
  • Stability
  • Transfemoral
  • Voluntary control

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