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Development of a Powered Knee Prosthesis using a DC Motor

DC 모터를 이용한 동력 의족 시스템 개발

  • Kim, Won-Sik (Department of Electrical Engineering, Inha University) ;
  • Kim, Seuk-Yun (Robot Engineering Major, Inha University) ;
  • Lee, Young-Sam (Department of Electrical Engineering, Inha University)
  • Received : 2013.10.29
  • Accepted : 2013.12.26
  • Published : 2014.02.01

Abstract

In this paper, we present an overview of the structure of a lab-built powered knee prosthesis and the control of it. We build a powered prosthesis prototype on the basis of previous researches and aim at obtaining the essential technology related with its control. We adopt the slider-crank mechanism with a DC motor as an actuator to manipulate the knee joint. We also build an embedded control system for the prosthesis with a 32-bit DSP controller as a main computation unit. We divide the gait phase into five stages and use a FSM (Finite State Machine) to generate a torque reference needed for each stage. We also propose to use a position-based impedance controller for driving the powered knee prosthesis stably. We perform some walking experiments at fixed speeds on a tread mill in order to show the feature of the built powered prosthesis. The experimental results show that our prosthesis has the ability to provide a functional gait that is representative of normal gait biomechanics.

Keywords

References

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Cited by

  1. The Structure of a Powered Knee Prosthesis based on a BLDC Motor and Impedance Control using Torque Estimation on Free Swing vol.21, pp.5, 2015, https://doi.org/10.5302/J.ICROS.2015.15.9018