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A Structured Rehabilitation Protocol for Improved Multifunctional Prosthetic Control: A Case Study
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Wheelchair prototype controlled by position, speed and orientation using head movement.

Aura Ximena González-Cely1, Mauro Callejas-Cuervo2, Teodiano Bastos-Filho1

  • 1Postgraduate Program in Electrical Engineering, Federal University of Esṕırito Santo, Av. Fernando Ferrari, 514, Vitoria 29075-910, Brazil.

Hardwarex
|May 5, 2022
PubMed
Summary
This summary is machine-generated.

This study developed a head-controlled wheelchair prototype using commercial electronics and software. The system demonstrated good usability, though variable speed control was slower due to head motion errors.

Keywords:
Fuzzy logic controlHead motionInertial Measurement Unit (IMU)Wheelchair prototypeWireless

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Area of Science:

  • Biomedical Engineering
  • Human-Computer Interaction
  • Rehabilitation Technology

Background:

  • Wheelchair operation can be challenging for individuals with limited mobility.
  • Head movement control offers a potential alternative for wheelchair navigation.
  • Evaluating system response and usability is crucial for assistive technology development.

Purpose of the Study:

  • To design and implement a wheelchair prototype controllable by head movements.
  • To analyze the system's response time under different control conditions.
  • To assess the usability of the head-controlled wheelchair system.

Main Methods:

  • A wheelchair prototype was constructed using off-the-shelf electronic components.
  • Control systems were simulated utilizing MATLAB® toolbox and Python™ libraries.
  • System response was measured for manual, constant-speed, and variable-speed head control.
  • Usability was evaluated by 10 participants using the System Usability Scale (SUS).

Main Results:

  • The mean manual control response time was 37.8 seconds.
  • Mean orientation control response times were 36.5 s (constant speed) and 44.2 s (variable speed).
  • Variable speed control was slower, attributed to head motion errors, and the system achieved a "very good" SUS rating.

Conclusions:

  • The head-controlled wheelchair prototype is feasible and demonstrates good usability.
  • Head motion accuracy impacts system performance, particularly at variable speeds.
  • Further refinement of head tracking and control algorithms could enhance performance.