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Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
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Development of Tiny Vane-Type Magnetorheological Brake Considering Quality Function Deployment.

Agus Lutanto1, U Ubaidillah1, Fitrian Imaduddin1,2

  • 1Department of Mechanical Engineering, Faculty of Engineering, Universitas Sebelas Maret, Surakarta 57126, Indonesia.

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|January 21, 2023
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Summary

Researchers developed a tiny vane-type magnetorheological brake (MRB) using quality function deployment (QFD). This novel MRB design for ankle foot orthosis (AFO) demonstrates significant torque variations based on fluid gap and current, optimizing performance.

Keywords:
ankle foot orthosismagnetorheological fluidquality function deploymenttiny magnetorheological brakevane magnetorheological brake

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Area of Science:

  • * Engineering and Applied Physics
  • * Biomedical Engineering and Instrumentation

Background:

  • * Magnetorheological brakes (MRBs) are crucial for ankle foot orthosis (AFO) devices, with torque-to-dimension ratio being a key design parameter.
  • * Vane-type MRBs are suitable for AFOs due to their limited motion, but quality function deployment (QFD) is underutilized in their design.
  • * This study addresses the gap by applying QFD to design a novel tiny vane-type MR brake (TVMRB).

Purpose of the Study:

  • * To design and develop a tiny vane-type MR brake (TVMRB) for AFO applications using the quality function deployment (QFD) methodology.
  • * To analyze the torque characteristics of the TVMRB under varying fluid gap and current conditions.
  • * To evaluate other performance metrics such as operational range and power consumption, and compare the design with existing solutions via the House of Quality (HOQ).

Main Methods:

  • * Theoretical analysis and 3D magnetic flux density simulation using Ansys Maxwell.
  • * Experimental validation of torque characteristics with variations in fluid gap (0.5 mm, 0.75 mm, 1 mm) and input current (0.5-2 A).
  • * Application of the Quality Function Deployment (QFD) method throughout the design process.

Main Results:

  • * The TVMRB successfully generated torque ranging from 6.14 Nm (1 mm gap, 0.5 A) to 46.71 Nm (0.5 mm gap, 2 A) at 10 rpm, excluding MR fluid leakage.
  • * Torque output is significantly influenced by both fluid gap size and applied current.
  • * Detailed performance data on operational range and power consumption are provided, alongside a comparative analysis using the House of Quality (HOQ).

Conclusions:

  • * The QFD methodology enabled the successful development of a functional TVMRB suitable for AFOs.
  • * The study provides a comprehensive understanding of the torque performance influenced by key design parameters.
  • * The developed TVMRB offers a promising solution for orthotic devices, with potential for further optimization based on the HOQ comparison.