Effects of Movement Speed and Magnetic Disturbance on the Accuracy of Inertial Measurement Units

Details

• Personal Author:
  Chen H ; Fethke N ; Schall MC Jr.
• Description:
  This study evaluated the effects of motion speed and magnetic disturbance on the spatial orientation accuracy of an inertial measurement unit (IMU) on the hand. Thirteen participants performed six trials of a repetitive material transfer task. Movement speed (15, 30, 45 transfers/minute) and magnetic disturbance (absent, present) were the independent variables. Optical motion capture was the reference. Root-mean-square differences (RMSD) exceeded 20 degrees when inclination measurements (pitch and roll) were calculated using the IMU accelerometer. A linear Kalman filter and a proprietary, embedded Kalman filter reduced inclination RMSD to <3 degrees across all movement speeds. The RMSD in the heading direction (i.e., about gravity) increased (from <5 degrees to 17 degrees) under magnetic disturbance. The linear Kalman filter and the embedded Kalman filter reduced heading RMSD to <12 degrees and <7 degrees, respectively. Use of IMUs and Kalman filters can improve inclinometer measurement accuracy. However, magnetic disturbances continue to limit the accuracy of three-dimensional IMU motion capture. [Description provided by NIOSH]
• Subjects:
  Air Movements Coal Coal Mining Mining Occupational Health Safety Ventilation
• Keywords:
  Biomechanical Modeling Biomechanics Ergonomics Kinetics Motion Studies Sensors
• ISSN:
  1071-1813
• Publisher:
  Human Factors and Ergonomics Society
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Proceedings
• Place as Subject:
  Alabama ; Iowa ; OSHA Region 4 ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  61
• Issue:
  1
• NIOSHTIC Number:
  nn:20066625
• Citation:
  Proceedings of the Human Factors and Ergonomics Society 61st Annual Meeting, October 9-13, 2017, Austin, Texas. Santa Monica, CA: Human Factors and Ergonomics Society, 2017 Sep; 61(1):1046-1050
• Federal Fiscal Year:
  2017
• Performing Organization:
  University of Iowa
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Proceedings of the Human Factors and Ergonomics Society 61st Annual Meeting, October 9-13, 2017, Austin, Texas
• End Date:
  20290630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:08bd63006aac5e576676ab34217cc69e0ac2f3be80c096d7171cbdcde5c5637d855b6d3eddf56a830f499fe9507f6ab486d80fc24bb212c7c0e5deb3c338ad84
• Download URL:
  https://stacks.cdc.gov/view/cdc/231139/cdc_231139_DS1.pdf
• File Type:
  [PDF - 2.22 MB ]