Numerical Differentiation of Tracking Data of Human Motion: The Virtual Accelerometer

[+] Author and Article Information
S. B. Bortolami

Harvard Medical School, Massachusetts General Hospital Biomotion Laboratory, Boston, MA

P. O. Riley

Massachusetts General Hospital Biomotion Laboratory, Boston, MA

D. E. Krebs

Massachusetts General Hospital Biomotion Laboratory; MGH Institute of Health and Professions; Massachusetts Institute of Technology; Harvard Medical School; Boston, MA

J. Dyn. Sys., Meas., Control 119(2), 355-358 (Jun 01, 1997) (4 pages) doi:10.1115/1.2801265 History: Received May 01, 1995; Online December 03, 2007


A method based on the Kalman Filter for deriving whole-body segment accelerations from position tracking data is described. Such a procedure is experimentally calibrated and qualified as a Virtual Accelerometer supplying a resolution of 0.2 m/s2 and a relative accuracy of better than 10 percent rms within 0–8 Hz bandwidth. Results are finally compared to accelerometer performances reported by previous investigators.

Copyright © 1997 by The American Society of Mechanical Engineers
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