International Society of Biomechanics
Gold sponsor

Peter Vint

Benchmark data from Pezzack et al. (1977).

Pezzack's filter and differentiation benchmark data 

The data file: 

 

 

Description

An ASCII text file that contains Pezzack's original displacement data, Lanshammar's noisy version of Pezzack's displacement data and the digitized replica of Pezzack's analog acceleration data. Please see the original publications in Journal of Biomechanics for more detailed information. Data are in the following format: 

col 1 - Time (delta t = 0.0201 s)
col 2 - Pezzack's original displacement data (radians, Pezzack et al., 1977)
col 3 - Lanshammar's modification of Pezzack's original displacement data (radians, Lanshammar, 1982)
col 4 - Digitized acceleration data (radians/s^2, Vint & Hinrichs, 1996,
courtesy of G. Wood) 

References

 

  • Lanshammar, H. (1982). On practical evaluation of differentiation techniques for human gait analysis. Journal of Biomechanics, 5, 99-105. 
  • Pezzack, J.C., Norman, R.W., & Winter, D.A. (1977). An assessment of derivative determining techniques used for motion analysis. Journal of Biomechanics, 10, 377-382. 
  • Vint , P.F. & Hinrichs, R.N. (1996). Endpoint error in smoothing and differentiating raw kinematic data: An evaluation of four popular methods. Journal of Biomechanics, 29, 1637-1642. 

 

Contributed by

Peter F. Vint, Ph.D.
Department of Exercise and Sport Science
PO Box 26169
University of North Carolina at Greensboro
Greensboro, NC 27402-6169
Phone: (336) 334-3274
Fax: (336) 334-3238
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
URL: http://www.uncg.edu/~pfvint