Experimental Errors in the Observation of Body Joint Kinematics


Walter, S.D.; Panjabi, M.M.   (1988, ASQC and the American Statistical Association)   McMaster University Medical Centre, Canada; Yale School of Medicine, New Haven, CT

Technometrics    Vol. 30    No. 1
QICID: 9338    February 1988    pp. 71-78
List $10.00
Member $5.00

This article is not available online. Contact us to receive a scan of the archive, in PDF format.

Article Abstract

Any planar displacement of a rigid body can be uniquely characterized as a rotation about some fixed axis through a certain angle. These same rotational parameters can also describe the relative motion of two joint components and have been used to describe the rotational behavior of human body joints. This article derives estimates of these parameters and their standard errors, based on geometric arguments for the coordinates of markers observed during the rotation. This in turn identifies optimal placements of the experimental markers, which maximize the precision of the estimated center of rotation and the angle of rotation. This is the first statistical treatment of this problem. Previous approaches used deterministic error structures.


Chemical and process industries,Estimation

Browse QIC Articles Chronologically:     Previous Article     Next Article

New Search

Featured advertisers

ASQ is a global community of people passionate about quality, who use the tools, their ideas and expertise to make our world work better. ASQ: The Global Voice of Quality.