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Rapid Communication

A Generalized Strategy for Measuring Performance in the Velocity-Position Phase Plane

Pages 269-273 | Received 01 Mar 2012, Accepted 06 May 2012, Published online: 02 Aug 2012
 

ABSTRACT

Recent work has proposed the reformulation of smoothness measures derived from standard integrated squared jerk, as a function of position, not time. However, its promulgation was in the context of monotonic excursion data extracted from single degree-of-freedom (DOF) movements; the result was a formulation of a phase smoothness measure with limited generalizability. Here, we present a complete methodology for implementing the phase smoothness measure in arbitrary datasets, i.e. for multi-DOF movements with no assumptions of monotonicity in the kinematic profile. Additional suggestions are made for best practices.

ACKNOWLEDGMENTS

The author gratefully acknowledges William Craelius and Nam-Hun Kim for their helpful discussions in the preparation of this article.

This article not subject to U.S. copyright law.

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