Citation

Gruver WA, Ayoub MA, Muth MB. J. Saf. Res. 1979; 11(2): 61-71.

Copyright

(Copyright © 1979, U.S. National Safety Council, Publisher Elsevier Publishing)

DOI

unavailable

PMID

unavailable

Abstract

And optimization models suitable for the analysis and assessment of sagittal manual lifting tasks is derived. The task is described as a function space minimalization problem with a nonlinear objective and subject to linear and nonlinear constraints. The objective functional is represented in terms of the torques acting on the ankle joint during performance. Model constraints are the limitations imposed by the characteristics of the human body, the task, and the workplace. Using a special discretization procedure, the original minimalization problem is converted into a finite dimensional nonlinear programming problem amenable to solution by a modified gradient projection algorithm. Examples using the model to analyze typical lifts are presented and discussed.