THE DYNAMIC OPTIMIZATION OF STS MOVEMENT

Hiroshi Yamasaki, Hiroyuki Kambara, Yasuharu Koike

Abstract

The purpose of this study was to clarify the criterion which can predict trajectories during sit-to-stand (STS) movement. Three types of rising movements from the chair, i.e., upright, natural, and leaning-forward rising, were measured for five subjects. The trajectories of the center of mass (COM) predicted by the minimum torque-change model, rather than the minimum jerk model, resemble the measured movements in all rising patterns. The upright rising required greater extension torque of the knee and ankle joints at seat-off. The leaning-forward rising required greater extension hip torque than the natural and upright rising conditions. Natural rising movement might be a result of dynamic optimization.

Keywords

dynamic optimization, Rising, Trajectory

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IMEKO-WC-2009-TC18-198.pdf

DOI

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IMEKO TC

TC18 - Measurement of Human Functions

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