R.H. Mitchell, A.I.T. Salo, and A.J. Medland (UK)
: Experiments and modelling, sit-to-stand,constraint modelling, balance.
Of the numerous man-model packages available for
ergonomic evaluation, few have the capacity to correctly
recreate human movement patterns under differing
conditions without intervention from skilled operators. A
manikin has been created within SWORDS, a constraint
based modeller that produces unique movement patterns
based on the conditions under which a movement occurs.
For application to the manikin, this study established
variations that occur in the mass centre horizontal
trajectory due to changes in pace, posture and seat height,
during sit-to-stand. Variations were considered in terms of
events that occur throughout the motion. Regression
equations were used in order to predict the occurrence of
events under different conditions, and a mass centre
trajectory was created by fitting a curve to the events.