Abstract
A human stands on a one degrees-of-freedom mechanical vibration stage is considered. The human body and the mechanical vibration stage is modeled as a linear two-degrees-of-freedom vibration system. The experimental frequency response verifies the assumption of the two degrees-of-freedom system. The mass, the viscocity, and the stifness parameters are identified by the freqeucny domain least squares method. In the experiment, some postural, visual, or psychological load conditions are examined for some human subjects. The relation between the experimental conditions and the identified parameters are discussed.
