Sampled — Data Model

Abstract

The control system which enables us to move our eyes and follow a moving target has been investigated from the servomechanism point of view. The ability to identify measurable quantities as input, output, and error variables justifies such an approach; the input is the angular position of an object of interest (the target) with respect to some reference fixed to the head; the output is the angle of the line of gaze with respect to this same reference; and the error, defined as input minus output, is therefore the angular difference between the direction of the target and the direction in which the subject is actually looking. Using these measurable quantities as a basis, the analysis methods of control theory have been applied to the eye movement system to yield transfer functions for the system which should be of value to the human engineer, physiologist, and control engineer [79–81].