A report presents a study of the use of wavelet-based mathematical models to quantify the responses of humans in control loops. The report begins with a review of the traditional representation of manual control responses by use of transfer functions derived from Fourier transforms, which, the report notes, are not adequate to represent the temporally varying human responses observed in practice. Some basic principles and equations of wavelet transforms are presented.

This work was done by Martin Brenner of Dryden Flight Research Center and Peter M. Thompson and David H. Klyde of Systems Technology, Inc.