Accession Number : AD0647749

Title :   THE HUMAN OPERATOR AS AN ELEMENT IN A CONTROL SYSTEM WITH TIME VARYING DYNAMICS,

Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OHIO CONTROL CRITERIA BRANCH

Personal Author(s) : Hess,Ronald A.

Report Date : JUN 1965

Pagination or Media Count : 78

Abstract : In modern control system analysis, situations arise in which nonlinearities and/or time variations make linear constant-coefficient representations inadequate. It follows that the ability of the human operator to control a system whose dynamics can be represented by linear differential equations with time-varying coefficients is now of more than just academic interest. To shed more light upon this subject, an experimental study was undertaken in which the human operator is presented with the task of controlling a system with linear, time-varying dynamics. More explicitly, the human is an element in a single axis, compensatory tracking system. Zero order periodically varying controlled elements are utilized as well as pure integrator elements in series with periodically varying gains. System inputs range from single sine waves to 'random appearing' signals consisting of the sum of four sine waves. The possibility of representing the time varying system with an 'equivalent' time invariant system is discussed and performance data is presented. (Author)

Descriptors :   (*OPERATORS(PERSONNEL), *CONTROL SYSTEMS), (*MAN MACHINE SYSTEMS, CONTROL SYSTEMS), DYNAMICS, DIFFERENTIAL EQUATIONS, PERFORMANCE(HUMAN), TRACKING, HUMAN FACTORS ENGINEERING

Subject Categories : Human Factors Engineering & Man Machine System

Distribution Statement : APPROVED FOR PUBLIC RELEASE