Showing papers on "Crossover published in 1969"

Theory of Manual Vehicular Control

Abstract: The analytical basis of manual vehicular control theory is a combination of feedback systems analysis and mathematical models for human operators engaged in control tasks. Simplified representations for the operator-system combination are provided by the 'crossover model', which is described in detail. The system dynamics and average performance of the crossover model system are developed. With these as bases, case studies are presented to illustrate the types of result which can be obtained from application of the operator-vehicle control theory. Two aircraft control examples illustrate the use of the theory and its empirical correlates to estimate operator dynamic characteristics, system performance, pilot ratings, pilot commentary, design implications, and some experimental guidelines. A driver automobile example is presented to illustrate the use of the theory in structuring the key guidance and control features of the driver's visual field. A comprehensive bibliography of operator-vehicle system analysis applications is also provided.

A Method for the Direct Measurement of Crossover Model Parameters

Abstract: A parameter tracking system that directly measures the gain and time-delay parameters of the crossover model of a compensatory control system is discussed. The parameters of the crossover model, as determined by the tracking system, are shown to vary between subjects, with input bandwidth, and with subject practice. The accuracy of-the parameter tracking system is substantiated by cross checking experimental data by spectral analysis.