Accession Number:

ADP004329

Title:

The Effects of Time Delay in Man-Machine Control Systems: Implications for Design of Flight Simulator Visual-Display-Delay Compensation,

Descriptive Note:

Corporate Author:

NATIONAL AERONUATICS AND SPACE ADMINISTRATION MOFFETT FIELD CA AMES RESEARCH CENTER

Personal Author(s):

Report Date:

1984-09-01

Pagination or Media Count:

13.0

Abstract:

When human operators are performing precision tracking tasks, their dynamic response can often be modeled by quasi-linear describing functions. That fact permits analysis of the effects of delay in certain man-machine control systems using linear control system analysis techniques. The analysis indicates that a reduction in system stability is the immediate effect of additional control system delay, and that system characteristics moderate or exaggerate the importance of the delay. A selection of data simulator and flight test consistent with the analysis is reviewed. Flight simulator visual-display-delay compensation, designed to restore pilot-aircraft system stability, was evaluated in several studies which are reviewed here. The studies range from single-axis, tracking-task experiments with sufficient subjects and trials to establish the statistical significance of the results to a brief evaluation of compensation of a computer-generated-imagery CGI visual display system in a full six-degree-of-freedom simulation. The compensation was effective -- improvements in pilot performance and workload or aircraft handling-qualities rating HQR were observed. Results from recent aircraft handling-qualities research literature, which support the compensation design approach, are also reviewed. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE