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experimental evaluation of a perspective tunnel display for three-dimensional helicopter approachesA computer-generated perspective tunnel display for a steep and strongly curved three-dimensional helicopter approach is studied. The necessary control variables for following a curved trajectory are analyzed, the effectiveness of superimposed predictor symbology is investigated, and a suitable predictor law is formulated. The theoretical considerations are validated by an extensive fixed-base simulator program. The tunnel display with a superimposed predictor symbol is shown to outperform conventional-type displays in its abilities to follow a curved trajectory in the presence of gust disturbances, to enter the trajectory from an unknown position outside this trajectory, as well as to monitor automatic approaches. The feasibility of the tunnel display for operation in actual flight has been demonstrated in an exploratory flight test.
Document ID
Document Type
Reprint (Version printed in journal)
Grunwald, A. J.
(Technion - Israel Institute of Technology Haifa, Israel)
Robertson, J. B.
(Technion - Israel Inst. of Tech. Haifa, Israel)
Hatfield, J. J.
(NASA Langley Research Center Flight Electronics Div., Hampton, VA, United States)
Date Acquired
August 10, 2013
Publication Date
December 1, 1981
Publication Information
Publication: Journal of Guidance and Control
Volume: 4
Subject Category
Distribution Limits