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Proceedings Paper

Attitude symbology issues for helmet-mounted displays
Author(s): Eleanor C. Davy; Helen J. Dudfield; Thomas D. Hardiman; Anthony J. R. Doyle
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Paper Abstract

One of the major advantages of HMDs is the display of information wherever the pilot is looking. These displays, however, raise important human factor issues for the optimal method of presenting attitude information. For example, problems may occur when the pilot looks off- boresight and is provided with information that is based upon the forward view of the aircraft (i.e. aircraft-referenced) and is thus incongruent. An experiment was conducted to examine this issue in which a traditional pitch ladder format was compared against the novel 'cylinder' format in an off-boresight attitude control task on a simulated HMD. This task involved recovery from unusual positions (UPs) which were presented at various off-boresight angles. Subjects' initial response times were faster for the pitch ladder format than for the two formats for total recovery times, error rates, height deviations, situational awareness rating technique or the questionnaire data. It was concluded that the performance on the cylinder format may be explained by the subjects' past experience using the pitch ladder or by the lack of information available when the aircraft was slightly nose-up or nose-down. It was suggested that improvements should be made to the cylinder if it is to be further examined in future research. Finally, the implications of this research for future work are discussed.

Paper Details

Date Published: 7 June 1996
PDF: 8 pages
Proc. SPIE 2735, Head-Mounted Displays, (7 June 1996); doi: 10.1117/12.241889
Show Author Affiliations
Eleanor C. Davy, Defence Research Agency Farnborough (United Kingdom)
Helen J. Dudfield, Defence Research Agency Farnborough (United Kingdom)
Thomas D. Hardiman, Defence Research Agency Farnborough (United Kingdom)
Anthony J. R. Doyle, Defence Research Agency Farnborough (United Kingdom)

Published in SPIE Proceedings Vol. 2735:
Head-Mounted Displays
Ronald J. Lewandowski; Loran A. Haworth; Wendell Stephens; Henry J. Girolamo, Editor(s)

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