Compensation for Transport Delays Produced by Computer Image Generation Systems.
Final rept. Nov 76-May 78,
NAVAL TRAINING EQUIPMENT CENTER ORLANDO FLA
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This report describes a cooperative NavyAir Force effort aimed at the problem of image-flutter encountered when visual displays that present computer-generated images are used for the simulation of certain flying situations. Two experiments are described that extend laboratory work on delay compensation schemes to the simulation of formation flight in a research device -- the Advanced Simulator for Pilot Training. The scheme used was one where low-pass filters were added to the lead-generation software of the visual display system. Both studies were geared to determining break-points for those filters that would allow adequate flying control performance and provide an acceptable display. These experiments were based on the notion that a trade exists between the suppression of the visual images flutter and the removal of the low frequency information necessary for flight control. One experiment represented a factorial combination of settings of the display filters and the non-visual cues of aircraft motion provided by the ASPTs g-seat and motion platform, and the second represented a simple comparison of filter settings. Both studies indicated that, at least for formation flight, there is a range of filter settings which will not adversely affect flight control and will adequately suppress visual flutter. This range represents half-power settings for the filters of 34 to 1 Hertz. Author
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- Human Factors Engineering and Man Machine Systems