The Use of Displacement, Flash, and Depth-of-Flash Coded Displays for Providing Control System Information

摘要

Two experiments were performed to investigate the use of brightness-coding and flash-coding techniques for presenting information usually provided by displacement displays. The first experiment compared a conventional displacement display with this same display incorporating flash coding, using one of two frequencies to indicate high or low error direction. The results of the study showed that at longer viewing ranges, at which the displacement cannot be discriminated, tracking performance was enhanced by the addition of flash coding to the displacement display. The second experiment, using a point source of light, compared flash coding (of error direction) with combined flash and brightness coding(of error direction plus magnitude). This latter display, termed 'depth of flash,' was found to be superior after a relatively short learning period. The findings indicate that the depth-of-flash technique may be a fruitful approach in the development of an effective landing aid. (Author)