Head Tracking at Large Angles from the Straight Ahead Position
SYSTEMS RESEARCH LABS INC DAYTON OH
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The basic purpose of this experiment was to compare head tracking performance at various angles from the straight ahead position. In our previous laboratory studies e.g. Shirachi and Black, 1975 Hornseth, Stanley, and Carson, 1976 and Shirachi, Monk, and Black, 1976 head tracking was performed within a or - 15 deg or less cone about the straight ahead or boresight position. Honeywell has conducted studies in which the subjects aimed their heads as far off boresight as 40 deg Hughes, et al, 1970. Their subjects slewed their heads in the direction indicated by an arrow, on the head position display they were using, until a target came into the field of view of the helmet mounted display. At this point their task became that of laying a reticle over the target to achieve lock on. The length of time the subjects were actually tracking was only a few seconds. Flight test studies conducted at Tyndall AFB and China Lake Dietz, et al, 1971 and Grossman, 1974 investigated head tracking performance which included large off-boresight angles. The target motion in these two studies was highly predictable.
- Human Factors Engineering and Man Machine Systems