Helicopter pilot performance in degraded visual conditions may be improved through sensor fusion and an augmented reality display. A simulator experiment with 12 participants was done to test the effect of synthetic terrain grid cell size and helicopter heave dynamics on task performance and control behaviour in a terrain-following hill-climb task. An increase in grid cell size lowered task performance and increased control activity due to reduced optical information. Slower heave dynamics decreased task performance and led to a more prospective control strategy. It was concluded that an effective AR terrain display for altitude control can be designed independently from the vehicle dynamics.
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