Abstract
Microgravity effects on human factor were observed through a series of manual control experiments conducted in the First Material Processing Test. The Japanese Payload Specialist, who operated a stick to control a double integral controlled element against pseudo-random disturbance, felt pain in fast eye movement during orbital experiments. He was obliged to fix his line of sight at the center of display and to watch the displayed error movement using peripheral view. He also felt difficulty in supporting his body against reaction force of his hand movement. During two or three days after landing, disturbance was observed in the PS's posture. The operator's input and output data wiIl be analyzed by the cross spectral analysis to obtain the operator describing function and the remnants. Such data wiII be utilized in space man-machine system design. EIectro-myogram of hand and electro-oculogram data will also be analyzed.
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