Human Factors Division
نویسندگان
چکیده
Executive Summary of Findings This document contains review of literature on the effects of vibration on human performance. It is intended to address the issues relevant to reported difficulties in the use of the XM4 Command and Control Vehicle while the vehicle is in motion. The focus of this review is on the effects of vibration on visual task, with additional consideration given to manual tasks, as well as motion sickness. Below are listed some of the main findings from the literature reviewed. • Vertical (z-axis) sinusoidal translation induced by a vibration simulator is the most common way of testing the effects of vibration, and it is often used as an approximation for other forms of vibration. • The research base for establishing the generalizability of single-frequency, Z-axis vibration to multiple frequency, multiple-axis vibration is very sparse. • Seating and posture, as well as individual differences between operators, influence strongly the effects of vibration on human performance. • Small increases in display size, resolution, and vertical spacing can yield large payoffs in legibility for text viewed during vibration. • Collimation of visual displays improves performance under vibration. • The considerations for legibility-during-vibration are only marginally different than those of legibility without vibration, with the exception of a recommendation for larger vertical text spacing. • There is no evidence of research comparing different display-styles, such as graphic displays compared to text-based displays. • There are a number of ways of simulating the effects of vibration, including specific techniques of blurring of visual stimulus, as well as computer modeling for the effects of vibration. • Motion sickness (kinetosis) is extensively researched, and the mechanisms involved are only partially understood. While there are a number of possible interventions, including drugs, training, and artificial displays, they offer only a partial solution to the problem of kinetosis.
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