McLeod R W, Griffin M J
Human Factors Research Unit, University of Highfield, Southampton, England.
Aviat Space Environ Med. 1990 Mar;61(3):211-9.
An experiment is described in which two independent groups of eight subjects each performed a combined continuous and discrete tracking task during exposure to vertical whole-body vibration. Both groups received sinusoidal and random vibration at preferred third-octave centre frequencies of 0.5-10 Hz. One group performed the task with the display collimated by a convex lens. Without the collimation, performance was disrupted by both types of vibration at all vibration frequencies; collimation removed the disruption at frequencies above 1.6 Hz. There were differences in the effects of random and sinusoidal vibration at 2.0 and 2.5 Hz, suggesting that compensatory eye movements were assisting performance during exposure to the predictable sinusoidal motion. The results show that continuous control performance was disrupted by visual interference at frequencies above 1.6 Hz; closed-loop system transfer functions showed that visual interference increased the phase lags which impaired control performance. Possible mechanisms explaining the disruption in performance at lower frequencies are discussed.
本文描述了一项实验，其中两组各有八名受试者，在垂直全身振动暴露期间执行连续和离散相结合的跟踪任务。两组均在0.5 - 10Hz的首选倍频程中心频率下接受正弦和随机振动。一组在显示屏通过凸透镜准直的情况下执行任务。没有准直时，在所有振动频率下，两种类型的振动都会干扰性能；准直消除了1.6Hz以上频率的干扰。在2.0和2.5Hz时，随机振动和正弦振动的影响存在差异，这表明在暴露于可预测的正弦运动期间，补偿性眼球运动有助于提高性能。结果表明，在1.6Hz以上频率，连续控制性能受到视觉干扰的破坏；闭环系统传递函数表明，视觉干扰增加了相位滞后，从而损害了控制性能。文中讨论了解释低频性能破坏的可能机制。
