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首页> 外文期刊>Acta astronautica >Display strobing: An effective countermeasure against visual blur from whole-body vibration
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Display strobing: An effective countermeasure against visual blur from whole-body vibration

机译：显示屏频闪：一种有效的措施，可防止全身振动引起的视觉模糊

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Crews and equipment in aerospace vehicles, including spacecraft at launch, can be exposed to significant vibration. Prior to this study, we examined the ability of vibrating observers to read alphanumeric symbology on stationary (i.e., non-vibrating) flight-relevant display formats and noted performance degradation with increasing vibration amplitude and decreasing font size. Here we test the efficacy of a display strobing countermeasure for the reading decrements caused by the same 12-Hz whole-body vibration in the surge (chest-to-spine) direction applied in our prior studies. To produce the strobe countermeasure, we triggered the backlight of a stationary liquid crystal diode (LCD) display panel to flash in synchrony with the 12-Hz vibration of the observer's seat while experimentally varying both the strobe duty cycle and phase angle between the strobe onset and the vibration cycle zero-crossings. Strobing proved an effective countermeasure, restoring reading error rates during 0.7g (6.9 m/s~2 half-amplitude) whole-body vibration to levels indistinguishable from those achieved under the non-strobed (equivalent luminance) non-vibrating baseline condition and improving response times although not fully to the baseline. While we noted differences in the "preferred" phase angle of individual observers, on average, no overall effect of phase angle was detected. Likewise, no effect was seen for the two duty cycles and their respective equivalent luminance levels. Further studies are needed to determine the efficacy of strobing for multi-axis and multi-frequency vibration, and for displays with moving images.
机译：航天飞机（包括发射时的航天器）中的机组人员和设备可能会受到强烈的振动。在进行这项研究之前，我们检查了振动观察者在固定（即非振动）的与飞行有关的显示格式上阅读字母数字符号的能力，并注意到随着振动幅度的增加和字体尺寸的减小，性能会下降。在这里，我们测试了一种显示选通对策的功效，该对策是针对在先前研究中应用的相同的12 Hz全身振动（在浪涌（从胸部到脊椎）方向上由相同的12 Hz全身振动引起的）造成的。为了产生频闪对策，我们触发了固定液晶二极管（LCD）显示面板的背光灯与观察者座位的12 Hz振动同步闪烁，同时实验性地改变了频闪起始时间之间的频闪占空比和相角和振动周期过零。摇晃被证明是一种有效的对策，将0.7g（6.9 m / s〜2半振幅）全身振动过程中的阅读错误率恢复到与在非频闪（等效亮度）非振动基线条件下所达到的水平相近的水平，并得以改善响应时间，尽管还没有完全达到基线。虽然我们注意到各个观察者的“首选”相角有所不同，但平均而言，未检测到相角的整体影响。同样，对于两个占空比及其各自的等效亮度水平也看不到任何影响。需要进一步的研究来确定频闪对多轴和多频振动以及具有动态图像的显示器的功效。

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