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A Severity Analysis for Rotorcraft Encounters with Vortex Wakes

机译：旋涡唤醒后旋翼飞机遭遇的严重性分析

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The paper concerns the severity of the response of a rotorcraft encountering the vortex of a fixed-wing aircraft. One of the key questions is whether a rotorcraft designed to meet handling performance standards will have sufficient control margin for the pilot to overcome the effects of a vortex encounter. This question is addressed through an analytical study supported by preliminary piloted simulation tests. The handling qualities criteria are found to be well suited to establishing the severity and associated hazard category of typical encounters. Cases are illustrated where insufficient control margin is available to overcome the effects of the encounter. Pilot intervention time is a critical parameter in the upset severity. In risk assessment parlance, the work suggests that an intervention time of 3 seconds leads to HAZARDOUS encounters ( > Level 3 handling qualities) while with a reduced intervention time of 1.5 seconds, the encounter severity is more likely to be in the MAJOR category (Level 3 handling qualities).
机译：本文涉及旋翼飞机遇到固定翼飞机涡旋的响应的严重性。关键问题之一是设计满足操纵性能标准的旋翼飞机是否具有足够的控制余量，使飞行员能够克服涡旋遭遇的影响。通过初步试验模拟测试支持的分析研究可以解决此问题。发现处理质量标准非常适合确定典型遭遇的严重性和相关危险类别。说明了没有足够的控制余量来克服相遇影响的情况。飞行员干预时间是情绪低落程度的关键参数。用风险评估的话来说，这项工作表明干预时间为3秒会导致危险的遭遇（> 3级处理质量），而减少干预时间为1.5秒，则遇到的严重性很可能属于“重大”类别（级别3处理质量）。

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