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Low-Cost Accurate Angle-of-Attack System

机译：低成本精确的攻击角度系统

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摘要

A low-cost ($100) differential pressure-based commercial off-the-shelf angle-of-attack data acquisition system was designed, successfully reduced to practice, and wind-tunnel and flight tested. For the underwing-mounted probe studied, the calibration curve, based on the ratio of P-fwd/P-45, is linear throughout the aircraft angle of attack if the probe is located between an estimated 25 and 60% of the local wing chord. A physics-based determination of angle of attack was successful, provided that a reasonably accurate aircraft lift curve is determined. Calculation of the lift curve slope was within approximate to 0.001/deg of the value determined by flight test using an alpha/beta probe. The repeatability of the data from the commercial off-the-shelf system was excellent. Unnormalized differential pressure (P-fwd - P-45), which is dynamic pressure dependent, does not provide adequate accuracy throughout the aircraft angle-of-attack range. Hence, systems similar to that tested, which use unnormalized differential pressure and a linear calibration, are basically only stall warning devices.
机译：设计了一种低成本（100美元）基于差压的商用现货供应攻角数据采集系统，成功将其简化为实践，并进行了风洞和飞行测试。对于研究的安装在机翼下的探头，如果探头位于估计的局部机翼弦的25％至60％之间，则根据P-fwd / P-45的比率，校准曲线在整个飞机攻角范围内都是线性的。只要确定了合理准确的飞机升力曲线，就可以成功地基于物理确定迎角。升力曲线斜率的计算值大约在使用α/β探针通过飞行测试确定的值的0.001 /度范围内。来自商用现货系统的数据可重复性极佳。与动压力有关的非归一化压差（P-fwd-P-45）在整个飞机的攻角范围内都无法提供足够的精度。因此，使用非标准化压差和线性校准的，与测试系统相似的系统基本上只是失速警告装置。

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  • 来源
    《Journal of Aircraft》 |2018年第2期|660-665|共6页
  • 作者

    Martos Borja; Rogers David F.;

  • 作者单位

    Embry Riddle Aeronaut Univ, Eagle Flight Res Ctr, 1585 Aviat Pkwy,Suite 606, Daytona Beach, FL 32114 USA;

    US Naval Acad, Aerosp Engn Dept, 590 Holloway Rd, Annapolis, MD 21401 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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