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Rotorcraft brownout mitigation through flight path optimization using a high fidelity rotorcraft simulation model.

机译:通过使用高保真旋翼飞机仿真模型优化飞行路径来减轻旋翼飞机的电力不足。

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摘要

Brownout conditions often occur during approach, landing, and take off in a desert environment and involve the entrainment and mobilization of loose sediment and dust into the rotor flow field. For this research, a high fidelity flight dynamics model is used to perform a study on brownout mitigation through operational means of flight path. In order for the high fidelity simulation to model an approach profile, a method for following specific profiles was developed. An optimization study was then performed using this flight dynamics model in a comprehensive brownout simulation. The optimization found a local shallow optimum approach and a global steep optimum approach minimized the intensity of the resulting brownout clouds. These results were consistent previous mitigation studies and operational methods. The results also demonstrated that the addition of a full rotorcraft model into the brownout simulation changed the characteristics of the velocity flow field, and hence changing the character of the brownout cloud that was produced.
机译:在接近,着陆以及在沙漠环境中起飞期间,经常会出现电源不足的情况,其中包括将松散的沉积物和灰尘夹带并移动到转子流场中。对于本研究,使用高保真飞行动力学模型通过飞行路径的操作手段进行缓解电力不足的研究。为了使高保真度仿真能够模拟进近剖面,开发了一种用于跟踪特定剖面的方法。然后,在全面的电力不足模拟中使用该飞行动力学模型进行了优化研究。优化发现了局部浅层最优方法,而全局陡峭最优方法使所产生的掉电云的强度最小。这些结果与以前的缓解研究和操作方法一致。结果还表明,将完整的旋翼飞行器模型添加到掉电模拟中会改变速度流场的特性,从而改变所产生的掉电云的特性。

著录项

  • 作者

    Alfred, Jillian Samantha.;

  • 作者单位

    University of Maryland, College Park.;

  • 授予单位 University of Maryland, College Park.;
  • 学科 Engineering Aerospace.
  • 学位 M.S.
  • 年度 2012
  • 页码 156 p.
  • 总页数 156
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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