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首页> 外文期刊>The Aeronautical Journal >HELIPLAT®: high altitude very-long endurance solar powered UAV for telecommunication and Earth observation applications
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HELIPLAT®: high altitude very-long endurance solar powered UAV for telecommunication and Earth observation applications

机译：HELIPLAT®：用于电信和地球观测应用的高海拔超长续航太阳能无人机

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摘要

Research is at present being carried out at the Turin Polytechnic University with the aim of designing an HAVE/UAV (high altitude very-long endurance/unmanned air vehicle). The vehicle should climb to 17-20km by mainly taking advantage of direct Sun radiation and thereafter maintain a level flight; during the night, a fuel cells energy storage system would be used. A computer program has been developed to carry out a parametric study for the platform design. The solar radiation change over one year, the altitude, masses and efficiencies of the solar and fuel cells, and the aerodynamic performances have all been taken into account. The parametric studies have shown how fuel cells and solar cells efficiency and mass have the most influence on the platform dimensions. A wide use of high modulus CFRP has been made in designing the structure in order to minimise the airframe weight. A first configuration of HELIPLAT® (HELIos PLATform) was worked out, following a preliminary parametric study. The platform is a monoplane with eight brushless electric motors, a twin-boom tail type with an oversized horizontal stabiliser and two rudders. The co-ordinates at the root and along the wing span as well as the wing planform were optimised to achieve the best efficiency. Several profiles and wing plans have been analysed using the CFD software Xfoil and Vsaero. Several wind-tunnel tests were carried out to compare the analytically predicted performances. A preliminary design of a scale-sized technological demonstrator was completed with the aim of manufacturing a proof-of-concept structure. A FEM analysis was carried by using the Msc/Patran/Nastran code to predict the static and dynamic behaviour of the UAV structure.
机译：目前正在都灵工业大学进行研究，目的是设计一种HAVE / UAV（高海拔超长耐力/无人飞行器）。车辆应主要利用太阳直接辐射，爬升至17-20公里，然后保持水平飞行；在夜间，将使用燃料电池储能系统。已经开发了计算机程序来进行平台设计的参数研究。太阳辐射在一年中的变化，太阳能电池和燃料电池的高度，质量和效率以及空气动力学性能都已被考虑在内。参数研究表明，燃料电池和太阳能电池的效率和质量如何对平台尺寸产生最大影响。为了最小化机身重量，在设计结构时已广泛使用高模量CFRP。在初步的参数研究之后，确定了HELIPLAT®（HELIos PLATform）的第一种配置。该平台是一个单翼飞机，带有八个无刷电动机，一个双动臂尾翼型，一个超大水平稳定器和两个舵。优化了在根部和沿机翼跨度以及机翼平面形状的坐标，以实现最佳效率。使用CFD软件Xfoil和Vsaero分析了几种轮廓和机翼计划。进行了几次风洞测试，以比较分析预测的性能。规模化技术演示器的初步设计已完成，目的是制造概念验证结构。通过使用Msc / Patran / Nastran代码进行FEM分析，以预测UAV结构的静态和动态行为。

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  • 来源
    《The Aeronautical Journal》 |2004年第1084期|p.277-293|共17页
  • 作者

    G. Romeo; G. Frulla;

  • 作者单位

    Department of Aerospace Engineering Politecnico di Torino (Turin Polytechnic University) Turin, Italy;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 航空;
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