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AN INVESTIGATION OF THE HYBRID LTA HAVING ENDURANCE FOR WIND

耐风混合LTA的研究

基本信息

批准号：
04650059
负责人：
KIMURA Haruo
金额：
$ 0.96万
依托单位：
NIPPON BUNRI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04650059/
关键词：
Hybrid LTA Ring-Type Envelope Coaxial Rotors Tandem Rotors 4 Rotors System Computer Mixing ピッチ制御同軸反転ロータサイクリック・ピッチ

项目摘要

(1) The formation of hybrid LTA having maneuvarability and stability sufficient to perform the flight in gusty wind was investigated by means of radio-cotrol models.(2) Two types of envelope of The LTA were presented, one was of doughnut type and another was of elliptic-ring type. Two hericopter-like rotors were set in the cavity portion at the middle of the envelope, coaxially for the doughnut type and tandem for the elliptic-ring type. The direction of rotation of two rotors were taken inversely in order to obtain touque balance.(3) Simple cyclic pitch-control of the rotor-blades was found not to produce the torque sufficient for the control fo attitude and movement of the models. A device was added that enabled tilting motion of the rotor-shafts independently of the envelope. The linear and circular motion of the models could be controlled quickly by the cyclic pitch-control accompanied by the tilting of the rotor shafts, with addition of differential rotor-speed control for circular motion of the coaxialrotor type.(4) Two small side rotors were added to the tandem-rotor type mode. But they produced the torque insufficient to control the rolling motion of the envelope. It has been found that more powerful rotors are needed for that purpose.(5) Drag and Lift of wind-tunnel models of two types of the envelope were measured in an wind tunnel. It has been found that the drag is a little smaller than the drag of the well-known two-dimensional circular column, and the drag of the doughnut type is somewhat smaller than that of the elliptic-ring type.(6) Further improvement of the form of the hybrid LTA will be made, based on the results of the present investigation.

(1)本文用无线电控制模型研究了具有足够的稳定性和不变性的混合型LTA的形成。(2)提出了两种LTA的包络线，一种是圆环型，另一种是椭圆环型。两个赫敏特式的转子被设置在位于封套中部的空腔部分中，对于甜甜圈型同轴，而对于椭圆环型串联。两个转子的旋转方向相反，以获得touque平衡。(3)简单的周期性桨距控制的转子叶片被发现不产生足够的扭矩控制的姿态和运动的模型。增加了一个装置，使倾斜运动的转子轴独立的信封。模型的直线运动和圆周运动可以通过周期性的桨距控制伴随着转子轴的倾斜来快速控制，对于同轴转子类型的圆周运动，增加了差动转子速度控制。(4)两个小侧转子被添加到串联转子类型模式。但它们产生的扭矩不足以控制外壳的滚动运动。已经发现，为此目的需要更强大的转子。(5)在风洞中测量了两种包层模型的阻力和升力。结果表明，该阻力略小于著名的二维圆柱的阻力，而圆环型的阻力略小于椭圆环型的阻力。(6)基于本研究的结果，将对混合型长期协议的形式进行进一步的改进。