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�������պ����ѧѧ�� 2004, Vol. 30 Issue (05) :419-424    DOI:
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Aerodynamic estimation and trim analysis for a tethered balloon
Jiao Zhiqiang, Hong Guanxin, Yang Chao*
School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� The aerodynamic characteristics of a tethered balloon with inverted "Y" fins were estimated by the traditional aerodynamic estimation from the flight dynamics analysis viewpoint. Taking into account the whole cable-body system, the nonlinear force trims equations and nonlinear moment trim equations were established and calculated. For the different wind speed, the equilibrium points could be got from the trim equations solving by Newton iteration method. Comparing the trim states of the different wind speed and different junction point of the cable, the better junction point of the rope could be confirmed.
Keywords�� flight mechanics   aerodynamic forces   balloons   inverted "Y"   fins   aerodynamic estimation     
Received 2002-12-20;
About author: ��־ǿ(1977-),��,������������,˶ʿ��, jiao michael@sina.com.
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��־ǿ, �����, �.ϵ��������������������ƽ����[J]  �������պ����ѧѧ��, 2004,V30(05): 419-424
Jiao Zhiqiang, Hong Guanxin, Yang Chao.Aerodynamic estimation and trim analysis for a tethered balloon[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2004,V30(05): 419-424
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http://bhxb.buaa.edu.cn//CN/     ��     http://bhxb.buaa.edu.cn//CN/Y2004/V30/I05/419
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