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Longitudinal aerodynamic estimation and flight tests for airship
Cui Xiumin, Wang Weijun, Fang Zhenping*
School of Aeronautic Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

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Abstract�� The longitudinal aerodynamic parameters of an airship were estimated in defect of the data from wind tunnel test, using the form in compilers group of aerodynamic handbooks. The characteristic of the airship was analyzed, using the linear small-disturbance equations, which was acquired from the linear small-disturbance equations of the low-velocity airplane. The PID (proportion, integration and differentiation) control-law was designed and it’s simulation wasdone in the Simulink toolbox of the Matlab software, which was used in the design. The height-holding flight control law was presented, observing the time-response. The auto-long-flight was realized in the actual test. The time of flight was 20min and the ideal fight-altitude was 300 m. The approximation was found, through comparing the actual flight test with the ideal result. It shows that the control law is valid and the aerodynamic estimation method is valuable.
Keywords�� airships   flight tests   height-holding control law     
Received 2004-03-26;
About author: ������(1980-),Ů,������������,˶ʿ��, 2002cuixiumin@163.com.
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������, ��ά��, ����ƽ.ij��ͧ�����������㼰������֤[J]  �������պ����ѧѧ��, 2005,V31(08): 879-883
Cui Xiumin, Wang Weijun, Fang Zhenping.Longitudinal aerodynamic estimation and flight tests for airship[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2005,V31(08): 879-883
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