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�������պ����ѧѧ�� 2002, Vol. 28 Issue (5) :524-527    DOI:
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Dynamic Response Analysis of Direction Control for Semi��Differential Co��Axial Helicopter
CHEN Ming, HU Ji-zhong, CAO Yi-hua*
Beijing University of Aeronautics and Astronautics, Dept. of Flight Vehicle Design and Applied Mechanics

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Abstract�� The dynamic equation of a semi-differential co-axial helicopter in vertical flight was set up and solved based on classical vortex theory and character of aerodynamic interference between upper and lower rotors of the co-axial helicopter. There exists a coupling relationship between vertical movement and direction rotation with direction control in vertical flight of the helicopter. Calculation example results indicate that the equations of dynamic response proposed for vertical movement and direction rotation reflect flight character of this helicopter.
Keywords�� co-axial helicopter   aerodynamic interference   dynamic response   semi-differential control   directional control     
Received 2001-01-04;
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����, ������, ���廪.����ʽֱ������������ݵ� ��̬��Ӧ����[J]  �������պ����ѧѧ��, 2002,V28(5): 524-527
CHEN Ming, HU Ji-zhong, CAO Yi-hua.Dynamic Response Analysis of Direction Control for Semi��Differential Co��Axial Helicopter[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2002,V28(5): 524-527
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