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�������պ����ѧѧ�� 2008, Vol. 34 Issue (11) :1250-1253    DOI:
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��ݷ�, �� ��*
�������պ����ѧ �ѧԺ, ���� 100191
Fuzzy control law design of hypersonic vehicle based on genetic algorithm
Li Huifeng, Wang Jian*
School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

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Abstract�� Considering the pitching channel of air breathing hypersonic vehicle X-43A as plant, flight control system was designed according to the 6 degree of freedom nonlinear model. The flight control system includes two loops, of which the structure is conventional mode. The guidance loop is a PD controller, while the control loop is composed of two fuzzy logic controllers. The guidance loop leads the vehicle to follow trajectory, when the control loop follows guidance command. Based on genetic algorithm, the optimization process of PD feedback parameters and fuzzy logic control rules was carried out automatically, which means expert knowledge and training data are not necessary in advance. This optimization process solved the problem of obtaining fuzzy logic control rules. Nonlinear dynamics, uncertainties and restrictions were contained in research on the control of trajectory, attitude and thrust. Simulations show that the method is able to satisfy both the robustness of flight control system and the convergence of optimization process on request.
Keywords�� hypersonic   fuzzy control   PD control   genetic algorithm   robustness     
Received 2007-11-08;
About author: ��ݷ�(1970-),Ů,�����ѳ���,������,leehuifeng@buaa.edu.cn.
��ݷ�, �� ��.�����Ŵ��㷨�ĸ��ٷ�����ģ�����������[J]  �������պ����ѧѧ��, 2008,V34(11): 1250-1253
Li Huifeng, Wang Jian.Fuzzy control law design of hypersonic vehicle based on genetic algorithm[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2008,V34(11): 1250-1253
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