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�������պ����ѧѧ�� 2007, Vol. 33 Issue (04) :431-434    DOI:
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Control of chaotic oscillation for helicopter rotor blade
Liang Tingwei, Wang Qi*
Department of Automation Measurement and Control, Harbin Institute of Technology, Harbin 150001, China

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Abstract�� The flapping model of rotor blade can be expressed as the model of Duffing′ oscillator with periodic exciting force in the dynamic balance test of helicopter rotor. To control the chaotic vibration in flapping, a method of changing exciting signals in Duffing′ model was proposed to restrain the chaos state in Duffing′ system. To couple a triple-period exciting signal in Duffing′ model, with the analytic method of Melnikov′ function based on chaos analysis, the chaos threshold of Duffing′ function were analyzed in the states of periodic exciting signal only, triple-period exciting signal only or combined action of the two signals respectively. Simulation experiments were also conducted according to the three kinds of exciting signals. The results indicate that the chaos range is reduced more evidently by coupling the triple-period exciting signal than that by period exciting signal only.
Keywords�� rotor blade   dynamic balance test   chaos threshold   chaos control     
Received 2006-05-31;
Fund:

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About author: ��͢ΰ(1967-),��,��������������,��ʿ��,liangtingwei@hit.edu.cn.
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��͢ΰ, ����.ֱ������Ҷ�����񶯿���[J]  �������պ����ѧѧ��, 2007,V33(04): 431-434
Liang Tingwei, Wang Qi.Control of chaotic oscillation for helicopter rotor blade[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2007,V33(04): 431-434
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