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    题名: Dynamics of a nonlinear electromagnetic system
    作者: Chang,SC;Tung,PC
    贡献者: 機械工程研究所
    关键词: DUFFING OSCILLATOR;CHAOTIC MOTION;BIFURCATIONS
    日期: 1999
    上传时间: 2010-06-29 18:03:09 (UTC+8)
    出版者: 中央大學
    摘要: An experiment with a test rig consisting of a symmetric rotor suspended by a spring device and excited by a series of nonlinear electromagnetic forces has been performed by Chang and Tung [Sound & Vib. 214 (1998) 853]; to investigate the effects of an electromagnet processing highly nonlinear characteristics on general mechanical systems. A nonlinear mathematical model has been obtained by applying a modified conventional identification technique based on the principle of harmonic balance. In this study, analytical work is carried out on this identified nonlinear model by applying the first-harmonic approximation solution and the Floquet theory. The resulting criteria for bifurcations can be used to evaluate the operational range of a system employing such a nonlinear actuator. We also employ the method of Lyapunov exponents to show the occurrence of chaotic motion and to verify the above analyses. A comparison of the analytical results with those of the experiment shows that the identified nonlinear model obtained from the experiment can predict and characterize the dynamics of a real electromagnetic system.
    關聯: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS
    显示于类别:[機械工程研究所] 期刊論文

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