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Proceedings Paper

Study on the bifurcation and chaos of giant magnetostrictive actuators
Author(s): Hai-quan Zeng; Wen-wang Li
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Paper Abstract

Nonlinearity between exciting current and output displacement spoils giant magnetostrictive actuators'(GMA) performance. Chaotic and Quasi-periodic motions are important aspects of nonlinear character for GMA. To explore the erratic behaviors of GMA, a nonlinear dynamic model was established. The bifurcation diagrams, phase portrait, Poincaré mapping diagrams, amplitude spectrum, Lyapunov exponent, etc. which demonstrate dynamical characteristics of the system were obtained by numerical integration. Analysis indicates: Nonlinearity of response could be improved by increasing of damping coefficient. Chaos would appear when stiffness of the system is relatively low. At frequencies below 20Hz, exciting current also brings chaos. When exciting current frequency approaches natural frequency of the system, beat vibration will occur.

Paper Details

Date Published: 21 October 2009
PDF: 7 pages
Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74934C (21 October 2009); doi: 10.1117/12.839988
Show Author Affiliations
Hai-quan Zeng, Xiamen Univ. of Technology (China)
Wen-wang Li, Xiamen Univ. of Technology (China)


Published in SPIE Proceedings Vol. 7493:
Second International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Anand K. Asundi; Wolfgang Ecke, Editor(s)

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