20 October 2009 Study on the bifurcation and chaos of giant magnetostrictive actuators
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Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 74934C (2009) https://doi.org/10.1117/12.839988
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China
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.
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Hai-quan Zeng, Wen-wang Li, "Study on the bifurcation and chaos of giant magnetostrictive actuators", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 74934C (20 October 2009); doi: 10.1117/12.839988; https://doi.org/10.1117/12.839988
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