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Nonlinear Vibrations of Piezoelectric Microactuators in Hard Disk Drives
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 Title & Authors
Nonlinear Vibrations of Piezoelectric Microactuators in Hard Disk Drives
Jeong, Deok-Yeong; Lee, Seung-Yeop; Kim, Cheol-Sun;
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Nonlinear vibration characteristics of a piezoelectric-type micro actuator used for hard disk drives are experimentally studied. The nonlinear characterisitics include hysteresis, superharmonic resonance, jump phenomenon, and shifting of natural frequencies. The vibration modes and frequencies of the commercial actuator of the Hutchinson's Magnum series are measured using a laser vibrometer. From harmonic excitation to the PZT acturator, we observe interesting hysteresis patterns with 3 times input frequency. It is shown that the micro actuator has the typical 3 times superhamonic resonances coupled to the first torsional and sway modes of the suspension.
Hard Disk Drive;Microactuator;Nonlinear Vibration;Superharmonic Resonance;Hysteresis;
 Cited by
바이몰프 PZT 캔틸레버 특성평가 및 응용연구,김석삼;채영훈;권현규;

한국윤활학회지, 2003. vol.19. 3, pp.133-138
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