Title :
Experimental and theoretical studies of PZT glide head vibration
Author :
Ou-Yang, Jin-Hui ; Tsay, Alex Y. ; Shen, I.Y. ; Kuo, David
Author_Institution :
Dept. of Mech. Eng., Washington Univ., Seattle, WA, USA
fDate :
9/1/1999 12:00:00 AM
Abstract :
This paper studies the natural frequencies of a PZT glide head through calibrated experiments and a finite element analysis (FEA). In the experimental studies, the PZT served as an actuator exciting the glide head from 100 kHz to 1.3 MHz, and a laser Doppler vibrometer (LDV) measured the displacement of the glide head at the inner or outer rail. The natural frequencies were measured through PZT impedance and frequency response functions of PZT to LDV. In FEA, the slider, PZT, and glue (epoxy) were meshed by brick elements. Natural frequencies predicted from FEA agree well with the experimental results with a 5% difference. Therefore, modeling of the epoxy layer is critical in predicting the natural frequencies of PZT glide heads
Keywords :
finite element analysis; frequency response; lead compounds; magnetic disc storage; mechanical contact; piezoceramics; piezoelectric actuators; quality control; vibrations; zirconium compounds; 100 kHz to 1.3 MHz; FEA; PZT; PZT actuator; PZT frequency response function; PZT glide head vibration; PZT impedance function; PbZrO3TiO3; brick elements; calibrated experiments; disc manufacture; disc media quality control; epoxy layer modelling; finite element analysis; glide head displacement; glide testing; laser Doppler vibrometer; natural frequencies; slider; Actuators; Displacement measurement; Finite element methods; Frequency measurement; Frequency response; Impedance measurement; Laser theory; Predictive models; Rails; Vibrometers;
Journal_Title :
Magnetics, IEEE Transactions on
