Experimental and theoretical studies of PZT glide head vibration

• Published in: IEEE transactions on magnetics Vol. 35; no. 5; pp. 2493 - 2495
• Main Authors: Jin-Hui Ou-Yang, Tsay, A.Y., Shen, I.Y., Kuo, D.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.09.1999; Institute of Electrical and Electronics Engineers
• Subjects: Actuators; Applied sciences; Displacement measurement; Electronics; Exact sciences and technology; Finite element methods; Frequency measurement; Frequency response; Impedance measurement; Laser theory; Magnetic devices; Other magnetic recording and storage devices (including tapes, disks, and drums); Predictive models; Rails; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Vibrometers; Head disk interface; Finite element method; Vibration; Theoretical study; Numerical simulation; Magnetic head; Drive mechanism; PZT; Magnetic recording
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/20.800869

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.