Authors: J.P. Yang and S.X. Chen
Affilation: National University of Singapore, United States
Pages: 326 - 329
Keywords: piezo-microactuator, head gimbal assembly, hard disk drive, FEM, vibration
With areal recording density of hard disk drives (HDD) historically growing at an average of 60% per year, it is becoming increasingly more difficult to maintain the precise positioning required of the ever-smaller GMR heads to read and write data. It is predicted that 100 Gb/in 2 HDD areal density would be probably delivered by 2003. To reach such high track densities, the lower mechanical disturbances and higher servo-control bandwidth is required. The dual-stage servo system has been considered as the most promising solution. The motivation of this work is to analyze the effects of the slider-driven micro-actuator placements and profiles on head gimbal assembly (HGA) microactuator sway mode. Results showed that the sway mode frequency was obviously increased by selecting micro-actuator placements and its profiles, optimally.
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