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This research explores the possibility of using the piezo- electric actuator in the computer hard disk drive fly height control. As the demand reises on increased data storage capacity, people have investigated different methods for the hard disk fly height control. Even though most approaches face the difficulty of too much design change and lack of reliablility for a commercial product, the piezo-electric material still demonstrates the most desirable characteristics for this control. In this research, we study the characteristics of the piezo-electric material. We mount the actuator on the base of the suspension so that minimum change in the disk drive configuration is required. In this case the suspension dynamics has to be included as part of the actuator dynamics. An ANSYS finite element model is developed for suspension dynamics together with the piezo-electric material behavior. The simulation includes both static and dynamic characteristics. Experiments are then conducted to confirm the results.
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