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Title: Dynamics and reliability of access system of high density magnetic recording
Authors: HE ZHIMIN
Keywords: magnetic recording, dynamics, access system, piezoelectric actuators, probability, reliability
Issue Date: 8-Dec-2006
Citation: HE ZHIMIN (2006-12-08). Dynamics and reliability of access system of high density magnetic recording. ScholarBank@NUS Repository.
Abstract: To meet the continuous increase in demand for improved performances in the servo mechanical system of magnetic recording access system, several novel structures for the actuators/micro-actuators are proposed and their dynamic performances are characterized through simulation, optimization, prototyping and experimental investigations. These structures include: 1) a force coupled actuator to suppress the lateral translational vibration motion mode; 2) a flexural pivot for use in disk drive actuator to achieve a friction free and potentially cost-low design; 3) an actuator assembly with small skew actuation; and 4) a split electrodes piezoelectric suspension for dual-stage head positioning. This research also addresses the reliability evaluation and lifetime estimation of the piezoelectric actuators by proposing a probabilistic approach, i.e., P-E-N curve and the electric load-strength interference model. The reliability model is further extended to a two-dimensional case to take into account both electric driving voltage and temperature effects.
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