Performance evaluation using laser doppler vibrometer sensing technique on advanced lead magnesium niobate-lead titanate piezoelectric-material-based microactuator for hard drive head

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dc.contributor.authorWattananukulchai, Parinya
dc.contributor.authorIsarakorn, Don
dc.date.accessioned2026-08-06T10:18:54Z
dc.date.available2026-08-06T10:18:54Z
dc.date.issued2018-01-01
dc.description.abstractThis paper presents a microactuator for a dual-stage actuator (DSA) of hard disk drive (HDD) based on a lead magnesium niobate-lead titanate (PMN-PT) piezoelectric material and a comparative evaluation of its performance versus that of a traditional lead zirconate titanate (PZT) microactuator using the laser Doppler vibrometer (LDV) sensing technique. PZT microactuator technology has commonly been implemented in the read/write (R/W) magnetic head of HDD. It has a significant function, that is, it moves the magnetic head rapidly and accurately. In order to achieve both accurate positioning control on data tracks and high-speed access across another data track, advanced high-performance actuators and servo control technologies are necessary. An actuator with a wide stroke travel range is essential for HDD as it gives a high-speed access performance. In this study, we focused on comparing the proposed dual-stage PMN-PT head-based actuator with the existing PZT actuator that were mounted on a commercial head gimbal assembly (HGA) using an LDV to determine whether the proposed device could be a worthy replacement of the traditional PZT microactuator. Our experimental results show that the proposed PMN-PT microactuator provided more than twofold improvement in the stroke travel of the R/W magnetic head. Moreover, its dynamic behavior was suitable for assembling a high-density HDD in the future for big data storage without any needs to redesign the HGA nor to costly invest in new assembling machines in a production line. The comparative data of dynamic and static behaviors of PMN-PT versus PZT obtained in this study may be put to good use by sensor designers. Moreover, for many cyber-physical system designers, our data may make them take interest in PMN-PT as a better-performing sensor and an actuator for their systems.
dc.identifier.citationSensors and Materials, 30(10), 2183-2197, 2018
dc.identifier.doi10.18494/SAM.2018.1848
dc.identifier.issn09144935
dc.identifier.other2-s2.0-85055041609
dc.identifier.urihttps://dspace.kmitl.ac.th/handle/123456789/8284
dc.sourceSensors and Materials
dc.subjectDSA
dc.subjectHDD
dc.subjectHGA
dc.subjectPMN-PT
dc.subjectPZT
dc.subjectResonance
dc.subjectStroke
dc.subjectTPI
dc.titlePerformance evaluation using laser doppler vibrometer sensing technique on advanced lead magnesium niobate-lead titanate piezoelectric-material-based microactuator for hard drive head
dc.typeArticle

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