Improved design of piezoelectric micro-actuators for HDD

Gih Keong Lau; Hejun Du

doi:10.1117/12.469408

Improved design of piezoelectric micro-actuators for HDD

Gih Keong Lau^*, Hejun Du

^*Corresponding author for this work

Department of Mechanical Engineering

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

This paper presents a design of piezoelectric micro-actuator with improved stroke sensitivity and adequate level of lateral resonant frequency for hard disk drive (HDD) application. The improved design employed active piezoelectric elements in push-pull configuration, and two flexural serpentines with inverse-T slits in between them. Instead of adopting conventional design of physical hinge, the two flexural serpentines allow flexural rotations of load beam about an artificial hinge at larger magnification factors. The present design also allows easy adjustment between stroke sensitivity and lateral resonant frequency, which are conflicting with each other, through placement of piezoelectric elements.

Original language	English
Pages (from-to)	113-119
Number of pages	7
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4935
DOIs	https://doi.org/10.1117/12.469408
State	Published - 2002
Event	Smart Structures, Devices, and Systems - Melbourne, VIC., Australia Duration: 16 Dec 2002 → 18 Dec 2002

Keywords

Design optimization
Dual-stage actuators
Hard disk drives
Piezoelectric micro-actuators

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10.1117/12.469408

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abstract = "This paper presents a design of piezoelectric micro-actuator with improved stroke sensitivity and adequate level of lateral resonant frequency for hard disk drive (HDD) application. The improved design employed active piezoelectric elements in push-pull configuration, and two flexural serpentines with inverse-T slits in between them. Instead of adopting conventional design of physical hinge, the two flexural serpentines allow flexural rotations of load beam about an artificial hinge at larger magnification factors. The present design also allows easy adjustment between stroke sensitivity and lateral resonant frequency, which are conflicting with each other, through placement of piezoelectric elements.",

keywords = "Design optimization, Dual-stage actuators, Hard disk drives, Piezoelectric micro-actuators",

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AB - This paper presents a design of piezoelectric micro-actuator with improved stroke sensitivity and adequate level of lateral resonant frequency for hard disk drive (HDD) application. The improved design employed active piezoelectric elements in push-pull configuration, and two flexural serpentines with inverse-T slits in between them. Instead of adopting conventional design of physical hinge, the two flexural serpentines allow flexural rotations of load beam about an artificial hinge at larger magnification factors. The present design also allows easy adjustment between stroke sensitivity and lateral resonant frequency, which are conflicting with each other, through placement of piezoelectric elements.

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KW - Dual-stage actuators

KW - Hard disk drives

KW - Piezoelectric micro-actuators

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JO - Proceedings of SPIE - The International Society for Optical Engineering

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T2 - Smart Structures, Devices, and Systems

Y2 - 16 December 2002 through 18 December 2002

ER -

Improved design of piezoelectric micro-actuators for HDD

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Keywords

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