Actuated suspensions with enhanced dynamics for hard disk drives

Hejun Du; Gih Keong Lau; Bo Liu

doi:10.1109/TMAG.2005.854459

Actuated suspensions with enhanced dynamics for hard disk drives

Hejun Du^*, Gih Keong Lau, Bo Liu

^*Corresponding author for this work

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

This paper presents two novel designs of piezoelectric milli-actuators for secondary-stage head positioning. The designs are an in-line-actuated suspension and a quad-morph actuated suspension, which use a piezoelectric plate and a piezoelectric quad-morph, respectively, to drive a parallel mechanism into lateral stroke. The inline design at elongated portion of a slender load beam is capable of enhancing the first torsional frequency; whereas, the quad-morph design at the extended base plate is capable of enhancing the first sway frequency. Both designs produce adequate lateral stroke. The proof of concepts was confirmed using finite-element simulation and experimental modal testing.

Original language	English
Pages (from-to)	2887-2889
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	41
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2005.854459
State	Published - 1 Oct 2005

Keywords

Actuated suspensions
Dual-stage actuators
Instrumented suspensions
Piezoelectric milli-actuators

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title = "Actuated suspensions with enhanced dynamics for hard disk drives",

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AB - This paper presents two novel designs of piezoelectric milli-actuators for secondary-stage head positioning. The designs are an in-line-actuated suspension and a quad-morph actuated suspension, which use a piezoelectric plate and a piezoelectric quad-morph, respectively, to drive a parallel mechanism into lateral stroke. The inline design at elongated portion of a slender load beam is capable of enhancing the first torsional frequency; whereas, the quad-morph design at the extended base plate is capable of enhancing the first sway frequency. Both designs produce adequate lateral stroke. The proof of concepts was confirmed using finite-element simulation and experimental modal testing.

KW - Actuated suspensions

KW - Dual-stage actuators

KW - Instrumented suspensions

KW - Piezoelectric milli-actuators

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JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

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Actuated suspensions with enhanced dynamics for hard disk drives

Abstract

Keywords

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