Actuated suspensions with enhanced dynamics for hard disk drives

Hejun Du*, Gih Keong Lau, Bo Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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 languageEnglish
Pages (from-to)2887-2889
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number10
StatePublished - 1 Oct 2005


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

Fingerprint Dive into the research topics of 'Actuated suspensions with enhanced dynamics for hard disk drives'. Together they form a unique fingerprint.

Cite this