On improving head-disk interface in hard disk drives using active control

Shan Min Swei, Peng Gao

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


How to improve head disk interface (HDI) characteristics in the mechanical design of hard disk drives (HDDs) has become increasingly important due to ever-growing demand for storage density and access speed. In this paper, an active actuation and control of the suspension structure in HDDs utilizing the piezo-films is investigated. Its applications in reducing head-disk friction/wear and suppressing induced vibrations are studied. An analytical model for a cantilever beam like structure with the bonded piezo-films is presented. A direct output feedback control is proposed and its effectiveness in suppressing induced vibrations is demonstrated both theoretically and experimentally.

Original languageBritish English
Pages (from-to)3106-3111
Number of pages6
JournalProceedings of the IEEE Conference on Decision and Control
StatePublished - Dec 2000


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