A push-pull multi-layered piggyback PZT actuator
| Autor: | Shigeo Nakamura, H. Numasato, Kazutaka Sato, Irizo Naniwa, M. Kobayashi |
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| Rok vydání: | 2002 |
| Předmět: |
Engineering
Precision engineering business.industry Acoustics STRIPS Servomechanism Condensed Matter Physics Piezoelectricity Suspension (motorcycle) Electronic Optical and Magnetic Materials law.invention Hardware and Architecture Control theory law Head (vessel) Electrical and Electronic Engineering Actuator business Low voltage |
| Zdroj: | Microsystem Technologies. 8:149-154 |
| ISSN: | 1432-1858 0946-7076 |
| DOI: | 10.1007/s00542-002-0180-z |
| Popis: | To increase the recording density of hard disk drives (HDDs), we developed a push–pull multi-layered piggyback PZT actuator that enables fine positioning by a dual-stage servo system. This PZT actuator consists of 31-mode push–pull multi-layered PZT strips and a head suspension. It generates a 1.4-μm effective radial head displacement at 5 V. This displacement is twice that of conventional piggyback actuators. The main resonance frequency of the actuator is higher than 9 kHz, its lifetime is longer than five years, and it has a self-latch property. These features mean that the developed actuator can meet all the requirements for implementation in HDD servo systems, including a track density of 100 kTPI (kilo-tracks per inch). The actuator was implemented in two types of HDDs (A-type and B-type), which reduced the repeatable and non-repeatable positioning errors (by 40 to 45% and 28 to 34%, respectively). |
| Databáze: | OpenAIRE |
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