Use of MEMS based accelerometers in hard disk drives

R. Oboe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper we describe the use of MEMS based accelerometers for the compensation of the effects of self-induced and external vibrations in commercial Hard Disk Drives (HDDs). Using a formal analysis on the HDD mechanics, the effects of a generic roto-translation of the HDD on the head position are evaluated. It is also shown that such effects can be compensated by using a feed forward compensation which makes use of a weighted sum of the signals provided by a pair of linear and one rotational accelerometer, properly placed on the HDD's body. As for the rotational acceleration, this has been obtained by using a recently developed MEMS-based, low cost rotational accelerometer. Experimental results presented here show that a 20 dB reduction on a commercial HDD can be achieved with a simple, variable gain feedforward compensator. Effective reduction is achieved up to 200 Hz.

Original languageEnglish
Title of host publicationIEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM
Pages1142-1147
Number of pages6
Volume2
Publication statusPublished - 2001
Event2001 IEEE/ASME International Conference on Advanced Intelligent Mechatronics Proceedings - Como, Italy
Duration: Jul 8 2001Jul 12 2001

Other

Other2001 IEEE/ASME International Conference on Advanced Intelligent Mechatronics Proceedings
CountryItaly
CityComo
Period7/8/017/12/01

Keywords

  • Accelerometers
  • Vibration Suppression

ASJC Scopus subject areas

  • Engineering(all)

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