Modeling and control of a dual stage actuator hard disk drive with piezoelectric secondary actuator

Roberto Oboe, Alessandro Beghi, Bruno Murari

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

High capacity of new magnetic material can be exploited only with a fine servo-positioning of the hard disk heads. This can be achieved by means of dual stage actuation, where the secondary actuator can be realized with different technologies. In this paper, the need for a secondary actuator is proven by explicitly including the nonlinear friction on the VCM bearings. The use of a piezoelectric secondary actuator is analyzed, first by determining the dynamic model of piezo-based dual stage actuator system, then by including a detailed model of the piezoelectric actuator, comprehensive of the effects of voltage or charge driving. With this detailed model, different control strategies are evaluated. The results reported here suggest that voltage-driven piezoelectric actuators should not be used in fine servo-positioning. Instead, charge driven actuators exhibit promising performances when used with the control strategies proposed here.

Original languageEnglish
Title of host publicationIEEE/ASME International Conference on Advanced Intelligent Mechatronics, AIM
PublisherIEEE
Pages138-143
Number of pages6
Publication statusPublished - 1999
EventProceedings of the 1999 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM '99) - Atlanta, GA, USA
Duration: Sep 19 1999Sep 23 1999

Other

OtherProceedings of the 1999 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM '99)
CityAtlanta, GA, USA
Period9/19/999/23/99

ASJC Scopus subject areas

  • Engineering(all)

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