Robust Repetitive Perfect Tracking Control of HDDs Based on Re-learning Scheme

• Fujimoto Hiroshi

  Department of Advanced Energy, Graduate School of Frontier Sciences, The University of Tokyo

Abstract

This paper presents an improved method of a repetitive controller based on perfect tracking control (PTC) in order to reject the variable repeatable runout (RRO) of hard disk drives (HDDs). The author's group proposed repetitive PTC (RPTC) with a switching mechanism. RPTC is realized by using periodic a signal generator (PSG) and PTC. The PSG produces a feedforward signal from the periodic disturbance, and the PTC generates a control input to cancel the periodic error in the steady state. However, we have not considered the difference between the RROs of tracks. This paper proposes a re-learning scheme by taking into account the correlation of adjacent tracks. Finally, the advantages of RPTC using the proposed scheme are demonstrated through simulations and experiments using a hard disk drive equipment with discrete track recording media (DTR).

Journal

• IEEJ Journal of Industry Applications

  IEEJ Journal of Industry Applications 2 (1), 40-47, 2013

  The Institute of Electrical Engineers of Japan

Keywords

• multirate control
• repeatable runout compensation
• re-learning
• discrete track recording media

Details

• CRID: 1390282680392786944
• NII Article ID: 130003379490
• DOI: 10.1541/ieejjia.2.40
• ISSN: 21871108
• ISSN: 21871094
• NDL BIB ID: 024195516
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I024195516
• Web Site: https://www.jstage.jst.go.jp/article/ieejjia/2/1/2_40/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed