Abstract
A new design method - based on a final-state control (FSC) - for short-span seeking in a hard-disk drive (HDD) has been developed. The short-span seeking is performed by two-degree-of-freedom (2-DOF) control, which uses a feedforward (FF) control input along with a reference trajectory. The design method can directly generate the FF control input, whose derivative at a specified order is minimized and whose power spectrum amplitude is reduced at a specified frequency. The residual vibration caused by mechanical resonance can therefore be reduced by the generated FF control input. Test with a 2.5-in form-factor HDD experimentally confirmed that the developed seeking control significantly reduces the residual vibration in a HDD.
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The authors would like to thank Dr. Mitsuo Hirata of Chiba University for his helpful discussions and valuable comments.
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Okuyama, A., Kobayashi, M., Horiguchi, T. et al. A design based on final-state control for residual vibrationless seeking in hard disk drives. Microsyst Technol 11, 688–695 (2005). https://doi.org/10.1007/s00542-005-0553-1
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DOI: https://doi.org/10.1007/s00542-005-0553-1