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2011•IEEE Transactions on Industrial ElectronicsRequires access

Optimization of Head-Positioning Control in a Hard Disk Drive Using the RBode Plot

Takenori Atsumi, William C. MESSNER

Open publisher page 46 citations

Abstract

We have developed a user-friendly loop-shaping method employing the Robust Bode (RBode) plot for optimizing the head-positioning system in a hard disk drive (HDD). The RBode plot represents the robust performance criterion as allowable and forbidden regions on the open-loop Bode plot. Using the RBode plot, control engineers can easily design controllers that suppress disturbances and account for perturbations of the controlled object with frequency response data alone. There is no need to construct the transfer function models of the controlled object and of the disturbance. Experimental results for a track-following control in an HDD show the utility of the method.

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What this paper is about

We have developed a user-friendly loop-shaping method employing the Robust Bode (RBode) plot for optimizing the head-positioning system in a hard disk drive (HDD). The RBode plot represents the robust performance criterion as allowable and forbidden regions on the open-loop Bode plot. Using the RBode plot, control engineers can easily design controllers that suppress disturbances and account for perturbations of the controlled object with frequency response data alone. There is no need to construct the transfer function models of the controlled object and of the disturbance. Experimental results for a track-following control in an HDD show the utility of the method.

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OpenAlex reports 46 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

We have developed a user-friendly loop-shaping method employing the Robust Bode (RBode) plot for optimizing the head-positioning system in a hard disk drive (HDD). The RBode plot represents the robust performance criterion as allowable and forbidden regions on the open-loop Bode plot. Using the RBode plot, control engineers can easily design controllers that suppress disturbances and account for perturbations of the controlled object with frequency response data alone. There is no need to construct the transfer function models of the controlled object and of the disturbance. Experimental results for a track-following control in an HDD show the utility of the method.

Key concepts: Bode plot, Plot (graphics), Transfer function, Control theory (sociology), Computer science, Head (geology), Control system, Frequency response

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