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Robust H control with multiple constraints for the track-following system of an optical disk drive

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4 Author(s)
Moon-Noh Lee ; Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea ; Jung-Ho Moon ; Kyoung Bog Jin ; Myung Jin Chung

In this paper, the authors design a tracking controller which satisfies transient response specifications and maintains tracking error within a tolerable limit for the uncertain track-following system of an optical disk drive. To this end, a robust H control problem, with regional stability constraints and sinusoidal disturbance rejection is considered. The internal model principle is used for rejecting the sinusoidal disturbance caused by eccentric rotation of the disk. The authors show that a condition satisfying the regional stability constraints can be expressed in terms of a linear matrix inequality (LMI) using the Lyapunov theory and S-procedure. Finally, a tracking controller is obtained by solving an LMI optimization problem involving two LMIs. The proposed controller design method is evaluated through an experiment

Published in:

Industrial Electronics, IEEE Transactions on  (Volume:45 ,  Issue: 4 )

Date of Publication:

Aug 1998

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