ハードディスク装置の機構共振制振サーボ技術(機械力学,計測,自動制御)

概要

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Regarding the control of head positioning in hard disk drives, one of the barriers to achieve high positioning accuracy is the effect of the vibrations from the several mechanical resonant modes of the actuator. Thc resonances of high order modes are regarded as uncertainty, so that the conventional control system cannot reduce vibrations caused by high-order resonant modes. In this study, our purpose was to design the control system that can suppress the vibration from high-order resonant modes. The proposed method can do this by designing both the controller and the structure simultaneously using vector locus of open-loop characteristics. The experimental results from application of this method to actual hard disk drives are presented. The measured data show that positioning accuracy at high-order resonant modes can be greatly improved by proposed method.
社団法人日本機械学会の論文
2002-11-25