Head positioning control system for information storage device

Abstract

Abstract PURPOSE:To improve the accuracy of positioning and to prevent off-track by detecting the vibration of an information storage device, executing feedback for a positioning system and reducing the positional dislocation of a head to the minimum even when the mechanical vibration occurs. CONSTITUTION:An acceleration detection means 6 detects acceleration in a seeking direction of the head 13 of an enclosure 16 housing a magnetic disk (an information recording medium) 10 and a positioning part (the magnetic head 13 and a voice coil motor 14) 15. A vibration follow-up control part 7 includes a low-pass filter 71 of which phase characteristic is flat in the aimed frequency band of the vibration and of which gain in high frequency band is small and generates a vibration follow-up signal DELTAS from the low frequency component of the detection output of the means 6. Then, a composition part 8 composites the positioning signal DELTAP of a positioning part 3 and the vibration follow-up signal DELTAS and controls a head moving part 14. Thus the positional dislocation of the track of the head 13 caused by the mechanical vibration can be reduced.

Inventors

• 👤 Masato Iwatsubo
• 👤 Toshibumi Hatagami
• 👤 Takaharu Ariga
• 👤 Yoshibumi Mizoshita

Bibliographic Details