DocumentCode :
2356120
Title :
Comparison of the control performance for the following control system in HDDs
Author :
Kawafuku, Motohiro ; Takamori, Jun ; Iwasaki, Makoto ; Hirai, Hiromu
Author_Institution :
Dept. of Electr. & Comput. Eng., Nagoya Inst. of Technol., Nagoya, Japan
fYear :
2010
fDate :
21-24 March 2010
Firstpage :
548
Lastpage :
553
Abstract :
HDDs are necessary as an information storage equipment of the information technology devices. Since the application of HDDs expands by adjusting the digitization, the requirement for miniaturization and capacity enlargement of HDDs heighten. The areal density is defined as a multiplication of track density and linear density. With rapid increase in areal density, the head positioning servo controller must be precisely performed on the desired track against various disturbances caused by the dynamics of mechanical systems in track-following mode. In the track-following mode, the non-circular track path and the eccentricity of the spindle will cause RRO, and the disk vibration and pivot friction that is one of a force disturbance will cause the non-repeatable run-out (NRRO). Varied models have been proposed to represent the dynamic behavior of pivot friction. The authors propose a precise following control technique that is suppressing the effect of pivot friction by using high precision friction model. The paper compares the control performance with a proposed method and a conventional method such as a disturbance observer. The effectiveness of the proposal technique was verified by using HDDs head positioning control system.
Keywords :
disc drives; force control; hard discs; observers; position control; servomechanisms; vibration control; HDD head positioning control system; areal density; disk vibration; disturbance observer; following control technique; force disturbance; hard disc drives; head positioning servo controller; high precision friction model; information storage equipment; noncircular track path; nonrepeatable run-out; pivot friction; spindle eccentricity; track-following mode; Conferences; Control systems; Digital signal processing; Frequency; Friction; Information technology; Magnetic heads; Magnetic hysteresis; Motion control; Optical control;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Advanced Motion Control, 2010 11th IEEE International Workshop on
Conference_Location :
Nagaoka, Niigata
ISSN :
1943-6572
Print_ISBN :
978-1-4244-6668-9
Electronic_ISBN :
1943-6572
Type :
conf
DOI :
10.1109/AMC.2010.5464071
Filename :
5464071
Link To Document :
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