Title :
HDD servo loop gain calibration based on MRA method
Author :
Fu-Cai Wang ; Jia, Q.-W. ; Song-Qin Gong
Author_Institution :
Dept. of Phys., Yantai Normal Univ.
Abstract :
An automatic gain calibration method based on model reference adaptation for HDD servo is presented. Variations in VCM gain may cause variations in servo control stability margins and thus need to be compensated. The traditional model reference adaptive method is modified in this paper to generate the compensation gain adaptively. Experimental results show that after the compensation, the DC gain of the open-loop responses can be maintained nearly constant despite the variations in head position and operating temperature
Keywords :
calibration; disc drives; hard discs; magnetic heads; model reference adaptive control systems; servomechanisms; DC gain; HDD servo loop gain calibration; automatic gain calibration method; head position; model reference adaptation; open-loop responses; operating temperature; servo control stability; voice coil motor gain; Adaptive control; Calibration; Frequency; Magnetic heads; Programmable control; Resonance; Servomechanisms; Servosystems; Stability; Temperature;
Conference_Titel :
Asia-Pacific Magnetic Recording Conference, 2004. APMRC 2004
Conference_Location :
Seoul
Print_ISBN :
0-7803-8717-1
DOI :
10.1109/APMRC.2004.1521974
