Title :
PES reduction in magnetic disk drives via a low-TMR HGA and servo loop shaping
Author :
Kim, Young-Hun ; Dong-Ho Oh ; Ho Seong Lee
Author_Institution :
Storage Div., Samsung Electron., San Jose, CA
Abstract :
This paper presents a servo-mechanically combined strategy to reduce the position error signal (PES) in magnetic disk drives. A special head-gimbal assembly (HGA) is used to reduce the disk vibration-induced disturbance. Then a further reduction is attempted by means of servo loop shaping based on empirical knowledge on frequency-domain properties of the disturbance. The efficacy of the proposed strategy is demonstrated by experiments using actual sample disk drives
Keywords :
disc drives; magnetic disc storage; magnetic heads; servomechanisms; vibration control; disk vibration-induced disturbance reduction; frequency-domain property; head-gimbal assembly; magnetic disk drive; position error signal reduction; servo loop shaping; servo-mechanically combined strategy; track misregistration; Assembly; Density measurement; Design optimization; Disk drives; Frequency; Magnetic heads; Magnetic properties; Position measurement; Servomechanisms; Tracking loops;
Conference_Titel :
Asia-Pacific Magnetic Recording Conference, 2004. APMRC 2004
Conference_Location :
Seoul
Print_ISBN :
0-7803-8717-1
DOI :
10.1109/APMRC.2004.1521945
