Title :
Noise impact on servo TMR
Author_Institution :
Enabling Technol. Group, Maxtor Corp., Longmont, CO, USA
Abstract :
The servo system of a hard disk drive operates under a very hostile environment and it needs to be robust and fast enough to minimize the position error variance during track following. The design and evaluation of the servo system performance relies heavily on the position error signal (PES) that is produced from a demodulation circuit. The electronic/magnetic noise that contaminates the PES produces its own nonrepetitive runout (NRRO). Furthermore, this noise can deceive our assessment of NRRO. In this paper, we present a spectral analysis of noise and address the pertinent issues of concern
Keywords :
hard discs; noise; servomechanisms; spectral analysis; NRRO; PES; electronic noise; hard disk drive; magnetic noise; noise impact; nonrepetitive runout; position error signal; position error variance minimization; servo TMR; servo system performance; spectral analysis; track following; track misregistration; Circuit noise; Demodulation; Hard disks; Magnetic noise; Noise robustness; Servomechanisms; Signal design; Spectral analysis; System performance; Working environment noise;
Conference_Titel :
American Control Conference, 1997. Proceedings of the 1997
Conference_Location :
Albuquerque, NM
Print_ISBN :
0-7803-3832-4
DOI :
10.1109/ACC.1997.611989
