Magnetic recording disk file servo control system including an a

Details Magnetic recording disk file servo control system including an a Magnetic recording disk file servo control system including an a

1982-12-20

1986-03-11

McElheny, Jr., Donald

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 77, 318561, 318636, G11B 2108, G11B 2110

Patent

active

045757763

ABSTRACT:
A servo system for a magnetic disk file having a voice coil motor (VCM) actuator generates a position error signal (PES) from servo information recorded on one of the disks. An electrical model of the VCM is employed through which a measure of the VCM electrical current is passed to generate a simulated PES signal which is continuous even if the regular PES is sampled or intermittent.

REFERENCES:
patent: 4133011 (1979-01-01), Kurzweil
patent: 4297734 (1981-10-01), Laishley et al.
patent: 4477755 (1984-10-01), Rickert
IBM TDB, vol. 21, No. 5, "Offset Force Correction for Disk File", Mantey, Oct. 1978, pp. 1792-1795.
IBM Technical Disclosure Bulletin, vol. 21, No. 2, Jul. 1978--pp. 804-805, "Quad-Burst PES System for Disk File Servo"--Herrington & Mueller.

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