Motor control device for information recording and reproducing a

Details Motor control device for information recording and reproducing a Motor control device for information recording and reproducing a

1996-03-29

1998-10-06

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 75, 360 7702, G11B 5596

Patent

active

058186514

ABSTRACT:
A motor control device of an information recording and reproducing apparatus has a disturbance observer for outputting a compensating voltage signal. The compensating voltage signal compensates for a drive voltage signal of a head-moving swing motor on the basis of the drive voltage signal and a detected signal from a velocity sensor detecting an angular velocity of the swing motor. In such a motor control device, amplitude of the drive voltage signal inputted into the disturbance observer is limited by a limiter not to exceed a maximum amplitude at which a driver of the motor generates a maximum drive signal for the motor within the drive ability of the driver. Therefore, even if an input signal to the motor is too great because the uncompensated drive voltage signal is excessive or external disturbance affects the swing motor, the amplitude of the signal inputted to the motor is limited. In other words, even if the input signal is too great, the compensating voltage signal is not affected. Consequently, the swing motor is not driven excessively and it is possible to precisely control relative movement and position of the head to a magnetic disk.

REFERENCES:
patent: 4860271 (1989-08-01), Yokogawa et al.
patent: 4862298 (1989-08-01), Genheimer et al.
patent: 5257255 (1993-10-01), Morimoto et al.
patent: 5299075 (1994-03-01), Hanks
patent: 5412809 (1995-05-01), Pam et al.
patent: 5426545 (1995-06-01), Sidman et al.
patent: 5521772 (1996-05-01), Lee et al.
patent: 5581521 (1996-12-01), Nomura et al.
Suminto, J. et al. "Piezoresistive Accelerometer and Method of Fabrication", WIPO International Publication No. WO 92/15018, Published Sep. 3, 1992.
K. Onishi "Control of Electric Motor and Robot", Journal of the Institute of the Electrical Engineers of Japan, vol. 110, No. 8, pp. 657-660, 1990.

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