Constant velocity servosystem wtih high positional accuracy

Details Constant velocity servosystem wtih high positional accuracy Constant velocity servosystem wtih high positional accuracy

1989-10-10

1991-01-29

Ip, Paul

Electricity: motive power systems

Positional servo systems

318561, 318608, 318594, 318632, 360 7706, 360 7716, G11B 2110

Patent

active

049889320

ABSTRACT:
The present servosystem positions a movable member such as an optical head over a rotating disk with a constant velocity and high positional accuracy by utilizing a fast analog feedback loop that is controlled by a slower digital loop. The analog feedback loop locks the speed of the movable member to the speed of the rotating disk in a spiral recording track. The progress of the movable member is constantly monitored with the digital loop. A velocity error of known magnitude and direction is introduced into the system. When the error exceeds a preset limit an error of the known magnitude but of the opposite direction is introduced. The servosystem thus zig-zags about the desired position with small velocity changes to provide a substantially constant velocity system with high positional accuracy.

REFERENCES:
patent: 3728607 (1973-04-01), Isak
patent: 3736485 (1973-05-01), Scarrott et al.
patent: 4200827 (1980-04-01), Oswald
patent: 4221995 (1980-09-01), Barkman
patent: 4282469 (1981-08-01), Moriyama
patent: 4296443 (1981-10-01), Sakamoto et al.
patent: 4312033 (1982-01-01), Sweeney et al.
patent: 4365324 (1982-12-01), Michaelis
patent: 4368412 (1983-01-01), Inoue
patent: 4386306 (1983-05-01), Nishimura et al.
patent: 4524397 (1985-06-01), Chalmers et al.
patent: 4613916 (1986-09-01), Johnson
patent: 4633423 (1986-12-01), Bailey
patent: 4669359 (1987-06-01), Shiba
patent: 4698569 (1987-10-01), Kimura et al.
patent: 4795955 (1989-01-01), Yamashita
patent: 4825137 (1989-04-01), Nakajima et al.
patent: 4835753 (1989-05-01), Yasuda
patent: 4855978 (1989-08-01), Kanamaru

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