Electricity: motive power systems – Positional servo systems – Adaptive or optimizing systems including 'bang-bang' servos
Patent
1986-10-14
1988-02-09
Dobeck, Benjamin
Electricity: motive power systems
Positional servo systems
Adaptive or optimizing systems including 'bang-bang' servos
318632, 318687, 360 78, G05B 1300
Patent
active
047243708
ABSTRACT:
A servo system intermittently samples servo sectors from a data disk to obtain the position of the read/write head and to maintain an on-track alignment. A glass scale measures the movement of the transducer head and provides a velocity signal. An integrator integrates the velocity signal to produce a fill-in position signal. This fill-in position signal is added to the position signal from the last sampled servo sector to provide a position compensator with position information when the head is in between servo sectors. An on-track detector circuit and a damping circuit heavily damp movement of the transducer head when the head is in the on-track position. A gain circuit modifies the signal going to the position compensator in order to compensate for misclamping and imperfections in the data disk. The position compensator includes a tilt circuit which compensates for tilting of the disk drive from a non-horizontal position.
REFERENCES:
patent: 3854081 (1974-12-01), Benaglio
patent: 4031443 (1977-06-01), Droux
patent: 4090112 (1978-07-01), Klinger
patent: 4135217 (1979-01-01), Jacques et al.
patent: 4357566 (1982-11-01), DuVall
patent: 4379256 (1983-04-01), Maury
patent: 4412165 (1983-10-01), Case et al.
patent: 4562562 (1985-12-01), Moriya et al.
Cheng Kechen
Moraru Alex
Dobeck Benjamin
Konishiroku Photo Industries Co., Ltd.
Schatzel Thomas E.
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