Winding – tensioning – or guiding – Unwinding and rewinding a machine convertible information... – Carrier speed or tension control
Patent
1996-01-26
1997-12-02
Darling, John P.
Winding, tensioning, or guiding
Unwinding and rewinding a machine convertible information...
Carrier speed or tension control
2423522, G11B 1543
Patent
active
056926944
ABSTRACT:
A method and apparatus for implementing servo control in a video cassette recorder (VCR) including reel motors. According to the invention, the VCR is controlled so that a control equation ##EQU1## is satisfied. Also, the tension of a tape is directly detected to actively control a take-up reel motor so that a force F.sub.t reflecting a tension in the tape on the take-up reel motor side of the VCR and a force F.sub.s ' reflecting a tension in the tape on a supply reel side of the VCR equal each other, the two forces F.sub.t ' and F.sub.2 ' being centered on a capstan motor. In addition, a servo system of the VCR is designed so that a term ##EQU2## of the control equation is minimized. If the servo system is controlled to satisfy the control equation, a motional equation of the capstan motor is simplified to the following equation ##EQU3## in which ##EQU4## is very small to decrease a torque T.sub.c applied to the capstan motor.
REFERENCES:
patent: 3892038 (1975-07-01), Studer
patent: 4341363 (1982-07-01), Inatome
patent: 4731679 (1988-03-01), O'Gwynn et al.
patent: 4786992 (1988-11-01), Tajima et al.
patent: 5039027 (1991-08-01), Yanagihara et al.
patent: 5125592 (1992-06-01), Sato
patent: 5138504 (1992-08-01), Nishijima et al.
patent: 5248112 (1993-09-01), Rodal et al.
patent: 5540398 (1996-07-01), Nishida et al.
Kim Chang-hwan
Yang Seok-kyun
Darling John P.
Samsung Electronics Co,. Ltd.
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