Velocity control unit of detecting head

Details Velocity control unit of detecting head Velocity control unit of detecting head

1988-04-01

1989-05-02

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

Adaptive or optimizing systems including 'bang-bang' servos

318628, 318696, 318685, 360 7806, G05B 1300

Patent

active

048272000

ABSTRACT:
A velocity control unit of a detecting head consists of a differentiation circuit for differentiating a reference velocity signal and feeding it via an analog switch to a first-order lag circuit which generates a feedforward signal. The analog switch is controlled by a constant velocity/deceleration detecting circuit so that it may be turned on in the constant velocity/deceleration period of the head.

REFERENCES:
patent: 4133011 (1979-01-01), Kurzweil, jr.
patent: 4200827 (1980-04-01), Oswald
patent: 4337428 (1982-06-01), Oltendorf
patent: 4469996 (1984-09-01), Oltendorf
patent: 4535372 (1985-08-01), Yeaklez
patent: 4594622 (1986-06-01), Wallis
R. K. Oswald, "Design of a Disk File Head-Positioning Servo," IBM J. Res. Develop., pp. 506-512, Nov. 1976.

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