Method and apparatus for control of positioning

Details Method and apparatus for control of positioning Method and apparatus for control of positioning

1991-04-08

1992-11-17

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4435, 369 43, 369 32, 360 7805, 360 7806, 318592, G11B 7085

Patent

active

051649314

ABSTRACT:
Method and apparatus for control of positioning of a recording/playback head or other controlled object. When a controlled object reaches the vicinity of a target position, the control system is switched from operation as a velocity control system to operation as a position control system. By using state variables of the controlled object at that time, coefficients corresponding to the detected state variables are determined from characteristics of the controlled object which are determined in advance. By using the determined coefficient values, initial values upon start of position control of the position control system are set, and positioning control is then carried out.

REFERENCES:
patent: 4736353 (1988-04-01), Kasai et al.
patent: 5038333 (1991-08-01), Chow et al.
IBM Disk Storage Technology, Servo Design for an Eight-Inch Disk File, Robert D. Commander and J. R. Taylor, Feb., 1980, pp. 89-96.

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