SECTOR SERVO SEEK CONTROL

PCT No. PCT/US82/00657 Sec. 371 Date Aug. 16, 1982 Sec. 102(e) Date Aug. 16, 1982 PCT Filed May 17, 1982 PCT Pub. No. WO83/04133 PCT Pub. Date Nov. 24, 1983.A sector servo seek control samples each sector to obtain sector time, the track identification within a sequence of track types and a position...

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Hauptverfasser:	AXMEAR, FREDERICK EUGENE, SAXMAN, JOHN HUMPHREY, SIVERLING, MICHAEL MCHUGH, BAXTER, DUANE WILLARD
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CONTROLLING INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS REGULATING SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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Zusammenfassung:	PCT No. PCT/US82/00657 Sec. 371 Date Aug. 16, 1982 Sec. 102(e) Date Aug. 16, 1982 PCT Filed May 17, 1982 PCT Pub. No. WO83/04133 PCT Pub. Date Nov. 24, 1983.A sector servo seek control samples each sector to obtain sector time, the track identification within a sequence of track types and a position error signal for a track location to track location seek. The device during each sector determines the actual transducer track location and the next sector projected track location with respect to the sequence of track types. The projected track location is corrected using the error signal to find the actual location, but if a sector signal is missing or erroneous, the projected location is used as the actual location, permitting a composite correction to be made when a correct sector signal is obtained. The seek time is minimized by using maximum acceleration followed by maximum deceleration while not exceeding a velocity value that would cause the device to overshoot the target track using full deceleration.