OPTICAL DISK DRIVE STORAGE SYSTEM, METHOD FOR CONTROLLING MOVEMENT OF OPTICAL LEAD HEAD, AND SLIDING MODE CONTROLLER

• Main Authors: ROMANO PAUL M, REIFF FRANCIS H, SUPINO LOUIS
• Format: Patent
• Language: English
• Published: 08.01.2009
• Subjects: CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

PROBLEM TO BE SOLVED: To provide an optical disk drive servo control system in which sensitivity to a change in parameter is not so high, and transition can be controlled more favorably and the implementing cost of a complex adaptive linear controller is eliminated. SOLUTION: The optical disk storage system is provided with a sliding mode controller for actuating an optical lead head assembly on an optical disk during focus capturing, focus tracking, track seeking and centerline tracking. The sliding mode controller operates by switching feedback between a positive state and a negative state so as to follow a predetermined phase state track by allocating a certain phase state (e.g., position error or speed of the lead head). COPYRIGHT: (C)2009,JPO&INPIT