Object positioning using discrete sliding mode control with variable parameters
July 29, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesHard disc drive with improved servo system Disc drive with improved data transfer management apparatus Method and apparatus for adaptive control Method of controlling a servomotor Adaptive sliding mode control method for object of control including spring system Control system for positioning head in disk device by estimating and correcting actuator parameters based on head position and actuator drive current obtained by vibrating the head Positioning control system Disk drive with adaptive positioning Digital sector servo incorporating repeatable run out tracking Digital servo control system for use in disk drives, including sample integrity tester for reducing effects of spurious sampled position values InventorsApplicationNo. 902566 filed on 07/29/1997US Classes:360/75, Controlling the head360/77.02, Rotary carrier360/78.09Including model of servo system or elementExaminersPrimary: Psitos, Aristotelis M.Assistant: Habermehl, James L Attorney, Agent or FirmInternational ClassesG11B 005/596G11B 005/55 AbstractApparatus and method for improving vibration and mechanical shock response of a system through the use of discrete-time sliding mode control with variable parameters are disclosed. A servo circuit for positioning a control object (such as a head of a disc drive) includes a reference generator generating position and velocity references, an observer generating position and velocity estimates, and circuitry for determining position and velocity errors therefrom. Variable position and velocity gains are applied to the position and velocity errors, respectively, the position and velocity gains varying with respect to at least the magnitudes of the position errors. | |
