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AssigneeInternational Business Machines Corporation
InventorsNhan Xuan Bui, John Alexander Koski, Akimitsu Sasaki, Kazuhiro Tsuruta
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A servo system and method position a head laterally with respect to defined servo tracks, employing fine and coarse actuators. A servo control integrates the position error between the head and a desired position in accordance with a predetermined function, and operates the coarse actuator to translate the fine actuator and the head in accordance with the integrated position error. A position error signal loop is coupled to a servo sensor for determining position error for operating the fine actuator to translate the head in a manner to reduce the position error. The position error signal loop may have a compensator function with both integration and other functions. A coarse servo control comprises a connection coupled to the compensator function for providing an integration control representing the integration function of the position error signal loop; and a driver coupled to the connection, operating the coarse actuator to translate the fine actuator and the head in accordance with the integration signal.
In a servo system for positioning a head laterally, said servo system comprising a servo sensor for sensing lateral position of said head with respect to defined servo tracks, a fine actuator for translating said head laterally with respect to said defined servo tracks, a coarse actuator for translating said fine actuator laterally with respect to said defined servo tracks, and a position error signal loop coupled to said servo sensor for determining position error between said head and a desired position related to said defined servo tracks, for operating said fine actuator to translate said head in a manner to reduce said determined position error, said position error signal loop having a compensator function with both integration and other transfer functions, a method for operating said coarse actuator, comprising:
In a servo system for positioning a head laterally, said servo system comprising a servo sensor for sensing lateral position of said head with respect to defined servo tracks, a fine actuator for translating said head laterally with respect to said defined servo tracks, and a coarse actuator for translating said fine actuator laterally with respect to said defined servo tracks, a method for operating said coarse actuator, comprising:
A servo system for positioning a head laterally with respect to defined servo tracks, comprising:
A data storage system, comprising:
In a servo system for positioning a head laterally, said servo system comprising a servo sensor for sensing lateral position of said head with respect to defined servo tracks, a fine actuator for translating said head laterally with respect to said defined servo tracks, a coarse actuator for translating said fine actuator laterally with respect to said defined servo tracks, and a position error signal loop coupled to said servo sensor for determining position error between said head and a desired position related to said defined servo tracks, for operating said fine actuator to translate said head in a manner to reduce said determined position error, said position error signal loop having a compensator function with both integration and other transfer functions, a coarse servo control for operating said coarse actuator, comprising:
Dependencies are inferred from the claim text.