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AssigneeSeagate Technology LLC
InventorGabor Szita
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A compensation element (317) in a feedforward line in a dual stage control system for a data storage system compensates for the undesired transient motion of a first positioning element (i.e., a coarse actuator). The compensation element is a transfer function that is applied from the first positioning element's control signal (Uv) to a second positioning elements's (306) (i.e., microactuator's) input. The transfer function is defined as formula (I) where Vnom (z) is a transfer function model of the nominial portion of the first positioning element, Vres (z) is a transfer function model of the resonance portion of the first positioning element, and M(z) is a transfer function model of the dynamics of the second positioning element. This feedforward transfer function effectively cancels the resonances of the first positioning element without requiring the inversion of the resonance transfer function.
A data storage system, comprising:
A data storage system, comprising:
A controller (302) for a dual stage control system in a data storage system, wherein the controller (302) controls the positioning of a first positioning element and a second positioning element, and wherein the controller (302) includes a compensation element (317) that generates a compensation signal based on a control signal for the first positioning element and the compensation signal is input into the second positioning element to compensate for at least one resonance of the first positioning element.
A controller (302) for a dual stage control system in a data storage system, wherein the controller (302) controls the positioning of a coarse actuator (304) and a microactuator (306), and wherein the controller (302) generates a compensation signal based on a control signal for the coarse actuator (304) and the compensation signal is input into the microactuator (306) and compensates for at least one resonance of the coarse actuator (304).
A method for compensating for transient motion from a first positioning element in a dual stage control system for a data storage system, the method comprising:
A method for compensating for transient motion from a first positioning element in a dual stage control system for a data storage system, the method comprising:
Dependencies are inferred from the claim text.