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US 8,027,119 B2Granted
Vibration detection and compensation filter
AssigneeSeagate Technology LLC
InventorTao Zhang
Life of this patent
Estimating the term…
Abstract
The application relates to an adaptive vibration damping scheme that provides for detection of, and adjustment for, vibration-related disturbances in devices. The vibration damping scheme utilizes a common filter function to implement vibration detection and vibration compensation.
Claims19
An apparatus comprising:
- a single filter configured to detect vibration represented in a position error signal (PES) by directly filtering the PES and to provide an output indicative of the detected vibration to an adaptive vibration compensation component,
- wherein the adaptive vibration compensation component, in response to receiving the output indicative of the detected vibration, utilizes the same single filter to generate a compensation signal for the detected vibration.
A method comprising:
- detecting, using a filter function, vibration represented in a position error signal (PES) by directly filtering the PES;
- providing an output indicative of the detected vibration in the PES;
- compensating for the detected vibration by, in response to receiving the output indicative of the detected vibration in the PES, generating a compensation signal for the detected vibration using the same filter function and by adjusting a compensation gain.
A servo loop comprising:
- a vibration detection component without any physical sensor;
- and
- an adaptive vibration compensation component;
- wherein the vibration detection component and the vibration compensation component utilize a same filter function that is applied within the vibration detection component to detect vibration in a position error signal (PES) by directly filtering the PES and to provide a vibration detection output, and is also applied within the vibration compensation component to compensate for the detected vibration by generating a compensation signal for the detected vibration in response to receiving the vibration detection output.
1 more element
Dependencies are inferred from the claim text.