Spectral analysis of a position error signal
AssigneeSeagate Technology LLC
InventorsJeff Nelson, Farhad Navid, Richard Martin, Anton Viktorovich Goldade
Life of this patent
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Abstract
The present disclosure is directed to spectral analysis of a position error signal. In a particular embodiment, the method includes analyzing a spectral content of a position error signal. The method also includes comparing the spectral content to a threshold. Further, the method includes determining a result based on the comparing the spectral content to the threshold. In another particular embodiment, the spectral content of the position error signal is determined by performing a discrete fourier transform (DFT) on the error signal, determining a magnitude of the DFT output, and low pass filtering the magnitude.
Claims19
A method comprising:
- analyzing a spectral content of a position error signal;
- comparing the spectral content to a threshold;
- determining a result based on the comparing the spectral content to the threshold;
- and
- detecting contact between a transducer and a data storage medium based on the result, wherein analyzing the spectral content further comprises analyzing at least one magnitude of at least one frequency spectra of the position error signal and wherein the contact between the transducer and the data storage medium is detected when the result indicates the at least one magnitude is greater than the threshold.
A computer-readable medium having instructions for causing a processor to execute a method comprising:
- analyzing a spectral content of a position error signal;
- comparing the spectral content to a threshold;
- determining a result based on comparing the spectral content to the threshold;
- and
- detecting contact between a transducer and a data storage medium based on the result, wherein analyzing the spectral content further comprises analyzing at least one magnitude of at least one frequency spectra of the position error signal and wherein the contact between the transducer and the data storage medium is detected when the result indicates the at least one magnitude is greater than the threshold.
A device comprising:
- a buffer for storing position error samples;
- a processor programmed to
- analyze at least one magnitude of at least one frequency spectra of the position error samples;
- compare the at least one magnitude to a threshold;
- determine a result based on comparing the at least one magnitude to the threshold;
- and
- detect contact between a transducer and a data storage medium based on the result, wherein the contact between the transducer and the data storage medium is detected when the result indicates the at least one magnitude is greater than the threshold.
Dependencies are inferred from the claim text.