System and method for estimating a frequency of slider airbearing resonance

A method of estimating a value of a resonance frequency of an airbearing associated with a slider flying in proximity to a data storage medium, comprising:

• producing, using a readback signal obtained from the data storage medium over a plurality of complete airbearing periods, a discrete signal segment comprising a plurality of frequency transform components;
• computing a ratio of a magnitude of a first component to a magnitude of a second component at each of a plurality of sampling rates, the second component related to the resonance frequency of the airbearing;
• and
• estimating the value of the airbearing resonance frequency using a minimum of the ratios.

An apparatus for estimating a value of a resonance frequency of an airbearing, comprising:

• a data storage medium;
• a transducer provided on a slider and producing a readback signal obtained from the data storage medium;
• and
• a processor that receives the readback signal from the transducer and estimates the value of the airbearing resonance frequency using a Discrete Fourier Transform of the readback signal in accordance with Goertzel's algorithm.

An apparatus for estimating a value of a resonance frequency of an airbearing, comprising:

• a data storage medium;
• a transducer provided on a slider and producing a readback signal obtained from the data storage medium;
• and
• a processor that receives the readback signal from the transducer, the processor:
• producing, using the readback signal obtained from the data storage medium over a plurality of complete airbearing periods, a discrete signal segment comprising a plurality of frequency transform components;
• computing a ratio of a magnitude of a first component to a magnitude of a second component at each of a plurality of sampling rates, the second component related to the resonance frequency of the airbearing;
• and
• estimating the value of the airbearing resonance frequency using a minimum of the ratios.

A data storing system, comprising:

• a data storage disk;
• a transducer provided on a slider;
• an actuator for providing relative movement between the slider and the disk;
• and
• a processor that receives a readback signal from the transducer and estimates a value of the airbearing resonance frequency using a Discrete Fourier Transform of the readback signal in accordance with Goertzel's algorithm.

A data storing system, comprising:

• a data storage disk;
• a transducer provided on a slider;
• an actuator for providing relative movement between the slider and the disk;
• and
• a processor that receives a readback signal from the transducer, the processor:
• producing, using the readback signal obtained from the data storage disk over a plurality of complete airbearing periods, a discrete signal segment comprising a plurality of frequency transform components;
• computing a ratio of a magnitude of a first component to a magnitude of a second component at each of a plurality of sampling rates, the second component related to the resonance frequency of the airbearing;
• and
• estimating the value of the airbearing resonance frequency using a minimum of the ratios.