Apparatus and method of removing resonance frequency in system

A method of removing a resonance frequency of a system, the method comprising:

• generating an excitation signal to excite the system;
• applying the excitation signal to the system;
• detecting the resonance frequency from a response signal that is responsive to the excitation signal being applied to the system;
• and
• removing the detected resonance frequency.

A recording and/or reproducing apparatus to record and/or reproduce data with respect to a recording medium, comprising:

• a head to record and/or reproduce the data with respect to the recording medium;
• a driver to drive said head to record and/or reproduce the data with respect to the recording medium;
• a frequency generator to generate an excitation signal to excite the recording and/or reproducing apparatus at a selected frequency;
• a processor to process the data to be recorded and/or reproduced using said head, and to process a response signal related to the generated excitation signal;
• a resonance detector to analyze the processed response signal to determine whether the generated excitation signal corresponds to a resonance frequency;
• a programmable filter to filter the detected resonance frequency so as to prevent resonance in the recording and/or reproducing apparatus;
• a controller to control said frequency generator and said resonance detector to detect the resonance frequency, and to control said driver to drive said head.

A computer readable medium encoded with processing instructions for implementing a method of detecting a resonance frequency in a recording and/or reproducing apparatus as performed by a computer, the method comprising:

• generating an excitation signal of a frequency at or between a Nyquist frequency and a servo sampling frequency, where the servo sampling frequency corresponds to a servo control of a driver used to drive a head used to record and/or reproduce data with respect to a recording medium;
• applying the generated excitation signal to the head;
• detecting a response signal generated by the head in response to the applied excitation signal;
• and
• determining from the detected response signal whether the frequency of the generated and applied excitation signal corresponds to the resonance frequency for the driver.