Apparatus, system, and method for detection of fly height margin using controlled excitation of air bearing mode

A system for fly height detection using controlled excitation of air bearing mode, the system comprising:

• a disk configured to record data, the disk having a surface comprising physical asperities;
• a head gimbal assembly configured to calibrate a fly height margin for the disk, the head gimbal assembly comprising a glide head coupled to a suspension arm;
• an actuator coupled with a first end of the suspension arm and configured to induce oscillating vibrations in the glide head, the actuator further configured to continuously increase a peak to peak amplitude of the oscillating vibrations of the glide head until the glide head contacts at least one physical asperity;
• the glide head configured to detect physical asperities on the disk surface, the glide head coupled with a second end of the suspension arm;
• and
• a sensor module configured to communicate with a control module in response to the glide head coming in contact with the at least one physical asperity.

A computer program product comprising a computer useable medium having a computer readable program, wherein the computer readable program when executed on a computer causes the computer to:

• induce oscillating vibrations in a glide head, wherein an actuator coupled with a first end of a suspension arm is configured to induce the oscillating vibrations in the glide head and the glide head is coupled with a second end of the suspension arm;
• continuously increase a peak to peak amplitude of the oscillating vibrations of the glide head until the glide head contacts at least one physical asperity;
• detect physical asperities on a disk surface;
• and
• communicate with a control module in response to the glide head coming in contact with the at least one physical asperity.

A method for fly height detection using controlled excitation of air bearing mode, the method comprising:

• inducing oscillating vibrations in a glide head, wherein an actuator coupled with a first end of a suspension arm is configured to induce the oscillating vibrations in the glide head and the glide head is coupled with a second end of the suspension arm;
• continuously increasing a peak to peak amplitude of the oscillating vibrations of the glide head until the glide head contacts at least one physical asperity;
• detecting physical asperities on a disk surface;
• and
• communicating with a control module in response to the glide head coming in contact with the at least one physical asperity.

An apparatus for fly height detection using controlled excitation of air bearing mode, the apparatus comprising:

• means for inducing vibrations in a glide head, wherein an actuator coupled with a first end of a suspension arm is configured to induce the oscillating vibrations in the glide head and the glide head is coupled with a second end of the suspension arm;
• means for continuously increasing a peak to peak amplitude of the oscillating vibrations of the glide head until the glide head contacts at least one physical asperity;
• means for detecting physical asperities on a disk surface;
• and
• means for communicating with a control module in response to the glide head coming in contact with the at least one physical asperity.