Head-disc interface (HDI) modal response monitoring
AssigneeSeagate Technology LLC
InventorsAntanas Daugela, Subra Nagarajan, Jason W. Riddering, Neal F. Gunderson, John S. Wright, Stefan A. Ionescu, Rick P. Freeman, Erick J. Lindquist, Andrew R. Motzko, Zine Eddine Boutaghou
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Abstract
Apparatus and method for head-disc interface (HDI) modal response monitoring. A sensing element disposed on a rigid actuator arm is mechanically impedance matched to a head-disc interface (HDI) supported by the actuator arm to resonate at a predetermined frequency corresponding to at least one disturbance associated with the HDI.
Claims20
An apparatus comprising a sensing element disposed on a rigid actuator arm, the sensing element having a mechanical impedance which matches a mechanical impedance of a head-disc interface (HDI) supported by the actuator arm to resonate at a predetermined frequency corresponding to at least one disturbance associated with the HDI.
A storage device comprising:
- a rigid actuator arm which supports a transducer adjacent a storage surface to form a head-disc interface (HDI);
- and
- a sensing element rigidly coupled to the actuator arm, the sensing element having a mechanical impedance selected to match a mechanical impedance of the HDI to detect a disturbance associated with the HDI propagated through the actuator arm.
A method comprising:
- coupling a sensing element to a rigid actuator arm of a storage device, the sensing element having a mechanical impedance selected to match a mechanical impedance of a head-disc interface (HDI) supported by the actuator arm so as to resonate at a predetermined frequency corresponding to at least one disturbance associated with the HDI;
- and
- detecting a selected one of the said at least one disturbance in relation to an output of the sensing element.
Dependencies are inferred from the claim text.