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US 10,566,017 B2Granted
Actuator block having dual sensors for detecting vibration on magnetic disk device
AssigneesKabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage Corporation
InventorNorio Yoshikawa
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Abstract
According to one embodiment, a magnetic disk device includes an actuator assembly including an actuator block including a rotatable bearing unit, a plurality of heads movably supported by the actuator assembly, a first sensor provided to the actuator block, and a second sensor provided at a position different from the first sensor.
Claims10
A magnetic disk device comprising:
- an actuator assembly including an actuator block including a rotatable bearing unit;
- a plurality of heads movably supported by the actuator assembly;
- a first sensor provided to a side surface of the actuator block;
- and
- a second sensor provided at a position apart from the first sensor in a thickness direction in which the heads are aligned at an interval, wherein
- the first sensor is located, in the thickness direction, in a direction opposite to the second sensor with respect to a node of vibration of the actuator assembly configured to vibrate due to a disturbance.
3 more elements
A magnetic disk device comprising:
- an actuator assembly including an actuator block including a rotatable bearing unit;
- a plurality of heads movably supported by the actuator assembly;
- a first sensor provided to a side surface of the actuator block;
- and
- a second sensor provided at a position apart from the first sensor in a thickness direction in which the heads are aligned at an interval, wherein
- the first sensor is located at a first end portion of the side surface in the thickness direction,
- the second sensor is located at a second end portion on a side opposite to the first end portion of the side surface in the thickness direction.
4 more elements
A magnetic disk device comprising:
- an actuator assembly including an actuator block including a rotatable bearing unit;
- a plurality of heads movably supported by the actuator assembly;
- a first sensor provided to a side surface of the actuator block;
- a second sensor provided at a position apart from the first sensor in a thickness direction in which the heads are aligned at an interval;
- a voice coil motor configured to control an operation of the actuator assembly;
- a microactuator configured to finely control operations of the heads;
- and
- a controller configured to control the voice coil motor and the microactuator,
- wherein the controller is configured to calculate a third acceleration of the heads based on a first acceleration detected by the first sensor and a second acceleration detected by the second sensor, and control the microactuator based on the third acceleration.
6 more elements
Dependencies are inferred from the claim text.