Reaction mass dual-stage actuator (DSA) and sensor
AssigneeSamsung Electronics Co., Ltd.
InventorsDan Blick, Seong-Woo Kang
Life of this patent
Estimating the term…
Abstract
A hard disk drive that has a reaction mass and a transducer that can be used to move and/or sense the acceleration of an actuator arm of the drive. The transducer is coupled to a disk controller that can provide output signals which induce a movement of the reaction mass. Movement of the reaction mass will cause a responsive movement of a head(s) coupled to the actuator arm. The transducer can also provide input signals to the controller that correspond to an acceleration of the actuator arm. The acceleration signal can provide force feedback for a servo system of the drive.
Claims24
An actuator arm assembly for a hard disk drive, comprising:
- an actuator arm;
- a reaction mass coupled to said actuator arm;
- and,
- a transducer coupled to said actuator arm and said reaction mass.
A hard disk drive, comprising:
- a base plate;
- a spindle motor coupled to said base plate;
- a disk coupled to said spindle motor;
- an actuator arm mounted to said base plate;
- a voice coil motor coupled to said actuator arm;
- a flexure beam coupled to said actuator arm;
- a head coupled to said flexure beam and said disk;
- a reaction mass coupled to said actuator arm;
- a transducer coupled to said reaction mass and said actuator arm;
- and,
- a controller coupled to said head, said voice coil motor and said transducer.
A hard disk drive, comprising:
- a base plate;
- a spindle motor coupled to said base plate;
- a disk coupled to said spindle motor;
- an actuator arm mounted to said base plate;
- a voice coil motor coupled to said actuator arm;
- a flexure beam coupled to said actuator arm;
- a head coupled to said flexure beam and said disk;
- actuator means for moving said actuator arm and said head;
- and
- a controller coupled to said head, said voice coil motor and said actuator means.
A hard disk drive, comprising:
- a base plate;
- a spindle motor coupled to said base plate;
- a disk coupled to said spindle motor;
- an actuator arm mounted to said base plate;
- a voice coil motor coupled to said actuator arm;
- a flexure beam coupled to said actuator arm;
- a head coupled to said flexure beam and said disk;
- sensor means for sensing an acceleration of said actuator arm;
- a controller coupled to said head, said voice coil motor and said sensing means.
A method for moving a head in a hard disk drive, comprising:
- transmitting an output signal to a transducer to induce movement of a reaction mass coupled to an actuator arm that is coupled to a head.
A method for sensing acceleration of an actuator arm of a hard disk drive, comprising:
- transmitting an input signal from a transducer coupled to a reaction mass and an actuator arm that is coupled to a head.
A method for generating a signal for a voice coil motor, comprising;
- summing a desired signal with an actual signal to generate a first summed signal;
- receiving an acceleration signal from a transducer that is coupled to an actuator arm and a reaction mass;
- summing the first summed signal with the acceleration signal to create a second summed signal.
Dependencies are inferred from the claim text.