Feedforward compensator for induced vibration
AssigneeSeagate Technology LLC
InventorsRaye Abdoulie Sosseh, John C. Morris
Life of this patent
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Abstract
A feedforward compensator for induced vibration is disclosed. Controlled motions in an actuator induce mechanical disturbances in a surrounding cabinet. The feedforward compensator allows such disturbances to be compensated for without the need of a vibration sensor. The compensator provides a feedforward compensation signal configured to compensate for a mechanical disturbance predicted to be induced by a controlled motion of the actuator, and applies the feedforward compensation signal to a signal that controls the motion of the actuator.
Claims19
A method comprising:
- providing a feedforward compensation signal configured to compensate for a mechanical disturbance predicted to be induced by a controlled motion of an actuator;
- applying the feedforward compensation signal to a signal that controls motion of the actuator;
- and
- using a testing mode to predict the mechanical disturbance predicted to be induced by the controlled motion of the actuator prior to providing a feedforward compensation signal, wherein the testing mode comprises exciting a mechanical disturbance by controlling the actuator to perform one or more motions, and measuring a position error signal of a transducer controllably connected to the actuator subsequent to the controlled motions of the actuator.
A method comprising:
- predicting a mechanical disturbance to be induced by a controlled motion of an actuator independently of a vibration sensor;
- providing a feedforward compensation signal configured to compensate for the mechanical disturbance predicted to be induced by the controlled motion of the actuator;
- and
- applying the feedforward compensation signal to a signal that controls motion of the actuator.
A method comprising:
- predicting a mechanical disturbance to be induced by a controlled motion of an actuator independently of a feedback signal;
- providing a feedforward compensation signal configured to compensate for the mechanical disturbance predicted to be induced by the controlled motion of the actuator;
- and
- applying the feedforward compensation signal to a signal that controls motion of the actuator.
An apparatus comprising:
- a servo controller, comprising a position input relating to a position of an actuator and a control signal output for controlling the position of the actuator;
- a compensator, comprising a position input, a feedforward current input, and a modified feedforward current output, wherein the compensator is configured to modify the feedforward current to compensate for a predicted vibration induced by a controlled motion of the actuator, wherein the modified feedforward current output and the control signal output are communicatively connected to provide a combined compensated control signal in communicative connection with a control input for an actuator.
An apparatus configured to receive an input feedforward current and modify the input feedforward current to provide a modified feedforward current to a control signal for a servo-controlled mechanism in a data storage system, wherein the modified feedforward current is produced independently of a vibration sensor and is configured to compensate for a previously predicted vibration induced by a controlled motion of the servo-controlled mechanism.
Dependencies are inferred from the claim text.