Apparatus and method of removing disturbances during optical recording and/or reproducing

An apparatus to exclude a disturbance for use in a recording medium drive system which records and/or reproduces data with respect to a recording medium, the apparatus comprising:

• an actuator to change a position of a pickup, which transfer data on or from a track of the recording medium, in response to a combination compensation signal;
• an error detector to detect an error between the positions of the actuator and the recording medium when the actuator deviates from referenced upper, lower, right and left positions of the recording medium;
• a first compensator to receive the detected error and to output a next first compensation signal that allows the actuator to actuate the pickup along the recording medium in upper and lower directions, and right and left directions;
• and
• second compensation means for producing a next second compensation signal from which periodic disturbance has been rejected by combining previous first and second compensation signals, and filtering the combining result at a predetermined bandwith to be output as the next second compensation signal to be combined with the next first compensation signal to provide the combination compensation signal for use by the actuator to change the position of the pickup.

A method of excluding a disturbance while operating a recording medium drive system, the method comprising:

• detecting an error between a position of an actuator and referenced upper, lower, right and left positions of a recording medium when the recording medium drive system is operated;
• receiving the detected error and outputting a next first compensation signal which the actuator uses to actuate the pickup along the recording medium in upper and lower directions, or right and left directions;
• compensating for the detected error based on a modeling error of the actuator;
• combining the compensated error and previous first and second compensation signals to produce a combined result;
• filtering the combined result to a predetermined bandwidth;
• outputting a next second compensation signal from which a periodic disturbance, which is in the combined result, has been removed;
• and
• changing a position of the actuator according to a combination of the output next first compensation signal and the output next second compensation signal.

A method of excluding a disturbance occurring when operating a recording medium drive system, the method comprising:

• detecting an error between a position of an actuator and reference upper, lower, right and left positions of a recording medium when the recording medium drive system is operated;
• receiving the detected error and outputting a next first compensation signal that the actuator uses to actuate the pickup along the recording medium in upper and lower directions, and right and left directions;
• filtering a combination of a previous first compensation signal and a previous second compensation signal with a predetermined bandwidth, and outputting a next second compensation signal from which a disturbance, which is in the combined previous first and second compensation signals, has been removed;
• and
• changing a position of the actuator according to a combination of the output next first compensation signal and the output next second compensation signal.

A recording and/or reproducing apparatus to record and/or reproduce data with respect to a recording medium, comprising:

• a recording and/or reproducing head to transfer the data between the recording medium and the recording and/or reproducing apparatus;
• a sensor to detect a tracking and focus error from the recording medium and to output a tracking and focus error signal;
• an actuator to actuate the optical head using a corrected control signal;
• a controller to control the actuator by outputting a control signal, in accordance with an input of the tracking and focus error signal, to control the rotation of the spindle;
• and
• a disturbance correction unit to generate a correction signal, which corrects for a periodic disturbance not removed by the controller, by filtering the corrected control signal, with the corrected control signal being produced by combining the correction signal and the control signal,
• wherein the sensor, the controller, and the actuator form a closed tracking and focus feed back loop to which a vibration of the recording medium including the periodic disturbance is applied.

A computer readable medium encoded with processing instructions for implementing a method of excluding a disturbance occurring when operating a recording medium drive system performed by a processor in the recording medium drive system, the method comprising:

• detecting an error between a position of an actuator and reference upper, lower, right and left positions of a recording medium when the recording medium drive system is operated;
• receiving the detected error and outputting a next first compensation signal that the actuator uses to actuate the pickup along the recording medium in upper and lower directions, and right and left directions;
• filtering a combination of a previous first compensation signal and a previous second compensation signal with a predetermined bandwidth, and outputting a next second compensation signal from which a disturbance, which is in the previous combined first and second compensation signals, has been removed;
• and
• changing a position of the actuator according to a combination of the output next first compensation signal and the output next second compensation signal.