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Device and method for compensating disturbance and its driving servo system

A technology of servo system and playback device, which is applied to the configuration/installation of the head, drive/movement of the recording head, recording/reproduction with optical methods, etc., which can solve the problems of difficult periodic changes

Inactive Publication Date: 2002-03-20
SAMSUNG ELECTRONICS CO LTD
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  • Description
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Problems solved by technology

but, Figure 4 The system only considers disturbances of special frequency components, not all frequency components that actually exist within the control range of the disk drive system, and it is difficult to overcome periodic changes such as speed multiplier changes

Method used

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  • Device and method for compensating disturbance and its driving servo system
  • Device and method for compensating disturbance and its driving servo system
  • Device and method for compensating disturbance and its driving servo system

Examples

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Embodiment Construction

[0036] refer to Figure 5 The optical recording medium drive servo system of the optical recording / reproducing apparatus according to the present invention includes: an actuator 500, an error detector 510, a compensator 520, a first memory 530, a second memory 540, and an adder 560.

[0037] The actuator 500 moves the position of a head (for example, a pickup head) for recording data on or reproducing data from the optical recording medium. The error detector 510 detects the difference between the reference position on the recording medium and the actual position of the head. The compensator 520 receives the output of the error detector 510 and generates an actuator drive value by applying a predetermined algorithm for reducing the position error. The first memory 530 stores control inputs for compensating for periodic position errors due to, for example, eccentricity of the optical recording medium, made by the actuator 500 . The first memory 530 repeats the update of the v...

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Abstract

An apparatus and method of compensating for disturbances using learning control is provided. An optical recording medium drive servo system of an optical recording / reproducing apparatus, the system including an actuator for moving the position of a head for recording data on a recording medium or reproducing the recorded data from the recording medium, an error detector for detecting the difference between the reference position on the recording medium and the actual position of the head; a compensator for receiving a value from the error detector and producing a value for driving the actuator, a first memory for storing a control input for compensating for the position error of the actuator due to a periodic disturbance such as eccentricity, a second memory for converting the content of the first memory according to phase and storing the converted content, a timing controller for generating addresses for the first memory and addresses for the second memory according to phase, and an adder for applying the content of the first or second memory together with the output of the compensator to the actuator. Accordingly, a periodic disturbance component can be rapidly and effectively compensated for using a previously-learned control result regardless of a variation.

Description

technical field [0001] The present invention relates to compensation of disturbances in optical recording / reproducing apparatuses, and more particularly, to an apparatus and method for compensating disturbances using learning control in optical recording and reproducing apparatuses, such optical recording / reproducing apparatuses Compensating for periodic disturbances such as eccentricity present in the optical disk drive system by performing feedforward control using a method of iterative learning, memorizing the results of the feedforward control, and applying the results of the feedforward control to compensate disturbances generated later, and The method also relates to an optical recording medium drive servo system using the device and method. Background technique [0002] figure 1 An example of a tracking error signal due to eccentricity of an optical recording medium is shown. Eccentricity in an optical recording medium occurs because the rotation axis of the rotatin...

Claims

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Application Information

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IPC IPC(8): G11B21/10G11B7/095G11B19/02
CPCG11B7/0953G11B19/02
Inventor 赵诚一徐仲彦全镇勋郑守烈
Owner SAMSUNG ELECTRONICS CO LTD
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