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Long-distance trace seeking and control method for CD driver and related system structure

A control system and optical drive technology, applied in the direction of optical recording/reproduction, driving/moving the recording head, recording information on the disk, etc., can solve the problems of long-distance tracking control and achieve the effect of improving the control ability

Inactive Publication Date: 2007-05-23
MEDIATEK HEFEI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is sometimes not the best practice to use a fixed method to generate the required speed profile
In addition, in the prior art system, only the sensed speed (and sometimes the sensed remaining track number) is used as the information required for feedback control, but sometimes such simple feedback control is not enough Accurate long-distance tracking control

Method used

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  • Long-distance trace seeking and control method for CD driver and related system structure
  • Long-distance trace seeking and control method for CD driver and related system structure
  • Long-distance trace seeking and control method for CD driver and related system structure

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Embodiment Construction

[0028] Please refer to FIG. 3 . FIG. 3 is a schematic diagram of a preferred embodiment of the long-distance tracking control system of the present invention. The long-range tracking control system 300 includes: a radial actuator 320, a read head (not shown in the figure) is arranged on the radial actuator 320, and the radial actuator 320 can be driven according to a driving voltage U moves the location of the read head. A track number sensor 330 is used to calculate a remaining track number T; a speed sensor 340 is used to calculate a sensing velocity V of the read head; an acceleration sensor 350 is used to calculate a sensing speed V of the read head Acceleration A; and a controller 310, used to determine the value of the driving voltage U according to the target moving track number, the remaining track number T, the sensing speed V, and the sensing acceleration A, so as to control the movement of the read head speed.

[0029] The main difference from the prior art is tha...

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Abstract

The control method for long distance tracking is used in CD driver including one radial actuator, one reading head set on the radial actuator to read data stored in the CD, and one controller for controlling the radial actuator to shift the reading head during long distance tracking stage. The control method includes the following steps: calculating remainder track number, calculating the sensing speed of the reading head, calculating the sensing acceleration of the reading head, and controlling the shift speed of the reading head with the controller based on the remainder track number, the sensing speed and the sensing acceleration.

Description

technical field [0001] The present invention relates to a long-range tracking control method, in particular to a long-range tracking control method using a remaining track number, a sensed speed and a sensed acceleration to perform adaptive proportional differential control on a radial actuator . Background technique [0002] When designing the control chip of the optical drive, the control of the pickup head is a key point. The control of the radial movement of the read head generally includes static tracking, short seeking and long seeking (sometimes called long jumping). In Taiwan Patent No. 479248 "Long SEEKING METHOD USEDIN AN OPTICAL DISC DRIVE Control System and Method", No. 514893 "Optical Drive Long-distance Seeking Control System and Method", and U.S. No. 6,606,283 "LONG SEEKING METHOD USEDIN AN OPTICAL DISC DRIVE " and other patent cases have disclosed the method and related system structure used in long-distance tracking. [0003] Generally speaking, the follo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B7/085G11B21/02G11B21/08G11B19/20
Inventor 张鸿祥曾德旺
Owner MEDIATEK HEFEI
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