CN1484228A - Slide motor control method for optical disk device - Google Patents
Slide motor control method for optical disk device Download PDFInfo
- Publication number
- CN1484228A CN1484228A CNA021370710A CN02137071A CN1484228A CN 1484228 A CN1484228 A CN 1484228A CN A021370710 A CNA021370710 A CN A021370710A CN 02137071 A CN02137071 A CN 02137071A CN 1484228 A CN1484228 A CN 1484228A
- Authority
- CN
- China
- Prior art keywords
- motor
- stage
- stepping
- control method
- lens
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention refers to a kind of optical disk sliding electricity machine control method, in order to reduce the position error of lens and control the best state of optical disk driving. Moves the collector through electricity machine according to the current error value of lens; confirms the value according to movement; and drives the electricity machine and eliminates the lens tilt, when the optical disk is driven, through online adaptive course, makes the error limited to smallest, thus makes the tilt smallest.
Description
(1) technical field
The present invention relates to the slide motor control method of optical disc apparatus, when referring in particular to disc drives, minimally control lens misplace, and make it to form the method for optimal drive state.
(2) background technology
Shown in Figure 1 is existing optical disc apparatus servo system structure, spindle drive motor 11 makes CD 10 rotations, and the thing lens that light picks up in 20 are with the vertical direction focus servo, carries out the tracking servo operation with horizontal direction, follow the conduit of CD 10, sense data according to slip.Control does not connect when carrying out with being used to if slide, and tilt phenomenon appears in the thing lens, at this moment, (shown in Figure 2 be the degree of tilt of thing lens and the relation between the amount of jitter) shake (jitter) as Fig. 2 just characteristic go wrong.Then, required is, can make light picker 20, carries out whole slip of moving.
For slip, because its answer speed ratio regulators is slow, so, often use motor, normally slide motor 21 is substituted DC motor or stepping motor.
Wherein, the DC motor can be considered simulated action, although can eliminate the inclination of the thing lens that generate when generally playing, but, when exploring action for the access between the position, have to use the other scrambler of measuring amount of movement, this is the problem of a fly in the ointment.
In addition, stepping motor can be considered digitized action, can estimate its amount of movement during exploration, although needn't be with attachment devices such as scramblers, but when generally playing, can not eliminate the inclination of thing lens constantly, so can only adopt after the degree of tilt of thing lens runs up to a certain degree the method for Xiao Chuing in the lump.Then, in order to ensure the lens tilt of forward, be necessary the inclination of control step motor critically.For this reason, utilize micro-stepping (Micro-step) driving method.
Shown in Figure 3 is the FEEDBACK CONTROL figure of stepping motor when generally playing.Among the figure, be connected to phase compensator 22 between pulse producer 23 and the light picker 20.Pulse producer 23 is owing to carry out following operation, so can eliminate the inclination of thing lens, promptly, the E value is during greater than the Δ v value that is set, the stepping motor positive dirction is moved 1 micro-stepping (E＞Δ V, then 1micro-step move forward), if, the E value less than be set-the contrary direction of above-mentioned stepping motor moved during Δ V 1 micro-stepping (E＜-Δ V, then1Micro-step move backward).Wherein, E is in the play operation, and with the lens dislocation value of actual detected, Δ V is the lens dislocation value that presets.
But aforesaid method is, what selects Δ V according to, then has following several problem:
At first, Δ V is set in when also littler than adequate value, and as Fig. 4, the lens dislocation is that benchmark continues shake with the center, and this is to shake inside and outside the light picker 20, and causes shaking inside and outside the thing lens, and this is the place of problem;
If Δ V is during greater than adequate value, as Fig. 5, although there is not jitter phenomenon, the thing lens of light picker 20 are toward lopsidedness, and bouncing characteristic is bad when reading, during data recording, under the same light quantity condition be in centre bit different problem arranged;
Again, shown in Figure 6 is, with Δ V with adequate value fixed situation.This situation also is when micro-stepping drives, because the machine error and the drive current error of stepping motor go on foot the problem that still exists actual difference of moving to each.
Among Fig. 4-6, thing lens position error during the fricton-tight operation of broken string expression, thing lens position error when straight line is represented slide is arranged.
Then, the light quantity characteristic the when enhancing of the bouncing characteristic during for data playback and data recording strengthens, exists with Δ V, with the necessity that detects automatically by the step.
(3) summary of the invention
The present invention creates in order to solve the above problems.
When the objective of the invention is disc drives, by the online procedure of adaptation, allow thing lens dislocation Δ V reach minimum value, do not have inclination so that the thing lens to be provided, disc drives is with the slide motor control method of a kind of optical disc apparatus of optimum condition formation.
In order to achieve the above object, the slide motor control method of optical disc apparatus of the present invention is: the 1st stage was the dislocation value according to existing thing lens, moved light picker by motor; The 2nd stage was the thing lens dislocation value that is changed according to above-mentioned mobile affirmation; And the 3rd stage was according to the dislocation value of the thing lens of above-mentioned affirmation, drove described motor, eliminated described thing lens tilt.
The method of the slide motor control of a kind of optical disc apparatus of the present invention comprises:
The 1st stage was according to present thing lens dislocation value, by motor, and mobile pick-up; The 2nd stage was the dislocation value of confirming along with the thing lens of above-mentioned mobile change; The 3rd stage was according to the dislocation value of the thing lens of above-mentioned affirmation, drove described motor, to eliminate described thing lens tilt.
Effect of the present invention: according to the slide motor control method of optical disc apparatus of the present invention, during disc drives, by online process, minimum degree ground reduces lens dislocation (Δ V), thus, the inclination of the inner thing lens of light picker is minimized, and when data playback, the feature of beating just strengthens, when data recording, the light quantity characteristic just strengthens, and is one and produces effect very much, invention of great use.
For further specifying above-mentioned purpose of the present invention, design feature and effect, the present invention is described in detail below with reference to accompanying drawing.
(4) description of drawings
Shown in Figure 1 is the servo system structure of existing optical disc apparatus;
Shown in Figure 2 is the degree of tilt of thing lens and the relation between the amount of jitter;
Shown in Figure 3 is when general the broadcast, the FEEDBACK CONTROL figure of stepping motor;
The setting of shown in Figure 4 is Δ V during less than the adequate value set for example;
The setting of shown in Figure 5 is Δ V during greater than the adequate value set for example;
During adequate value that Δ V=sets that shown in Figure 6 is for example;
Shown in Figure 7 is the process flow diagram of embodiments of the invention;
The full step of shown in Figure 8 is stepping motor drives and micro-stepping when driving, to the example of the drive current of each phase place;
Shown in Figure 9 is the online procedure of adaptation;
When shown in Figure 10 is stepping motor micro-stepping driving, to the answering delay of attenuating.
(5) embodiment
Referring to Fig. 7, shown in Figure 7 is, according to the process flow diagram of the embodiment of the slide motor control method of optical disc apparatus of the present invention, and with reference to the servo system structure of Fig. 1, the slide motor control method of Fig. 7 according to the present invention, it is described as follows:
Sampling V (K) when K;
Whether differentiate V (K)＜0, if＜0, obtain current micro-stepping phase place i; Whether differentiate V (K) then＜Δ V
I-1, if＜Δ V
I-1, then betray to walking 1 micro-stepping, if not＜Δ V
I-1, then finish;
If V (K) is not＜0, whether differentiate V (K) again＜and 0, if not＜0, then finish; If＜0, current micro-stepping phase place i would be obtained; Whether differentiate V (K) then＜Δ V
I-1, if＜Δ V
I-1, then betray to walking 1 micro-stepping, if not＜Δ V
I-1, then finish;
Betray after walking 1 micro-stepping in K+ Δ K=ε
kIn time, take a sample;
Computing formula Δ V
I-1(K+1)=Δ V
I-1(K)+η (ε
n), finish.
Usually, stepping motor is can go on foot (Full Step) entirely to drive.At this moment, the drive current of stepping motor is F shown in Figure 8
1, F
2, F
3, F
4, its angle of revolution is assumed to θ
s, giving an example when N=12.At this moment, drive current and Fig. 8 of above-mentioned stepping motor is such, and the micro-stepping stepping is S
1, S
2... Sn can more critically control moving of stepping motor, and the angle of revolution of this moment is θ
S/ n.
According to θ
SWith the rotating slip amount of movement ls of 360 degree of above-mentioned stepping motor, 1 micro-stepping amount of movement (θ of above-mentioned stepping motor
s/ (N360)) and ls, the variation of the rotating lens dislocation value of corresponding above-mentioned stepping motor 1 micro-stepping, also along with n, θ
S, ls changes and changes, and will suitably control slip according to stepping motor kind, micro-stepping stepping by mechanism characteristics.
But, regular characteristic and the n value of digital to analog converter DAC (Digital-To-Analog Converter) can not be embodied θ on the mechanical property of stepping motor definitely
SIt can not be constant.The present invention is that in general play operation, realization allows Δ V adapt at online (on-line) algorithm, seeks error is carried out minimized Δ V.
For this reason, at first the n value so that regular error was showed of DAC changes possibility, although on unusual micro-stepping driving method shown in Figure 6, can not embody, but, on reality realizes, because non-linear (non-linear) characteristic of noise or DAC distortion phenomenon may occur in a part of interval, the definition of all step phasetophase amount of movements, as follows:
Δθi，i＝1，……，4N
Here, Δ θ i is, on the side of stepping motor drive current, see, from stepping phase place i to stepping phase place i+1, the perhaps rotation angle of stepping motor from stepping phase place i+1 to stepping phase place i.
The variation of the lens dislocation of the rotation angle of relevant stepping phasetophase, just like giving a definition:
ΔVi，i＝1，……，4n
Δ Vi thus defined, that is, the variation of lens dislocation is as shown in Figure 9, by the online procedure of adaptation, just can seek.
Utilize the present Δ Vi that tries to achieve like this, at step phase place Si, with Si+1, carry out when mobile, if correctly obtain the result, the lens dislocation after then moving is 0, but be that mobile range is when bigger than normal, less than normal, with Δ Vi (k+1)=Δ Vi (k)+η (ε of formula 1 more
k), (0＜η≤1) is same, adapts to presence gradually, thereby can eliminate error in next time when mobile.At this moment, increase η (eta) amount of learning rate in formula 1, although the noise effect when reducing analog/digital conversion for Min. ground the most desirable when 1, is considered The noise, is the most feasible number with 0＜η＜1.
All online procedures of adaptation are as shown in Figure 7.The same with Fig. 9, at K+ Δ K, the reason of taking a sample is, and is the same with Figure 10, should consider the time of actual stepping motor spin stabilizationization, and the attenuation degree that part produced that connects at stepping motor light picker 20 carries out suitable adjusting.Above-mentioned stepping motor carries out when mobile with 1 micro-stepping, actual lens dislocation and the same conversion shown in Figure 9, and the stabilizing take of stepping motor is very short, Δ K pays attention to influencing and decays, and is necessary to consider the selection of utensil characteristic.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (5)
1. the slide motor control method of an optical disc apparatus is characterized in that described method comprises:
The 1st stage was that the motor according to mobile light picker moves, and measured the variation of thing lens dislocation value;
The 2nd stage was the variation according to above-mentioned mensuration, drove described motor, to eliminate described object lens inclining.
2. as the slide motor control method of 1 described optical disc apparatus of claim the, the motor that it is characterized in that mobile light picker in described the 1st stage is to drive the stepping motor that method was driven according to micro-stepping.
3. as the slide motor control method of 1 described optical disc apparatus of claim the, it is characterized in that driving in described the 2nd stage described motor, be variation according to described mensuration, with described motor machine towards forward or towards reverse move finished.
4. the slide motor control method of an optical disc apparatus is characterized in that described method comprises:
The 1st stage was according to present thing lens dislocation value, by motor, and mobile pick-up;
The 2nd stage was the dislocation value of confirming along with the thing lens of above-mentioned mobile change;
The 3rd stage was according to the dislocation value of the thing lens of above-mentioned affirmation, drove described motor, to eliminate described thing lens tilt.
5. as the slide motor control method of 4 described optical disc apparatus of claim the, the above-mentioned thing lens dislocation value that it is characterized in that being identified in described the 2nd stage in described the 3rd stage is less than described present thing lens dislocation value, with above-mentioned motor, carry out forward with 1 micro-stepping and move.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021370710A CN1484228A (en) | 2002-09-20 | 2002-09-20 | Slide motor control method for optical disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021370710A CN1484228A (en) | 2002-09-20 | 2002-09-20 | Slide motor control method for optical disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1484228A true CN1484228A (en) | 2004-03-24 |
Family
ID=34146842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA021370710A Pending CN1484228A (en) | 2002-09-20 | 2002-09-20 | Slide motor control method for optical disk device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1484228A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7613090B2 (en) | 2004-05-19 | 2009-11-03 | Hitachi-Lg Data Storage Korea, Inc. | Apparatus and method for controlling tilt in optical disc device |
| US7755992B2 (en) | 2004-05-19 | 2010-07-13 | Lg Electronics Inc. | Method and apparatus for controlling tilt in an optical disc device |
-
2002
- 2002-09-20 CN CNA021370710A patent/CN1484228A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7613090B2 (en) | 2004-05-19 | 2009-11-03 | Hitachi-Lg Data Storage Korea, Inc. | Apparatus and method for controlling tilt in optical disc device |
| US7755992B2 (en) | 2004-05-19 | 2010-07-13 | Lg Electronics Inc. | Method and apparatus for controlling tilt in an optical disc device |
| CN1734596B (en) * | 2004-05-19 | 2010-07-14 | 日立-Lg数据存储韩国公司 | Apparatus and method for controlling incline in compact disc equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6347018B1 (en) | Digital servo control system for use in disk drives | |
| CN1309804A (en) | Current profile shaping to reduce disc drive seek time variation and acoustic noise generation | |
| CN1363087A (en) | Repeatable runout compensation using a learning algorithm with scheduled parameters | |
| CN1200416C (en) | Disc driving servo system and method for eccentricity compensation | |
| CN1154013C (en) | Method and apparatus for controlling power of laser diode | |
| US5781699A (en) | Method for optimization of channel parameters in a data storage device | |
| CN1484228A (en) | Slide motor control method for optical disk device | |
| CN1171225C (en) | Method for controlling playback speed of optical disk | |
| CN1249717C (en) | Equipment and method for eliminating disturbance | |
| CN1315126C (en) | Device and method for controlling step motor of optical disc driving system | |
| US6018432A (en) | Disc drive operational response using idle mode compensation | |
| CN1095167C (en) | Device for reading and/or recording information on a disc-shaped information carrier | |
| CN1253868C (en) | Optical disc equipment and method for controlling sliding block | |
| CN1297967C (en) | Rotation correcting apparatus and optical disk apparatus | |
| CN1114774A (en) | Time-lapse video cassette recorder | |
| CN1131513C (en) | Pickup control device for optical disk drive | |
| CN1241187C (en) | Inclination compensating apparatus and method | |
| CN1822128A (en) | Method for compensating writing power in optical disc device | |
| CN1238844C (en) | Method and apparatus for inclination adjustment by flutter feedback | |
| CN1183536C (en) | Method for automatically controlling bandwidth of waveform equalizer | |
| CN1253866C (en) | Controlling method and apparatus for feeding motor transfer of optical record player | |
| CN1210713C (en) | Oblique regulator of magnetic disc player | |
| CN1162847C (en) | Cyclic track servo system and method for VCD drive | |
| CN1797560A (en) | Equipment for controlling traction motor in optical disk device, and method | |
| CN1591665A (en) | Inclination regulator for light picking up device of optical disk player |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |