WO2002063623A1 - Dispositif et procede de commande de positionnement - Google Patents
Dispositif et procede de commande de positionnement Download PDFInfo
- Publication number
- WO2002063623A1 WO2002063623A1 PCT/JP2002/000923 JP0200923W WO02063623A1 WO 2002063623 A1 WO2002063623 A1 WO 2002063623A1 JP 0200923 W JP0200923 W JP 0200923W WO 02063623 A1 WO02063623 A1 WO 02063623A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- delay
- positioning control
- moving member
- target
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/095—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble
- G11B7/0956—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for tilt, skew, warp or inclination of the disc, i.e. maintain the optical axis at right angles to the disc
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59605—Circuits
- G11B5/59611—Detection or processing of peak/envelop signals
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59605—Circuits
- G11B5/59622—Gain control; Filters
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59627—Aligning for runout, eccentricity or offset compensation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/42—Servomotor, servo controller kind till VSS
- G05B2219/42338—Position tracking control
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
Definitions
- the present invention relates to a control technique for positioning and following a member to a target position, and particularly relates to a track following control device in an optical disc device, a focus following (focus control) device, or a tracking device in a magnetic disk device.
- TECHNICAL FIELD The present invention relates to a positioning control device and a positioning control method for positioning and following a transducer for recording and reproducing a signal such as a light spot or a magnetic head with respect to a record carrier.
- an optical disc device that records or reproduces information by irradiating a disc-shaped record carrier with a light beam
- a high-precision beam follow-up or disc-tracking on a track for recording information is performed.
- High-precision focus control (focus following) that responds to surface shake is required.
- the first prior art includes a signal delay means for integrating and accumulating the position error signal in synchronization with the rotation cycle with respect to a position change having a fixed cycle.
- the instantaneous position error signal is added to the signal delay means and input to the signal delay means, and the position error signal is added to the input of the movable member driving means.
- the transfer function of the driving means is G (s) and the periodic position change of the target member is Xi
- the relative position error is obtained when the periodic position change is repeated n times.
- the error is compressed only in the frequency domain where the absolute value of 1 + G (s) is sufficiently larger than 1, even if the position is periodically changed.
- + G (s) is smaller than 1, the error is not compressed but rather expands (diverges).
- the driving means has a second-order phase delay characteristic
- the gain (absolute value) of G (s) is a frequency near 1 and a phase delay near 180 degrees exists, 1 + G
- 1 / (1 + G (s)) indicates how small the position error originally existing can be controlled by the control, that is, the error compression ratio.
- the displacement of the information recording position on the disk (in other words, the target member) synchronized with the rotation of the disk can be greatly reduced because the gain of the drive means is somewhat large and 1 + G Only the frequency range where the condition that (s) is sufficiently larger than 1 is secured, and the frequency where 1 + G (s) is close to 1 or smaller than 1 (frequency range higher than near the cut-off frequency of the control loop) Then, there was a problem that the error compression effect could not be expected.
- the present invention has been made in view of such a problem, and an object of the present invention is to use a periodicity of a position variation having a periodicity to unnecessarily reduce the gain of the control system transfer characteristic.
- An object of the present invention is to provide a positioning control device and a positioning control method capable of reducing a relative position error in position following without increasing a frequency band. Disclosure of the invention
- the gist of the invention according to claim 1 of the present invention is a positioning control device that causes a moving member to follow a target member that repeats substantially equal positional fluctuations at a constant period, and wherein the target member has a target positioning position.
- a position detector that detects a relative position error between the target member and the moving member; an adder that adds a position error signal output from the position detector and a delay signal; and a target member that receives an output of the adder.
- a signal delay unit that outputs the delay signal delayed by the period of the position change, a driving unit that moves the moving member, and a signal obtained by adding the position error signal and the delay signal to the driving unit.
- the gist of the invention described in claim 2 of the present invention is characterized in that the specific frequency range includes a frequency at which the transfer characteristic of the driving means is close to a gain of 1.
- a positioning control device according to claim 1.
- the gist of the invention described in claim 3 of the present invention is that the predetermined frequency characteristic is substantially equal to the inverse characteristic (1 ZG) of the transmission characteristic (G) of the driving means.
- the gist of the invention described in claim 4 of the present invention is a positioning control device that causes a moving member to follow a target member that repeats substantially equal position fluctuations at a constant cycle, and A position detector for detecting a relative position error between a target positioning position and the moving member, an adder for adding a position error signal output from the position detector and a delay signal, and an output from the adder A signal delay unit for outputting the delay signal delayed by the period of the position change of the target member, a driving unit for moving the moving member in a target direction, and adding the position error signal and the delay signal.
- the calculated signal is input to the driving means, and the driving means is moved so that the moving member moves in a specific frequency range substantially equal to the position variation indicated by the delay signal. Or a means for urging the moving member.
- the gist of the invention according to claim 5 of the present invention is a positioning control method for causing a moving member to follow a target member that repeats substantially equal position fluctuations at a fixed cycle, and A position detection step of detecting a relative position error between a target positioning position and the moving member, an addition step of adding a position error signal output from the position detection step and a delay signal, and an output of the addition step A signal delay step of outputting the delay signal delayed by the period of the position change of the target member, a driving step of moving the moving member, and a signal obtained by adding the position error signal and the delay signal.
- a positioning control method characterized by comprising:
- the gist of the invention according to claim 6 of the present invention is that the specific frequency range includes a frequency at which a transfer characteristic of the driving process is close to a gain of 1. It lies in the positioning control method.
- the gist of the invention described in claim 7 of the present invention is that the predetermined frequency 6.
- the gist of the invention described in claim 8 of the present invention is a positioning control method for causing a moving member to follow a target member that repeats substantially equal position fluctuations at a constant period, and A position detection step of detecting a relative position error between a target positioning position and the moving member, an addition step of adding a position error signal output from the position detection step and a delay signal, and an output of the addition step A signal delaying step of outputting the delay signal delayed by the period of the position change of the target member, a driving step of moving the moving member in a target direction by using a driving unit, A signal obtained by adding the delay signal is input to the driving step, and the moving member moves in a specific frequency range substantially equal to the amount of position variation indicated by the delay signal. And a step of biasing the driving means or the moving member as described above.
- the output of the signal delay means which accumulates and accumulates the relative position error between the target position having the periodic position fluctuation and the movable member, is simply added to the instantaneous position error signal and supplied to the drive means.
- the output of the delay means is separately supplied to the drive means through a filter having a specific characteristic, or is used as a signal for separately moving the movable member. It is possible to keep the position error of the small. As a result, the position following ability to a disk rotating at high speed is remarkably improved, and there is an effect that it is easy to achieve a high recording density of an optical disk, a magnetic disk device and the like.
- the output of the signal delay means is XL
- the output of the drive means is Assuming that the arrival characteristic is G (s), the characteristic when driving the movable member by adding the position error signal and the output of the delay means is:
- a mouth-to-pass filter (transfer characteristic 2 Fi (s)) is arranged at the input part of the signal delay means, and the convergence condition of the position error is calculated by the following equation (4). It is a general method to relax.
- Xe (n) Xi-G (s) (e (n) + XL (n) + F (s) XL (n)
- Xe (1) is the position error when the delay means output is 0,
- Equation 5 Comparing Equation 5 above with Equation 1 under the conventional conditions, the denominator side is the same (1 + G (s)) n , but the numerator side is the same as the previous one, but ⁇ 1— G (s ) F (s
- the position control system since G (s) includes the transfer characteristics of the driving means, the position control system generally includes the second-order phase delay characteristics. Therefore, to make G (s) F (s) close to 1 over the frequency domain of S ⁇ ⁇ , introduce a derivative term into F (s) (F (s) 's molecular order> F (the degree of the denominator of (s)). Although it is practically difficult to realize the filter including the derivative term, the cutoff frequency of the control loop where 1 + G (s) becomes smaller than 1 (the frequency at which the gain of G (s) becomes 0 dB) and its vicinity If such characteristics can be set in a part of the higher frequency range, practically sufficient positional error compressibility can be obtained.
- G (s) includes only the first-order phase delay characteristic, as in a speed control system
- FIG. 1 is a block diagram showing a first embodiment of a positioning control device according to a first embodiment of the present invention.
- FIG. 2 is a block diagram of a focus following device in the optical disk device shown in FIG.
- FIG. 3 is a frequency characteristic diagram for explaining the operation of the positioning control device shown in FIG.
- FIG. 4 is a frequency characteristic diagram for explaining the operation of the positioning control device shown in FIG.
- FIG. 5 is a frequency characteristic diagram for explaining the operation of the positioning control device shown in FIG.
- FIG. 6 is a frequency characteristic diagram for explaining the operation of the positioning control device shown in FIG.
- FIG. 7 is a frequency characteristic diagram for explaining the operation of the positioning control device shown in FIG.
- FIG. 8 is a block diagram of a positioning control device according to a third embodiment of the present invention. You.
- Reference numeral 1 means an optical disk.
- Reference numeral 2 indicates an information recording position.
- Reference numeral 3 indicates a light beam spot.
- Reference numeral 4 indicates an objective lens.
- Reference numeral 5 indicates a focus factor.
- Reference numeral 6 denotes a photodetector.
- Reference numeral 7 denotes an optical head.
- Reference numeral 8 denotes a laser light source.
- Reference numeral 9 denotes a spindle motor.
- Reference numeral 10 denotes a first addition circuit.
- Reference numeral 11 denotes a second addition circuit.
- Reference numeral 12 denotes a first filter.
- Reference numeral 13 denotes signal delay means.
- Reference numeral 14 denotes a second filter.
- Reference numeral 15 denotes a position error signal operation circuit.
- Reference numeral 16 denotes a delay element.
- Reference numeral 17 denotes a third adding circuit.
- Reference numeral 18 denotes a third filter.
- Reference numeral 19 denotes a clock generator.
- Reference numeral 20 means a driving means.
- Reference numeral 31 denotes a fourth adder.
- Reference numeral 50 indicates the optical axis direction.
- Reference numeral 51 indicates a spindle motor rotation axis.
- Reference numeral 101 denotes a clock signal.
- Reference numeral 102 denotes an input signal.
- the code Xe means a position error signal.
- the symbol X i indicates a change in the target position.
- the code XL represents a delayed signal.
- the symbol Xo indicates the amount of movement of the movable member.
- FIG. 1 is a block diagram showing a configuration of a focus following (focal position control) device in the optical disc device according to the first embodiment of the present invention.
- a light beam output from a laser light source 8 is converged by an objective lens 4 via an optical head 7 and irradiated on the optical disc 1.
- the light beam spot 3 (focusing position of the light beam) which is a moving member in the present embodiment is displaced (movable) by driving the objective lens 4 in the optical axis direction 50 of the light beam by the focus actuator 5.
- the amount of movement of the member is Xo).
- the spindle motor 9 rotates the optical disc 1 at a substantially constant cycle by a controller of the spindle motor 9 not shown.
- the information recording position 2 on the optical disk 1, which is the target member in the present embodiment, varies with the rotation of the optical disk 1 and has substantially the same position variation with a substantially constant period in the optical axis direction 50 of the optical beam ( Change of target position The motion X i) is repeated.
- reference numeral 51 denotes a spindle motor rotating shaft.
- the return light signal from the optical disc 1 is converted into an electric signal by the photodetector 6 via the objective lens 4 and the optical head 7 and output to the position error signal operation circuit 15.
- the position error signal calculation circuit 15 extracts and outputs a focus error signal from the output signal of the photodetector 6. For detecting a focus error signal, a knife edge method, an astigmatism method, or the like is generally used.
- a position detector is constituted by the laser light source 8, the optical head 7, the photodetector 6, and the position error signal operation circuit 15 relating to the detection of the focus error signal.
- the focus error signal output from the position error signal calculation circuit 15 forms the position error signal Xe.
- a positioning control system that causes the optical beam spot 3 to follow the information recording position 2 on the optical disk 1 is configured.
- the first adding circuit 10 adds the position error signal Xe and the delay signal XL output from the signal delay means 13 and outputs the result to the first filter 12.
- the first filter 12 subjects the output of the first adder circuit 10 to band limiting processing and outputs the result to the delay element 16.
- the delay element 16 outputs a delay signal XL which is obtained by delaying the output signal of the first filter 12 by a time L substantially equal to the period of one rotation of the disk.
- the delay element 16 may be any means as long as a predetermined signal delay can be obtained.
- a positioning controller is configured as an analog controller as shown in this embodiment, a CCD ( It is convenient to use a delay element 16 using a charge coupled device (Charge Coupled Device).
- the CCD shifts the input signal 102 of the delay element 16 to the output side in accordance with the clock signal 101 output from the clock generator 19, and is a kind of shift register for an analog signal. A signal delay corresponding to one cycle is obtained.
- the positioning controller is configured as a digital controller, a simple method is to input the output signal data of the first filter 12 to a shift register operated by the clock signal 101 and delay the signal. is there.
- the signal delay means 13 of the present embodiment is constituted mainly by a delay element 16, a first filter 12, and a clock generator 19.
- the delay signal XL is obtained by adding the position error signal up to one rotation before the optical disc 1 within the limited band of the first filter 12. Therefore, the delay signal XL continues to increase with each rotation of the optical disk 1 while the position error within the limited band of the first filter 12 remains, and within the limited band of the first filter 12. The integration is performed until the position error signal of the signal becomes 0 (zero).
- the second adding circuit 11 adds the position error signal Xe and the delay signal XL and outputs the result.
- the second filter 14 performs a predetermined filtering process on the delayed signal XL and outputs the result.
- the characteristic of the second filter 14 is the same as that of the filter having the inverse characteristic of the driving means 20 (see FIG. 2) described later. It can be realized without differentiating operation by serially connecting low-pass filters with a wide cut-off frequency compared to the cut-off frequency of the control loop.
- the third adding circuit 17 adds the output of the second adding circuit 11 and the output of the second filter 14 and outputs the result.
- the third filter 18 receives the output of the third adding circuit 17, performs gain adjustment processing, performs phase compensation processing, amplifies power, and outputs the result.
- the forcible actuator 5 receives the output of the third filter 18 and drives the objective lens 4 in the optical beam direction 50 of the optical beam.
- the driving means 20 is constituted by the focus factor 5 relating to the movement of the light beam sbot 3 and the third filter 18.
- FIG. 2 is a block diagram of a focus following device in the optical disk drive shown in FIG.
- the gain characteristic of the system from the moving amount Xo of the movable member to the position error signal Xe is approximately normalized to 1.
- the transfer characteristic P of the focus actuator 5 in the present embodiment can be approximated by a 27-phase delay system represented by the following equation (8).
- transfer characteristic C (s) of the third filter 18 is as shown in the following equation 10, the gain diagram and phase diagram of Figs. 3 (a) and 3 (b).
- Figures 3 (a) and 3 (b) show the lag characteristics with a phase near 180 degrees near the frequency where the gain is 1 (O dB) (the power cutoff frequency of the focus control loop: 2 kHz). Therefore, in the driving means 20 of the present embodiment, the compression performance of the size error at a frequency of 2 kHz or more cannot be expected.
- the transfer characteristic F (s) of the second filter 14 is close to the cutoff frequency of the focus control loop, and higher than that, In the range of the portion, the characteristics are almost equal to the inverse characteristics of the driving means 20.
- inverse characteristic of the focus ⁇ Chi Yue one data 5 contained in G (s) one 1: P (s) - 1 is an approximation characteristic of the focus ⁇ Chi Yu eta 5 determined experimentally in advance I'll use and ask.
- the limited band in the transfer characteristic of the first filter 12 is set to a frequency higher than 6 kHz, which is the power-off frequency of the control loop, and a frequency of 6 kHz, and the following equation 12 is obtained.
- Figure 4 shows the convergence condition of the position error shown in Equation 7 when Equations 8 to 12 are set.
- the convergence condition of the position error shown in the above Expression 7 is satisfied.
- I 1 + G (s) I shown in (a) gives O dB near 2 kHz of the cutoff frequency of the control loop. Therefore, as shown in (c), 1 F i (s) I does not satisfy the error convergence condition of Equation 4, and the cut-off frequency of the first filter 12 is equal to or less than the cut-off frequency of the control loop, for example, (d) had to be set.
- the present embodiment it can be seen that it is possible to set a frequency exceeding the cutoff frequency of the control loop with the transfer characteristic F i (s).
- FIG. 5 shows a gain diagram of the compression characteristic Gcs (s) in the present embodiment. It can be seen that a compression effect of 10 dB or more can be obtained in the vicinity of the cut-off frequency (2 kHz) of the control loop where almost no compression effect was obtained in the past, at a position error synchronized with the rotation of the optical disc 1.
- Equation 1 1 the inverse characteristic of the focus ⁇ click Chueta the transfer characteristic F (s) as shown in Equation 1 1: P (s) has been as one 1 is included, the focus ⁇ lipped Yue over data Using the point that the primary resonance frequency of (5) is about 50 Hz, which is sufficiently lower than the power cutoff frequency of the control loop of 2 kHz, and can be approximated by the second-order integration characteristic near the power loop of the control loop, The transfer characteristic F (s) can be simplified as in the following Expression 16.
- FIG. 8 is a block diagram of the positioning control device according to the third embodiment of the present invention.
- FIG. 2 showing the block diagram of the first embodiment
- the output of the second filter 14 is added to the input side of the third filter 18 using the second addition circuit 17.
- the above equation 11 is replaced with the following equation 17, and the output of the second filter 14 is converted to the output of the third filter 18 using the fourth adder 31.
- the focus actuator 5 is directly energized by adding it to the output side.
- the present invention is not limited to the above embodiments, and that the embodiments can be appropriately changed within the scope of the technical idea of the present invention.
- the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a suitable number, position, shape, and the like for implementing the present invention. In each drawing, the same components are denoted by the same reference numerals. .
- Industrial Applicability Since the present invention is configured as described above, it is possible to utilize the periodicity for the position fluctuation having the periodicity, and to increase the position or the frequency band of the control system transfer characteristic without unnecessarily increasing the position. Since the relative position error in tracking can be reduced, the position error at a frequency higher than the vicinity of the cutoff frequency of the control loop, which has been conventionally restricted, can be reduced.
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Optical Recording Or Reproduction (AREA)
- Control Of Position Or Direction (AREA)
- Moving Of The Head To Find And Align With The Track (AREA)
- Vehicle Body Suspensions (AREA)
- Paper (AREA)
- Numerical Control (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02710503A EP1367586B1 (en) | 2001-02-07 | 2002-02-05 | Positioning control device and positioning control method |
US10/470,727 US7280448B2 (en) | 2001-02-07 | 2002-02-05 | Positioning control device and positioning control method |
AT02710503T ATE437436T1 (de) | 2001-02-07 | 2002-02-05 | Positionierungssteuereinrichtung und -verfahren |
DE60233034T DE60233034D1 (de) | 2001-02-07 | 2002-02-05 | Positionierungssteuereinrichtung und -verfahren |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001030525A JP4193362B2 (ja) | 2001-02-07 | 2001-02-07 | 位置決め制御装置及び位置決め制御方法 |
JP2001-30525 | 2001-02-07 |
Publications (1)
Publication Number | Publication Date |
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WO2002063623A1 true WO2002063623A1 (fr) | 2002-08-15 |
Family
ID=18894735
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/000923 WO2002063623A1 (fr) | 2001-02-07 | 2002-02-05 | Dispositif et procede de commande de positionnement |
Country Status (6)
Country | Link |
---|---|
US (1) | US7280448B2 (ja) |
EP (1) | EP1367586B1 (ja) |
JP (1) | JP4193362B2 (ja) |
AT (1) | ATE437436T1 (ja) |
DE (1) | DE60233034D1 (ja) |
WO (1) | WO2002063623A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007132911A1 (ja) * | 2006-05-17 | 2007-11-22 | Nec Corporation | 位置決め制御装置、及び、光ディスク装置 |
JP5422789B2 (ja) * | 2008-10-27 | 2014-02-19 | 歸山 敏之 | Mems微小構造体駆動制御方法と制御装置 |
CN103605374A (zh) * | 2013-08-30 | 2014-02-26 | 天津市亚安科技股份有限公司 | 一种能提高云台定位精度的装置及方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59223977A (ja) * | 1983-06-01 | 1984-12-15 | Mitsubishi Electric Corp | 情報記録デイスク再生装置 |
JPS6310384A (ja) * | 1986-07-02 | 1988-01-16 | Sony Corp | 回転記録媒体に対するサ−ボ方式 |
JP2001126421A (ja) * | 1999-10-29 | 2001-05-11 | Sony Corp | ディスクドライブ装置およびディスクドライブ装置のヘッド位置決め制御方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6057085B2 (ja) * | 1977-11-08 | 1985-12-13 | 日本電気株式会社 | 位置決め制御装置 |
US5805374A (en) * | 1992-10-16 | 1998-09-08 | International Business Machines Corporation | Method and apparatus for fast positioning a head of a recording device |
JP3536455B2 (ja) | 1995-08-04 | 2004-06-07 | 三菱電機株式会社 | 繰り返し補償器およびこの繰り返し補償器を備えたディスク装置 |
US7136339B2 (en) * | 2001-05-30 | 2006-11-14 | Nec Corporation | Positioning control apparatus and method capable of reducing relative position error without increasing gain and frequency band of transfer characteristics of control system |
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2001
- 2001-02-07 JP JP2001030525A patent/JP4193362B2/ja not_active Expired - Fee Related
-
2002
- 2002-02-05 US US10/470,727 patent/US7280448B2/en not_active Expired - Fee Related
- 2002-02-05 DE DE60233034T patent/DE60233034D1/de not_active Expired - Lifetime
- 2002-02-05 AT AT02710503T patent/ATE437436T1/de not_active IP Right Cessation
- 2002-02-05 EP EP02710503A patent/EP1367586B1/en not_active Expired - Lifetime
- 2002-02-05 WO PCT/JP2002/000923 patent/WO2002063623A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59223977A (ja) * | 1983-06-01 | 1984-12-15 | Mitsubishi Electric Corp | 情報記録デイスク再生装置 |
JPS6310384A (ja) * | 1986-07-02 | 1988-01-16 | Sony Corp | 回転記録媒体に対するサ−ボ方式 |
JP2001126421A (ja) * | 1999-10-29 | 2001-05-11 | Sony Corp | ディスクドライブ装置およびディスクドライブ装置のヘッド位置決め制御方法 |
Also Published As
Publication number | Publication date |
---|---|
ATE437436T1 (de) | 2009-08-15 |
US20040240339A1 (en) | 2004-12-02 |
JP4193362B2 (ja) | 2008-12-10 |
JP2002237154A (ja) | 2002-08-23 |
EP1367586A4 (en) | 2007-10-24 |
US7280448B2 (en) | 2007-10-09 |
DE60233034D1 (de) | 2009-09-03 |
EP1367586A1 (en) | 2003-12-03 |
EP1367586B1 (en) | 2009-07-22 |
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