WO2007099635A1 - アクチュエータの速度変動抑制方法 - Google Patents
アクチュエータの速度変動抑制方法 Download PDFInfo
- Publication number
- WO2007099635A1 WO2007099635A1 PCT/JP2006/303984 JP2006303984W WO2007099635A1 WO 2007099635 A1 WO2007099635 A1 WO 2007099635A1 JP 2006303984 W JP2006303984 W JP 2006303984W WO 2007099635 A1 WO2007099635 A1 WO 2007099635A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- speed
- actuator
- error correction
- correction data
- rotation
- Prior art date
Links
Classifications
-
- 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
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/416—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by control of velocity, acceleration or deceleration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/10—Arrangements for controlling torque ripple, e.g. providing reduced torque ripple
-
- 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
- G05B2219/41—Servomotor, servo controller till figures
- G05B2219/41215—Lookup table for speed as function of actual position error
Definitions
- the present invention relates to a method for suppressing fluctuation in speed of an actuator for suppressing fluctuation in rotational speed of an actuator output shaft caused by an angular transmission error of the wave gear reducer in the actuator provided with the wave gear reducer. is there.
- the present invention also relates to an actuator drive control device that employs the speed fluctuation suppression method.
- the wave gear reducer includes an annular rigid internal gear, an annular flexible external gear, and a wave generator.
- a flexible external gear is wound into an ellipse by a wave generator, and the external teeth located at both ends of the elliptical long axis correspond to the rigid internal gear. Yes A state of being squeezed into the inner tooth portion is formed.
- the wave generator is rotated by the motor, the meshing position of both gears moves in the circumferential direction, and the relative rotation corresponding to the 2n gear difference (n is a positive integer) between the two gears Occurs in the gears.
- the difference in the number of teeth between the two gears is two, the rigid internal gear is fixed, and the flexible external gear rotates as a reduction rotation output element and is connected to the flexible external gear.
- the load-side member is driven to rotate at a low speed.
- the reduction ratio i in this case is expressed by the following equation.
- the actuator drive control device having this configuration generally performs positioning control of the actuator by feedback control.
- the wave gear reducer This error causes an error between the actual positioning position of the actuator output shaft (the output shaft of the wave gear reducer) and the target positioning position. If this error can be compensated, the positioning accuracy of the actuator equipped with the wave gear reducer can be improved.
- Patent Documents 1 and 2 propose a positioning error correction method for an actuator that corrects a positioning error caused by an angle transmission error of a wave gear reducer and performs positioning with high accuracy.
- Patent Document 1 improves the positioning accuracy by adding a correction amount to the position feedback, and Patent Document 2 adds a correction amount to the position command.
- Patent Document 1 Japanese Patent Laid-Open No. 2002-175120
- Patent Document 2 Japanese Patent Laid-Open No. 2003-223225
- an object of the present invention is to propose a speed variation suppressing method for an actuator that can effectively suppress rotational variation of the actuator output shaft caused by an angle transmission error of the wave gear reducer. There is. Another object of the present invention is to propose an actuator drive control device employing this method.
- an actuator output shaft positioning error caused by an angle transmission error of a wave gear reducer is measured in advance in an actuator equipped with a wave gear reducer.
- the speed of the actuator output shaft is calculated using the position information of the detected actuator output shaft corrected by the positioning error, and this is used as the speed feedback value. I use it.
- the speed calculated from the detected position information and corrected based on the positioning error is used as the speed feedback value.
- one of the motor rotation shafts is used. Based on the absolute position of rotation, the positioning error at each rotation angle position of the actuator output shaft is measured, and error correction data of the actuator output shaft is created for each rotation position of the motor rotation shaft. deep. Further, at the time of drive control, the rotational position of the motor rotation shaft is detected, an error correction value assigned to the detected rotational position is obtained from the error correction data, and the error correction value is used to determine the error correction value.
- the speed of the motor rotation shaft is calculated from the value obtained by correcting the rotation position, or the speed of the motor rotation shaft calculated from the rotation position is corrected based on the error correction value, and the obtained speed is It is used as a speed feedback value for feedback control of the actuator output shaft.
- the positioning error of the actuator output shaft is measured for at least one rotation of the actuator output shaft with reference to the absolute position of one rotation of the motor rotation shaft, thereby correcting the error. Create data.
- the error correction data includes correction-less data ⁇ lj as error correction information at each rotation position for one rotation of the motor rotation shaft, or each rotation position for one rotation of the motor rotation shaft. It is possible to use a coefficient sequence of an approximate expression representing an error in.
- the error correction data storage unit storing the error correction data and the motor rotation shaft are attached. Based on the position detector, the detected position of the motor rotating shaft detected by the position detector, and the error correction data, the speed of the motor rotating shaft is calculated, and the speed is used as a speed feedback value. And a feedback control unit that performs feedback control so that the actuator output shaft becomes a target position indicated by position command information.
- the feedback control unit may perform feedback control so that the actuator output shaft has a target speed indicated by speed command information.
- the speed feedback value used for the feedback control of the actuator is The speed component due to the angle transmission error of the wave gear reducer is added to the speed calculated from the detected position of the motor rotation shaft. Therefore, by controlling the speed by feeding back the speed, fluctuations in the rotational speed of the actuator output shaft due to the angle transmission error of the wave gear reducer can be effectively suppressed.
- FIG. 1 is a schematic block diagram showing an example of an actuator drive control apparatus to which the present invention is applied.
- FIG. 3 is a table showing a correspondence table of created correction data.
- FIG. 4 A schematic block diagram showing another example of an actuator drive control device to which the present invention is applied.
- FIG. 1 is a schematic configuration diagram showing a drive control device for an actuator according to the present embodiment.
- the actuator 2 of this example driven by the drive control device 1 includes a motor 3, a wave gear reducer 5 connected to the motor rotating shaft 4, and a position detector 6 capable of detecting the rotational position of the motor rotating shaft 4. It has.
- the output shaft of the wave gear reducer 5, that is, the actuator output shaft 7 is connected to a load (not shown).
- the position detector 6 is a position detector capable of detecting an absolute position, such as a rotary encoder or a potentiometer.
- the drive control device 1 that controls the drive of the actuator 2 includes a feedback control unit 11 that performs feedback control of the actuator 2 so that the actuator 2 has a target position indicated by a position command ⁇ r from the host device side; It has an error correction data storage unit 12 in which correction data C representing a positioning error caused by an angle transmission error of the wave gear reducer 5 is stored.
- the position control unit 13 calculates the speed command cr based on the difference between the position command ⁇ r and the position feedback value ⁇ f from the position detector 6 and supplies it to the speed control unit 14.
- the speed control unit 14 calculates the current command Ir based on the difference between the speed command cor and the speed feedback value cf supplied from the speed calculation unit 15 and supplies the current command Ir to the current amplifier unit 16.
- a motor driving current is supplied to the motor 3 via the current amplifier unit 16.
- the speed calculation unit 15 corrects the position feedback value ⁇ f supplied from the position detector 6 based on the correction data C, and calculates the speed feedback value co f from the corrected value. .
- the correction value C is subtracted or added to the position feedback value ⁇ f to obtain the correction value, and the speed feedback value co f is calculated from the correction value.
- the correction data C in this example is created as follows. First, the positioning error of the motor rotating shaft 4 in the actuator 2 is compressed to one reduction ratio of the speed reducer 5 by the speed reduction of the wave gear speed reducer 5 connected thereto. For example, when the speed ratio of the wave gear reducer 5 is 50 or 100, the positioning error of the motor itself is compressed to 1/50 or 1/100. Therefore, since the positioning error of the actuator 2 is mainly caused by the angle transmission error of the wave gear reducer 5, the one-way positioning accuracy of the actuator 2 is determined by the angle transmission error of the wave gear reducer 5. .
- One-way positioning accuracy means that positioning is performed one after another in a certain rotational direction, and the difference between the angle actually rotated from the reference position and the angle to be rotated is obtained at each position. It represents the maximum value during one rotation of the value.
- the one-way positioning accuracy of the actuator 2 that is, the positioning error of the actuator 2 is measured for one rotation of the actuator output shaft 7 based on the absolute position of the motor rotating shaft 4. For example, when the speed ratio of the wave gear reducer 5 is 1/50, the output shaft 7 rotates once when the motor rotation shaft 4 rotates 50 times.
- this positioning error is measured every time the motor rotating shaft 4 rotates 3 ° based on the output of the position detector 6.
- the measurement point is 120 points (360 ° / 3 °) for the motor rotation shaft 4, and 120 points X (speed ratio) for the actuator output shaft 7.
- the data to be measured is substantially the same when the angular transmission accuracy of the wave gear reducer is used instead of the one-way positioning accuracy.
- the measurement may be performed over one rotation or more of only one rotation of the output shaft 7.
- error data at each measurement point for example, error data at 120 locations
- correction data for one rotation of the motor rotating shaft 4 is obtained. Create C.
- the format of the created correction data C can be the number of correction pulses for error correction for each rotation angle position in one rotation of the motor rotation shaft 4. For example, as shown in Figure 3. As described above, the number of correction pulses measured every 3 ° as described above can be used as a correspondence table assigned to the rotational position of the motor rotating shaft 4 every 3 °.
- correction data for one rotation of the motor rotation shaft 4 is Fourier series expanded to obtain an approximate curve, and each coefficient of the Fourier series representing the approximate curve is stored and held as correction data C. May be.
- the correction data is calculated by applying the stored coefficient to the approximate expression, as shown in FIG. A correction pulse data string may be created.
- the positioning error caused by the angle transmission error of the wave gear reducer 5 is measured in advance, and the motor rotation shaft 4 at each rotational position is measured.
- the correction data C representing the positioning error is created, and in the feedback control loop for motor control, the error correction value for the corresponding rotational position is obtained from the correction data C based on the absolute position of the motor rotation shaft 4,
- the speed feedback value co f is calculated, and the current command Ir for motor drive control is calculated using the speed feedback value co f.
- the calculated speed feedback value includes the speed component due to the angular transmission error of the wave gear reducer 5 to the rotational speed of the motor rotating shaft 4, and speed control is performed using the speed as feedback.
- speed control is performed using the speed as feedback.
- feedback control is performed based on the position command ⁇ r from the host device, but feedback control may be performed based on the speed command cor from the host device.
- FIG. 4 is a schematic configuration diagram showing an example of an actuator drive control device in this case.
- the drive control device 1A has the position control unit 13 omitted, and the other configuration is the same as that of the drive control device 1. Therefore, in the figure, the same reference numerals are given to corresponding parts. Also with this configuration, the same effects as those of the drive control device 1 can be obtained.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Control Of Position Or Direction (AREA)
- Control Of Electric Motors In General (AREA)
- Retarders (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2006/303984 WO2007099635A1 (ja) | 2006-03-02 | 2006-03-02 | アクチュエータの速度変動抑制方法 |
JP2008502621A JP4837724B2 (ja) | 2006-03-02 | 2006-03-02 | アクチュエータの速度変動抑制方法 |
DE112006003785T DE112006003785T5 (de) | 2006-03-02 | 2006-03-02 | Verfahren zum Unterdrücken von Variation der Drehzahl eines Aktuators |
US12/279,145 US20090015188A1 (en) | 2006-03-02 | 2006-03-02 | Method for suppressing variation in speed of actuator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2006/303984 WO2007099635A1 (ja) | 2006-03-02 | 2006-03-02 | アクチュエータの速度変動抑制方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007099635A1 true WO2007099635A1 (ja) | 2007-09-07 |
Family
ID=38458760
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/303984 WO2007099635A1 (ja) | 2006-03-02 | 2006-03-02 | アクチュエータの速度変動抑制方法 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090015188A1 (ja) |
JP (1) | JP4837724B2 (ja) |
DE (1) | DE112006003785T5 (ja) |
WO (1) | WO2007099635A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018212305A1 (ja) * | 2017-05-18 | 2018-11-22 | 川崎重工業株式会社 | モータ制御システム、モータ制御システムの制御方法、及びロボットシステム |
CN109188962A (zh) * | 2018-08-23 | 2019-01-11 | 惠州海卓科赛医疗有限公司 | 一种控制系统的双闭环控制算法 |
WO2019043883A1 (ja) * | 2017-08-31 | 2019-03-07 | 三菱電機株式会社 | アクチュエータの制御装置および制御方法 |
US11171582B2 (en) | 2018-06-13 | 2021-11-09 | Ricoh Company, Ltd. | Drive device for correcting angular deviation between shafts |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8332071B2 (en) * | 2007-08-20 | 2012-12-11 | David Zeltzer | System and method enabling sensorless actuator |
JP6374274B2 (ja) * | 2014-09-04 | 2018-08-15 | 国立大学法人長岡技術科学大学 | 制御装置及び減速機システム |
CN107065583B (zh) * | 2017-04-27 | 2021-06-25 | 台州市吉吉知识产权运营有限公司 | 一种中程通讯连接系统和实现方法 |
US10895866B1 (en) * | 2018-03-08 | 2021-01-19 | Apple Inc. | Position error correction for electric motors |
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JP2002175120A (ja) * | 2000-12-08 | 2002-06-21 | Harmonic Drive Syst Ind Co Ltd | アクチュエータの位置決め誤差補正方法 |
JP2004064833A (ja) * | 2002-07-25 | 2004-02-26 | Toshiba Elevator Co Ltd | 電動機制御装置 |
JP2005110344A (ja) * | 2003-09-29 | 2005-04-21 | Okuma Corp | モータ制御装置 |
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US4792737A (en) * | 1987-06-15 | 1988-12-20 | Performance Controls, Inc. | Circuit for controlling the motion of a moving object |
JP2627530B2 (ja) * | 1987-09-15 | 1997-07-09 | 株式会社エスジー | 位置決め制御装置 |
JPH05193209A (ja) * | 1992-01-17 | 1993-08-03 | Matsushita Electric Ind Co Ltd | 印字装置の紙送り制御方法 |
JP3949353B2 (ja) * | 2000-05-30 | 2007-07-25 | 株式会社リコー | 回転体の駆動制御装置と駆動制御方法及び画像形成装置 |
JP4459463B2 (ja) * | 2001-02-19 | 2010-04-28 | 株式会社ハーモニック・ドライブ・システムズ | アクチュエータの位置決め誤差補正方法 |
JP2003223225A (ja) | 2002-01-30 | 2003-08-08 | Harmonic Drive Syst Ind Co Ltd | 位置決めシステム |
KR100608656B1 (ko) * | 2003-09-20 | 2006-08-04 | 엘지전자 주식회사 | 모터의 속도제어장치 |
EP1596493B1 (de) * | 2004-05-15 | 2008-11-12 | LuK Lamellen und Kupplungsbau Beteiligungs KG | Verfahren zum Messen der Drehzahl eines EC-Motors |
US7068001B2 (en) * | 2004-07-29 | 2006-06-27 | Japan Servo Co., Ltd. | Motor control system |
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2006
- 2006-03-02 WO PCT/JP2006/303984 patent/WO2007099635A1/ja active Application Filing
- 2006-03-02 JP JP2008502621A patent/JP4837724B2/ja active Active
- 2006-03-02 DE DE112006003785T patent/DE112006003785T5/de active Pending
- 2006-03-02 US US12/279,145 patent/US20090015188A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2002175120A (ja) * | 2000-12-08 | 2002-06-21 | Harmonic Drive Syst Ind Co Ltd | アクチュエータの位置決め誤差補正方法 |
JP2004064833A (ja) * | 2002-07-25 | 2004-02-26 | Toshiba Elevator Co Ltd | 電動機制御装置 |
JP2005110344A (ja) * | 2003-09-29 | 2005-04-21 | Okuma Corp | モータ制御装置 |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018212305A1 (ja) * | 2017-05-18 | 2018-11-22 | 川崎重工業株式会社 | モータ制御システム、モータ制御システムの制御方法、及びロボットシステム |
JP2018196266A (ja) * | 2017-05-18 | 2018-12-06 | 川崎重工業株式会社 | モータ制御システム、モータ制御システムの制御方法、及びロボットシステム |
US10919150B2 (en) | 2017-05-18 | 2021-02-16 | Kawasaki Jukogyo Kabushiki Kaisha | Motor control system, control method for motor control system, and robot system |
JP7117827B2 (ja) | 2017-05-18 | 2022-08-15 | 川崎重工業株式会社 | モータ制御システム、モータ制御システムの制御方法、及びロボットシステム |
WO2019043883A1 (ja) * | 2017-08-31 | 2019-03-07 | 三菱電機株式会社 | アクチュエータの制御装置および制御方法 |
JPWO2019043883A1 (ja) * | 2017-08-31 | 2019-11-07 | 三菱電機株式会社 | アクチュエータの制御装置および制御方法 |
US11171582B2 (en) | 2018-06-13 | 2021-11-09 | Ricoh Company, Ltd. | Drive device for correcting angular deviation between shafts |
CN109188962A (zh) * | 2018-08-23 | 2019-01-11 | 惠州海卓科赛医疗有限公司 | 一种控制系统的双闭环控制算法 |
Also Published As
Publication number | Publication date |
---|---|
DE112006003785T5 (de) | 2009-02-12 |
JPWO2007099635A1 (ja) | 2009-07-16 |
JP4837724B2 (ja) | 2011-12-14 |
US20090015188A1 (en) | 2009-01-15 |
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