WO2023012902A1 - サーボモータ制御装置 - Google Patents
サーボモータ制御装置 Download PDFInfo
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- WO2023012902A1 WO2023012902A1 PCT/JP2021/028817 JP2021028817W WO2023012902A1 WO 2023012902 A1 WO2023012902 A1 WO 2023012902A1 JP 2021028817 W JP2021028817 W JP 2021028817W WO 2023012902 A1 WO2023012902 A1 WO 2023012902A1
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- WIPO (PCT)
- Prior art keywords
- servomotor
- command
- reversal
- servo motor
- adjustment command
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Classifications
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- 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—Program-control systems
- G05B19/02—Program-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 program data in numerical form
- G05B19/19—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 program data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
-
- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/06—Controlling the motor in four quadrants
-
- 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
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/24—Controlling the direction, e.g. clockwise or counterclockwise
-
- 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
- G05B2219/41001—Servo problems
Definitions
- the present invention relates to a servo motor control device.
- the movement of the driven body may differ from that intended due to mechanical play when the direction of rotation of the servomotor is reversed.
- the driving error of the driven body due to the reversal of the rotation direction of the servomotor is called a quadrant projection.
- a servo motor control device is a servo motor control device that controls a servo motor according to an original command, wherein the rotation direction of the servo motor is changed based on the original command or a feedback value from the servo motor.
- a reversal detection unit for detecting a reversal point to be reversed; an adjustment command generation unit for repeatedly generating an adjustment command for repeatedly designating an operation according to the original command of the servomotor in a reversal range including the reversal point; and an output control unit for calculating a control output value to the servomotor, and a deviation of the feedback value from the adjustment command in the reversal range when the servomotor is controlled by the control output value based on the adjustment command.
- a learning control unit that calculates each period of the adjustment command and inputs to the output control unit a correction value that reduces the deviation of the feedback value from the adjustment command.
- quadrant projections can be suppressed in a relatively short period of time.
- FIG. 1 is a block diagram showing the configuration of a drive system including a servomotor control device according to a first embodiment of the present disclosure
- FIG. 2 is a schematic diagram showing a movement path according to a driven body original command and a movement path according to an adjustment command in the servomotor control device of FIG. 1
- FIG. 2 is a flow chart showing the first step of a procedure for generating an actual command by the servomotor control device of FIG. 1
- 3 is a flow chart showing the next step of the procedure for generating an actual command by the servomotor control device of FIG. 1
- 4 is a flow chart showing the final step of the procedure for generating an actual command by the servomotor control device of FIG. 1;
- FIG. 1 is a block diagram showing the configuration of a drive system 1 including a servomotor control device 10 according to the first embodiment of the present disclosure.
- FIG. 1 partially shows the configuration of the servo motor control device 10 in the form of a block diagram.
- all communications indicated by arrows will always be effective, nor that all illustrated components will always be effective.
- the drive system 1 includes a servomotor controller 10, a servo amplifier 20, and a servomotor 30, and the servomotor 30 drives a driven body (not shown).
- a servomotor controller 10 controls a servomotor 30 via a servo amplifier 20 according to an original command.
- 1 shows only one set of servo amplifiers 20 and servo motors 30, the drive system 1 includes a plurality of sets of servo amplifiers 20 and servo motors 30, and the servo motor controller 10 includes: A plurality of sets of servo amplifiers 20 and servo motors 30 are controlled.
- the servo motor control device 10 suppresses quadrant projections caused by reversing the rotation direction of the servo motor 30, and generates an actual command that allows the servo motor 30 to more accurately reproduce the intended operation of the original command. Then, by inputting the generated actual command to the servo amplifier 20, the servo motor 30 is operated.
- the servo motor control device 10 includes a reverse detection section 11 , an adjustment command generation section 12 , an output control section 13 , a learning control section 14 and an actual command generation section 15 .
- the servo motor control device 10 can be realized by causing a computer device having a memory, a processor (CPU), an input/output interface, etc., to execute an appropriate control program. Note that each component of the servo motor control device 10 described above is a classification of the functions of the servo motor control device 10, and may not be clearly classified in terms of physical structure and program structure.
- the reversal detection unit 11 detects a reversal point at which the rotation direction of the servomotor 30 is reversed based on the original command or the feedback value from the servomotor 30 .
- the reversal detector 11 may analyze the original command without actually driving the servomotor 30 to identify a point at which the rotation direction of the servomotor 30 is theoretically reversed. may be executed to actually drive the servomotor 30, and based on the feedback value from the servomotor 30, the point at which the rotation direction of the servomotor 30 is actually considered to have reversed may be specified, and the servomotor may be simultaneously operated on a plurality of criteria. A point at which the rotation direction of the motor 30 is considered to have reversed may be detected as the reversal point.
- the reversal detection unit 11 may determine that the rotation direction of the servomotor 30 is reversed when the differential value of the position specified by the original command or the sign of the speed specified by the original command changes.
- the original command specifies the position
- the sign of the differential value changes
- the original command specifies the speed
- the sign of the value changes
- the rotation direction of the servo motor 30 is reversed in the original command. is intended. Therefore, the reversal point can be detected quickly by specifying the reversal point theoretically based on the original command without actually driving the servomotor 30 .
- the reversal detection unit 11 may determine that the rotation direction of the servomotor 30 is reversed when the sign of at least one of the speed and load torque indicated by the feedback value changes. By executing one cycle of the original command and detecting changes in the signs of the speed and load torque caused by the actual reversal of the rotation direction of the servomotor 30, the reversal point can be detected more accurately.
- the reversal detection unit 11 determines that the rotation direction of the servomotor 30 is reversed when the deviation of at least one of the position, velocity, acceleration, and jerk between the feedback value and the original command exceeds a preset threshold value. may If a difference actually occurs between the command value and the output value of the servomotor 30 after one cycle of the original command is executed, it is considered that the quadrant projection is caused by the reversal of the rotation direction of the servomotor 30 . Also, in this determination method, even if the rotation direction of the servomotor 30 is reversed, it is not detected as a reversal point unless a large quadrant protrusion is generated, so only reversal points that can actually cause problems can be extracted. can be done.
- the adjustment command generator 12 generates an adjustment command that repeatedly designates an operation according to the original command of the servomotor 30 in the reversal range including the reversal point. That is, the adjustment command generated by the adjustment command generation unit 12 is an operation of reciprocating the path specified by the original command for the reversal range including the reversal point, or the path of the reversal range specified by the original command and the reversal range from the end point to the start point. This is a command that designates the operation of circulating a loop-shaped route combined with an arbitrary route to return.
- the number of repetitions of the reciprocating or circulating motion in the adjustment command may be a predetermined number, and is dynamically increased until the deviation of the feedback value from the servomotor 30 with respect to the adjustment command when the adjustment command is executed becomes sufficiently small. You may
- the adjustment command generator 12 may set a preset distance range or time range including the reversal point as the reversal range. Further, the adjustment command generator 12 preferably provides an interface that allows the user to set the distance width or time width of the reversal range. By setting the reversal range to a range having a constant distance width, it is possible to reduce possible variations in the ratio of the width of the reversal range to the width of the quadrant projection, so that the execution time of the adjustment command can be suppressed. Further, by setting the inversion range to a range having a certain time width, the user can intuitively adjust the inversion range, which facilitates the adjustment work.
- the adjustment command generator 12 repeats the reciprocating or circulating motion of the driven body in one reversal range, then moves the driven body to the start point of the next reversal range, and then moves the driven body to the next reversal range.
- the adjustment commands are generated to repeat the reciprocating or circulating motion of the driven body in range.
- the adjustment command can continuously generate an actual command capable of suppressing quadrant projections in a plurality of reversal ranges.
- FIG. 2 shows a case in which a servomotor 30 for moving the driven body in the X direction and a servomotor 30 for moving the driven body in the Y direction are provided.
- the positions of the repetitive motions in the reversal range are shown shifted for the sake of clarity, but in reality they are repeatedly moved along the same path.
- the movement between the reversal ranges can be determined independently of the path designated by the original command indicated by the dashed line in FIG. It can be determined to move along a route that is as simple as possible, such as a linear route. In this way, by moving between the reversal ranges along a simple route regardless of the route specified by the original command, the time required to execute the adjustment command can be shortened.
- the output control unit 13 calculates a control output value for the servo motor 30 (servo amplifier 20) based on the original command, the adjustment command and the actual command.
- the configuration of the output control unit 13 can be the same as that of a conventional servo motor control device that generates a control output for a servo amplifier based on an original command.
- the output control section 13 can be configured to have a position control section 131 and a speed control section 132 .
- the learning control unit 14 calculates the deviation of the feedback value from the servomotor 30 in the reversal range with respect to the adjustment command when the servomotor 30 is controlled by the control output value based on the adjustment command, for each repetition cycle of the reversal range in the adjustment command. , generates a correction value that reduces the deviation of the feedback value from the adjustment command, and inputs it to the output control unit 13 .
- the learning control unit 14 includes a correction amount calculation unit that calculates the correction amount based on the deviation between the current value of the adjustment command and the feedback value, and a correction amount calculation parameter of the correction amount calculation unit based on the deviation for each cycle. and a known configuration having an adjustment unit that adjusts the
- the actual command generation unit 15 Based on the original command and the correction value derived by the learning control unit 14, the actual command generation unit 15 generates a real command that suppresses the quadrant protrusion and more accurately reproduces the intended motion of the original command. As an example, the actual command generation unit 15 adds the correction value output by the learning control unit 14 to the inversion range of the original command when the deviation of the feedback value from the adjustment command becomes sufficiently small due to the execution of the adjustment command. , to generate an actual command that realizes an operation close to the intention of the original command.
- the actual command generation unit 15 may generate the actual command in real time when actually driving the servo motor 30, calculates and stores the generated actual command in advance, and outputs the actual command as necessary. You may
- the servo amplifier 20 feedback-controls the current input to the servomotor 30 according to the control output value input from the servomotor control device 10 .
- the servo amplifier 20 one having a well-known configuration can be used.
- the servo amplifier 20 can be configured to include a current control section 21 and a current amplification section 22 .
- the servomotor 30 is driven by the current output from the servo amplifier 20, and may have a well-known configuration that outputs the rotational position, rotational speed, etc. detected by a rotary encoder or the like as feedback values.
- FIG. 3 to 5 show the actual command generation procedure performed by the servo motor control device 10.
- FIG. A method of generating an actual command performed by the servo motor control device 10 includes a step of generating an adjustment command as shown in FIG. 3, a step of calculating a correction value as shown in FIG. and generating an actual command.
- the generation of the adjustment command consists of a step of confirming the setting as to whether the reversal is to be detected from the original command or from the feed tack value (step S11); a step of detecting (step S12); a step of executing the original command when detection from the feed tack value is selected (step S13); a step of detecting reversal from the feedback value (step S14); and generating an adjustment command if detected (step S15).
- Calculation of the correction value includes a step of executing the adjustment command (step S21) and a step of calculating the correction value with which the deviation converges by the learning control unit (step S22).
- Generating an actual command includes a step of generating an actual command that can suppress quadrant protrusions by correcting the portion where the reversal of the original command is detected with the correction value of the learning control unit (step S31).
- the servo motor control device 10 detects the reversal point at which the rotation direction of the servo motor 30 is reversed based on the original command or the feedback value from the servo motor 30 in the reversal detection unit 11, and the adjustment command generation unit 12 , an adjustment command is generated that repeats the operation according to the original command of the servomotor 30 in the reversal range including the reversal point. Therefore, the servo motor control device 10 can optimize the command by the learning control unit 14 using the adjustment command in a short time, so that the quadrant protrusion can be suppressed in a relatively short time.
- the servo motor control device may be integrated with the servo amplifier. Further, the servomotor control device according to the present disclosure may further include a function of storing an operation program that defines the operation of the servomotor and generating an original command based on the operation program.
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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 Electric Motors In General (AREA)
- Control Of Position Or Direction (AREA)
Abstract
Description
10 サーボモータ制御装置
11 反転検出部
12 調整指令生成部
13 出力制御部
14 学習制御部
15 実指令生成部
20 サーボアンプ
30 サーボモータ
Claims (6)
- サーボモータを原指令に従って制御するサーボモータ制御装置であって、
前記原指令又は前記サーボモータからのフィードバック値に基づいて前記サーボモータの回転方向が反転する反転点を検出する反転検出部と、
前記反転点を含む反転範囲における前記サーボモータの前記原指令に従う動作を繰り返し指定する調整指令を生成する調整指令生成部と、
前記調整指令に基づいて前記サーボモータへの制御出力値を算出する出力制御部と、
前記サーボモータを前記調整指令に基づく前記制御出力値により制御したときの前記反転範囲における前記フィードバック値の前記調整指令に対する偏差を前記調整指令の周期毎に算出し、前記フィードバック値の前記調整指令に対する偏差を小さくするような補正値を前記出力制御部に入力する学習制御部と、
を備える、サーボモータ制御装置。 - 前記反転検出部は、前記原指令が指定する位置の微分値又は前記原指令が指定する速度の符号が変化するときに前記サーボモータの回転方向が反転すると判断する、請求項1に記載のサーボモータ制御装置。
- 前記反転検出部は、前記フィードバック値が示す速度及び負荷トルクの少なくともいずれかの符号が変化するときに前記サーボモータの回転方向が反転すると判断する、請求項1又は2に記載のサーボモータ制御装置。
- 前記反転検出部は、前記フィードバック値と前記原指令との位置、速度、加速度及び加加速度の少なくともいずれかの偏差が予め設定される閾値を超えるときに前記サーボモータの回転方向が反転すると判断する、請求項1から3のいずれかに記載のサーボモータ制御装置。
- 前記調整指令生成部は、前記反転点を含む予め設定される距離範囲又は時間範囲を前記反転範囲とする、請求項1から4のいずれかに記載のサーボモータ制御装置。
- 前記調整指令生成部は、1つの前記反転範囲における前記サーボモータの動作を繰り返してから、次の前記反転範囲の始点に移動し、さらに次の前記反転範囲における前記サーボモータの動作を繰り返すような前記調整指令を生成する、請求項1から5のいずれかに記載のサーボモータ制御装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202180100787.7A CN117693897A (zh) | 2021-08-03 | 2021-08-03 | 伺服电动机控制装置 |
| PCT/JP2021/028817 WO2023012902A1 (ja) | 2021-08-03 | 2021-08-03 | サーボモータ制御装置 |
| DE112021007625.6T DE112021007625T5 (de) | 2021-08-03 | 2021-08-03 | Servomotor-Steuereinheit |
| JP2023539424A JP7691501B2 (ja) | 2021-08-03 | 2021-08-03 | サーボモータ制御装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2021/028817 WO2023012902A1 (ja) | 2021-08-03 | 2021-08-03 | サーボモータ制御装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023012902A1 true WO2023012902A1 (ja) | 2023-02-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2021/028817 Ceased WO2023012902A1 (ja) | 2021-08-03 | 2021-08-03 | サーボモータ制御装置 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7691501B2 (ja) |
| CN (1) | CN117693897A (ja) |
| DE (1) | DE112021007625T5 (ja) |
| WO (1) | WO2023012902A1 (ja) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0384603A (ja) * | 1989-08-29 | 1991-04-10 | Fanuc Ltd | バックラッシュ加速量自動調整方式 |
| JPH1076444A (ja) * | 1996-08-30 | 1998-03-24 | Mitsubishi Electric Corp | オートチューニング機能を備えた数値制御装置 |
| WO2002039574A1 (fr) * | 2000-11-01 | 2002-05-16 | Mitsubishi Denki Kabushiki Kaisha | Servocontroleur et procede associe |
| JP2010009529A (ja) * | 2008-06-30 | 2010-01-14 | Fanuc Ltd | サーボモータの駆動制御装置及び駆動制御方法 |
| JP2010079845A (ja) * | 2008-09-29 | 2010-04-08 | Mitsubishi Electric Corp | 数値制御装置 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6740277B2 (ja) | 2018-04-13 | 2020-08-12 | ファナック株式会社 | 機械学習装置、制御装置、及び機械学習方法 |
-
2021
- 2021-08-03 CN CN202180100787.7A patent/CN117693897A/zh active Pending
- 2021-08-03 DE DE112021007625.6T patent/DE112021007625T5/de active Pending
- 2021-08-03 WO PCT/JP2021/028817 patent/WO2023012902A1/ja not_active Ceased
- 2021-08-03 JP JP2023539424A patent/JP7691501B2/ja active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0384603A (ja) * | 1989-08-29 | 1991-04-10 | Fanuc Ltd | バックラッシュ加速量自動調整方式 |
| JPH1076444A (ja) * | 1996-08-30 | 1998-03-24 | Mitsubishi Electric Corp | オートチューニング機能を備えた数値制御装置 |
| WO2002039574A1 (fr) * | 2000-11-01 | 2002-05-16 | Mitsubishi Denki Kabushiki Kaisha | Servocontroleur et procede associe |
| JP2010009529A (ja) * | 2008-06-30 | 2010-01-14 | Fanuc Ltd | サーボモータの駆動制御装置及び駆動制御方法 |
| JP2010079845A (ja) * | 2008-09-29 | 2010-04-08 | Mitsubishi Electric Corp | 数値制御装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7691501B2 (ja) | 2025-06-11 |
| CN117693897A (zh) | 2024-03-12 |
| DE112021007625T5 (de) | 2024-02-29 |
| JPWO2023012902A1 (ja) | 2023-02-09 |
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