WO2022202852A1 - サーボ制御装置 - Google Patents
サーボ制御装置 Download PDFInfo
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- WO2022202852A1 WO2022202852A1 PCT/JP2022/013298 JP2022013298W WO2022202852A1 WO 2022202852 A1 WO2022202852 A1 WO 2022202852A1 JP 2022013298 W JP2022013298 W JP 2022013298W WO 2022202852 A1 WO2022202852 A1 WO 2022202852A1
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- WIPO (PCT)
- Prior art keywords
- command
- control device
- repeatable
- servo control
- repeatability
- Prior art date
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- 230000003252 repetitive effect Effects 0.000 description 26
- 238000010586 diagram Methods 0.000 description 17
- 238000012545 processing Methods 0.000 description 7
- 238000003754 machining Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000007514 turning Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
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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
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/041—Function-oriented details
-
- 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
- G05B19/182—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 the machine tool function, e.g. thread cutting, cam making, tool direction control
-
- 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
- G05B19/19—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 programme 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
Definitions
- the present invention relates to a servo control device, and more particularly to a servo control device that performs motor control based on commands including repetitive motion commands.
- the control command includes a non-repeatable movement command and, if necessary, a repetitive command such as a reciprocating vibration command (oscillation command) superimposed.
- a repetitive command such as a reciprocating vibration command (oscillation command) superimposed.
- Patent Document 1 describes a technique for incorporating an oscillating motion into the machining operation of a tool in order to shred chips generated by turning in the control of a machine tool that performs threading by turning a workpiece.
- a repeatable command related to the swinging motion in the swinging amplitude and swinging direction appropriate for chip shredding is added to the movement command for relatively moving the workpiece and the tool for turning (
- a control technique for a machine tool that superimposes is described.
- Patent Document 2 relates to a control device for a machine tool that performs oscillating cutting.
- the commands for the relative oscillation of the workpiece and the tool are superimposed.
- the tool and workpiece are relatively oscillated in the direction along the machining path, and if the machining conditions indicate machining by simultaneous interpolation operations of a plurality of feed axes, the oscillating direction is changed with respect to the machining path. , or stop rocking.
- JP 2019-185355 A Japanese Patent Application Laid-Open No. 2020-9248
- the waveform of the swing command is a sine wave or a triangular wave when generating the swing command (repeated command) in the control device (servo control device).
- the oscillating command is a free-form oscillating command whose waveform has a complicated shape and cannot be expressed by the feature quantity alone. Not supported.
- an upper controller creates a swing command (a command with repeatability) and sends the created swing command to a controller (servo controller).
- the waveform is assumed to be a cosine wave, and it does not correspond to a command of a free-form waveform that cannot be expressed only by the feature amount.
- the present invention provides a control command in a machine tool control device in which a repeatable command is superimposed on a normal movement command. It is an object of the present invention to provide a servo control device capable of coping with a free-form waveform that cannot be expressed only by a feature quantity.
- the servo control device of the present disclosure is a servo control device that controls a servo motor.
- a repeatable command creation unit for creating and outputting a repeatable command; and acquiring a movement command from the upper control device, and superimposing the repeatable command output by the repeatable command creation unit on the movement command. and a command superimposing unit.
- the servo control device of the present disclosure when performing servo control, as the control command, it is possible to cope with the case where the waveform of the repeatable command is a free shape that cannot be represented only by the feature amount. Furthermore, by superimposing a free-form repetitive command that cannot be expressed only by the feature quantity onto the basic movement command to form a waveform of the superimposed command of a free shape, processing accuracy and processing efficiency are further improved. is requested, and it is possible to respond to the request even if a more detailed response than at present is required.
- FIG. 1 is a control block diagram of a servo control device according to an embodiment of the present disclosure
- FIG. [0014] Fig. 5 is a diagram illustrating normal movement commands and repeatable commands of the present disclosure
- FIG. 11 shows a repeatable command (high frequency repeatable command)
- FIG. 10 is a diagram showing a trapezoidal command, which is an example of a non-repetitive command.
- FIG. 4 is a diagram showing a command composed of a linear acceleration/deceleration portion and a constant speed portion, which is an example of a non-repeatable command;
- Fig. 10 shows a low frequency repeatable command;
- FIG. 4 is a diagram showing a period T1 in repetitive commands;
- FIG. 10 is a diagram showing phase data corresponding to repetitive commands;
- FIG. 10 is a diagram equivalent to phase data corresponding to repetitive commands;
- FIG. 4 is a diagram showing phase data for each servo control cycle;
- FIG. 10 is a diagram showing a repeatable command in the example; It is a figure which shows the method of creating the command data for 1 period of the command with repeatability in an Example. 1 is a flow diagram illustrating an embodiment of the disclosure;
- FIG. 10 is a diagram equivalent to phase data corresponding to repetitive commands;
- FIG. 4 is a diagram showing phase data for each servo control cycle;
- FIG. 10 is a diagram equivalent to phase data corresponding to repetitive commands;
- FIG. 4 is a diagram showing phase data for each servo control cycle;
- FIG. 10 is a diagram showing a repeatable command in the example
- FIG. 1 is a control block diagram of a servo control device according to one embodiment of the present disclosure.
- the host control device 20 notifies the servo control device 10 of data related to movement commands and repeatability commands (repeated commands),
- the servo control device 10 a repeatability command and phase data are created, the repeatability command is superimposed on the movement command, learning control based on the phase data is applied, and position/speed/current control is applied. After that, it is sent to the amplifier 30, and the motor 40 is driven and controlled by its output.
- the servo control device 10 includes a repeatability command/phase data creation unit 11 , a learning control unit 12 , a position/speed/current control unit 13 , a first adder 14 and a second adder 15 .
- a normal movement command signal such as a non-repeatable movement command is sent from the host control device 20 to the first adder 14 of the servo control device 10, and data relating to the repetitive command signal is sent to the first adder 14 of the servo control device 10. It is sent to the phase data creating section 11 .
- Typical movement commands include, for example, basic design commands that determine the shape of the workpiece.
- the repeatability command/phase data creation unit 11 creates a repeatability command and sends it to the first adder 14 , and also creates phase data for each servo cycle and sends it to the learning control unit 12 .
- the "data relating to repetitive command signals", "preparation of phase data” and “preparation of repetitive commands” will be described later in detail.
- the first adder 14 adds (superimposes) the repeatability command generated by the repeatability command/phase data generation unit 11 to the movement command sent from the host controller 20 to form a superimposed command. At the same time, the deviation between this superimposed command and the signal fed back from the motor 40 is obtained and sent to the learning control section 12 and the second adder 15, respectively.
- the learning control unit 12 performs learning control for the deviation between the superimposed command and the feedback signal obtained by the first adder 14 based on the phase data created by the repeatability command/phase data creating unit 11. done.
- the learning control based on the phase data obtains the amount of correction from the integrated deviation up to one cycle before and corrects the input command (deviation) to improve followability to the periodic command.
- the technology itself is conventionally known and will not be described in detail here. By applying learning control, highly followable and highly accurate motion becomes possible.
- the position/speed/current control unit 13 calculates an appropriate drive voltage for the motor 40 from the input position command, speed command, and current command. be done.
- the host control device 20 outputs to the servo control device 10 data relating to a normal movement command 21 such as a non-repeating movement command and a repetitive command 22 .
- a normal movement command 21 such as a non-repeating movement command and a repetitive command 22 .
- the cycle of the repeatable command waveform and the command data for one cycle are output from the host control device 20 to the servo control device 10 as "data related to the repeatable command 22".
- the reason why one cycle of command data is output is that it is possible to correspond to commands of free-form waveforms that cannot be expressed only by feature values, instead of conventional sine waves, triangular waves, and rectangular waves.
- a repetitive command is superimposed with a normal movement command in the direction perpendicular to the direction of the reciprocating motion by the repetitive command, and the reciprocating motion is performed by a constant amount in the vertical direction for each cycle. It depicts an operation (raster operation) that fills a certain area by moving it.
- a repeatable command is a command that repeats a reciprocating motion, for example, a command with a waveform (such as a sine wave) shown as a representative diagram on the right side of FIG.
- FIG. 3 shows a high-frequency one as an example.
- a normal movement command corresponds to either a non-repeatable command, a low-frequency repeatable command, or a combination thereof.
- Non-repeatable commands include, for example, a trapezoidal command shown as a representative diagram on the right side of FIG. 2, and a command consisting of a linear acceleration/deceleration section and a constant speed section shown as a representative diagram in FIG. .
- Low-frequency repetitive commands include, for example, commands with waveforms (low-frequency sine waves, etc.) shown as representative diagrams in FIG. It is a low frequency command compared to .
- a command obtained by adding a non-repeating command and a low-frequency repetitive command has, for example, a waveform shown as a representative diagram in FIG.
- FIG. 7 shows the period T1 in a repetitive command.
- the vertical axis represents the commanded position (distance), and the horizontal axis represents the elapsed time t.
- the commanded position returns to the original commanded position every time T1 passes due to the repeatability (reciprocity) of the command, and it can be said that the cycle is T1.
- Fig. 8 shows the phase data corresponding to the repeatable command in Fig. 7.
- the vertical axis represents the phase and the horizontal axis represents the elapsed time t.
- a constant phase advances every time a certain time elapses, and every time the period T1 elapses and the phase advances 360°, the original (0°) phase back to That is, the phase is proportional to time t within the period of period T1. This situation is shown in FIG.
- the phase returns to the original (0°) phase every time the period T1 elapses and the phase advances by 360°, but it is also possible to further add the phase from 360°. .
- the phase is added from 360° as time elapses.
- the phase is proportional to time t over the entire period, not limited to the period of period T1. This situation is shown in FIG.
- the vertical axis represents the phase and the horizontal axis represents the elapsed time t.
- FIGS. 11 and 12 show an example of a command with a free-form waveform that cannot be expressed only by a characteristic quantity such as amplitude as a repeatable command.
- FIG. 12 shows the displacement (position) in the command wave for each servo cycle Ts by extracting only one cycle of command data from the repetitive command in FIG. 12 from the repetitive command shown in FIG. 11 is sent to the servo control device 10.
- a repetitive command cycle and command data for one cycle are received from the host control device (step S1).
- step S1 By receiving data for one cycle of a repetitive command in its entirety, it is possible to respond to a command with a free-form waveform that cannot be expressed only by the feature quantity.
- phase data that serves as a reference for creating a repeatability command and correction data is created (step S2).
- a repeatable command is created as a repeatable command as shown in FIG. 11 by connecting command data for one cycle of a repeatable command as shown in FIG. 12 for each cycle. be.
- repeatability commands are superimposed on normal movement commands. It should be noted that superposition of commands is started, interrupted, or terminated based on a signal from the host controller (step S3).
- the deviation between the superimposed command obtained by superimposing the repeatability command on the normal movement command and the signal fed back from the motor is obtained, and the motor is driven and controlled based on the obtained deviation signal. be done.
- step S4 learning control is applied based on the phase data created in step S3 (step S4), and this flow ends.
- the cycle of the repetitive command and the command data for one cycle are obtained from the host control device. It can also deal with the case of a free shape that cannot be expressed. Furthermore, by superimposing a free-form repetitive command that cannot be expressed only by the feature quantity onto the basic movement command to form a waveform of the superimposed command of a free shape, processing accuracy and processing efficiency are further improved. is requested, and even if a more detailed response than at present is required, it has a remarkable effect that it is possible to realize the response to the request.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
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Abstract
Description
[数1]
θ(t)=360×(t/T1)・・・式(1)
[数2]
θ(Ts)=360×(Ts/T1)・・・式(2)
となる。
[数3]
θ(n)=360×(n・Ts/T1)・・・式(3)
となる。この様子を図10に示す。縦軸は位相を表し、横軸は経過した時間tを表す。
11 繰返し性指令・位相データ作成部
12 学習制御部
13 位置・速度・電流制御部
14 第1加算器
15 第2加算器
20 上位制御装置
21 通常の移動指令
22 繰り返し性のある揺動指令
30 アンプ
40 モータ
Claims (5)
- サーボモータの制御を行うサーボ制御装置において、
上位制御装置から、繰り返し性指令波形の周期、及び、一周期分の指令データを取得し、繰返し性のある指令を作成し出力する繰返し性指令作成部と、
前記上位制御装置から移動指令を取得し、前記繰返し性指令作成部が出力する繰返し性のある指令を前記移動指令に重畳する指令重畳部と、
を備えるサーボ制御装置。 - 前記移動指令は、繰り返し性のない指令、低周波の繰り返し性のある指令、又は繰り返し性のない指令と低周波の繰り返し性のある指令の足し合わせの指令のいずれかである請求項1に記載のサーボ制御装置。
- 前記繰返し性指令作成部はさらに、
前記上位制御装置から取得した、前記繰返し性のある指令の周期または周波数のデータと、前記サーボ制御装置のサーボ制御周期から、前記サーボ制御周期ごとの位相データを作成する位相データ作成部を備える、請求項1又は2に記載のサーボ制御装置。 - 前記位相データ作成部で作成された位相データをもとに学習制御を行う学習制御部をさらに含む、請求項3に記載のサーボ制御装置。
- 前記指令重畳部は、前記上位制御装置からの信号に基づき、指令の重畳を開始または中断もしくは終了する請求項1~4のいずれかに記載のサーボ制御装置。
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JP2023509220A JPWO2022202852A1 (ja) | 2021-03-26 | 2022-03-22 | |
DE112022000526.2T DE112022000526T5 (de) | 2021-03-26 | 2022-03-22 | Servosteuervorrichtung |
US18/259,754 US20240061389A1 (en) | 2021-03-26 | 2022-03-22 | Servo control device |
CN202280022064.4A CN117099060A (zh) | 2021-03-26 | 2022-03-22 | 伺服控制装置 |
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JP (1) | JPWO2022202852A1 (ja) |
CN (1) | CN117099060A (ja) |
DE (1) | DE112022000526T5 (ja) |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2015140906A1 (ja) * | 2014-03-17 | 2015-09-24 | 三菱電機株式会社 | 数値制御装置 |
WO2017141804A1 (ja) * | 2016-02-17 | 2017-08-24 | 株式会社神戸製鋼所 | 溶接装置及び溶接装置の制御方法 |
JP2018181210A (ja) * | 2017-04-20 | 2018-11-15 | ファナック株式会社 | 揺動切削を行う工作機械の制御装置 |
JP2018180633A (ja) * | 2017-04-04 | 2018-11-15 | ファナック株式会社 | 揺動切削を行う工作機械の制御装置 |
JP2019185260A (ja) * | 2018-04-05 | 2019-10-24 | ファナック株式会社 | 表示装置 |
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JP6784717B2 (ja) | 2018-04-09 | 2020-11-11 | ファナック株式会社 | 工作機械の制御装置 |
JP6763917B2 (ja) | 2018-07-10 | 2020-09-30 | ファナック株式会社 | 工作機械の制御装置 |
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- 2022-03-22 JP JP2023509220A patent/JPWO2022202852A1/ja active Pending
- 2022-03-22 DE DE112022000526.2T patent/DE112022000526T5/de active Pending
- 2022-03-22 US US18/259,754 patent/US20240061389A1/en active Pending
- 2022-03-22 CN CN202280022064.4A patent/CN117099060A/zh active Pending
- 2022-03-22 WO PCT/JP2022/013298 patent/WO2022202852A1/ja active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015140906A1 (ja) * | 2014-03-17 | 2015-09-24 | 三菱電機株式会社 | 数値制御装置 |
WO2017141804A1 (ja) * | 2016-02-17 | 2017-08-24 | 株式会社神戸製鋼所 | 溶接装置及び溶接装置の制御方法 |
JP2018180633A (ja) * | 2017-04-04 | 2018-11-15 | ファナック株式会社 | 揺動切削を行う工作機械の制御装置 |
JP2018181210A (ja) * | 2017-04-20 | 2018-11-15 | ファナック株式会社 | 揺動切削を行う工作機械の制御装置 |
JP2019185260A (ja) * | 2018-04-05 | 2019-10-24 | ファナック株式会社 | 表示装置 |
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JPWO2022202852A1 (ja) | 2022-09-29 |
CN117099060A (zh) | 2023-11-21 |
DE112022000526T5 (de) | 2023-11-23 |
US20240061389A1 (en) | 2024-02-22 |
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