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Method, system, device, processor and storage medium for speed feedforward compensation processing based on bus servo control system

A servo control system and feedforward compensation technology, applied in the fields of CNC machining, engraving and milling CNC, and cutting, can solve the problem that the delay of servo drive parameters cannot be accurately controlled, that it cannot take effect immediately and can be compensated, and the final effect has a great impact, etc. problem, to achieve the effect of fast response time, accurate capture, and overcoming static friction

Active Publication Date: 2022-02-08
SHANGHAI WEIHONG ELECTRONICS TECH +2
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] 1. Over-quadrant problem. The feed shaft of the machine tool is affected by the gap and friction of the mechanical transmission parts during the transmission process, which leads to the lag of the servo motor reversal and causes the over-quadrant problem.
If the compensation is performed through the position command, the purpose of immediate effect and compensation cannot be achieved
[0004] 2. Under the control of the bus, the existing technology generally transmits the synchronous data packet of the speed feedforward VFF according to the state of the tool path, and handles the quadrant problem by controlling the amount of feedforward compensation, but the issued speed feedforward VFF command is in the drive The timing of execution in has a great influence on the final effect, and additional parameter debugging is often required
[0005] 3. When the general numerical control system or controller uses the bus speed feed-forward VFF compensation, it controls the sending timing by judging whether the current position command has changed direction. The speed feed-forward VFF is superimposed on the speed command of the speed loop inside the servo driver to compensate. Inside the servo drive, the position command and the feedback deviation need to be processed by the position loop module to obtain the speed command. In this way, the system will send the reverse position command and the speed feed-forward value to the driver when the position is reversed. At this time, the speed The speed of the ring command does not necessarily start to reverse; if the delay compensation of the speed feedforward VFF is performed in the CNC system, the delay cannot be accurately controlled for different servo drive parameters

Method used

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  • Method, system, device, processor and storage medium for speed feedforward compensation processing based on bus servo control system

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[0043] In order to describe the technical content of the present invention more clearly, further description will be given below in conjunction with specific embodiments.

[0044] Before describing the embodiments according to the present invention in detail, it should be noted that in the following, relative terms such as first and second are only used to distinguish one entity or action from another entity or action, and do not necessarily require or Any actual such relationship or order between such entities or actions is implied. The terms "comprising", "comprising" or any other variant are intended to cover a non-exclusive inclusion whereby a process, method, article or apparatus comprising a set of elements includes not only those elements but also other elements not expressly listed elements, or elements inherent in such a process, method, article, or apparatus.

[0045] see figure 1 As shown, the method for implementing speed feedforward compensation processing based...

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Abstract

The invention relates to a method for realizing speed feed-forward compensation processing based on a bus servo control system, wherein the method establishes a speed feed-forward ring buffer in the servo driver and periodically synchronizes speed feed-forward VFF compensation commands to support bus numerical control The system or the controller issues the position control command and the speed feedforward VFF compensation command, adds a cache operation in the speed feedforward ring buffer, and takes out the speed feedforward VFF compensation command and adds it to the speed command for compensation processing, and completes the fetching operate. The present invention also relates to a corresponding system, apparatus, processor and computer readable storage medium. The method, system, device, processor and computer-readable storage medium for speed feed-forward compensation processing based on the bus servo control system of the present invention are adopted, and the precise execution of the speed feed-forward VFF compensation command effectively overcomes the transmission component clearance and The constraint of static friction is conducive to more accurate capture of the driving reverse model during machining.

Description

technical field [0001] The present invention relates to the technical field of numerical control machining, in particular to the technical field of cutting and engraving and milling numerical control, and specifically refers to a method, system, device, processor and computer-readable storage medium for realizing speed feedforward compensation processing based on a bus servo control system. Background technique [0002] The problems that current technology usually has when performing CNC cutting and engraving and milling are as follows: [0003] 1. Over-quadrant problem. The feed shaft of the machine tool is affected by the gap and friction of the mechanical transmission parts during the transmission process, which leads to the over-quadrant problem caused by the reverse lag of the servo motor. If the compensation is performed through the position command, the purpose of immediate effect and compensation cannot be achieved. [0004] 2. Under the control of the bus, the exis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/416
CPCG05B19/4163G05B2219/36521
Inventor 孙玉财苗茂宇李浩牟凤林
Owner SHANGHAI WEIHONG ELECTRONICS TECH
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