Servo self-tuning method based on frequency domain analysis

A frequency domain analysis and self-tuning technology, applied in the field of CNC servo system, can solve the problems of long time consumption, large limitations, and not allowing the servo system to move back and forth frequently, and achieve the effect of long solution time

Pending Publication Date: 2021-09-03
南京达风数控技术有限公司
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Problems solved by technology

[0004] ①The servo system needs to move back and forth, which takes a long time;
[0005] ② In the case of limited travel, or where the mechanical structure does not allow the servo system to move back and forth frequently, the limitations are very large

Method used

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  • Servo self-tuning method based on frequency domain analysis
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  • Servo self-tuning method based on frequency domain analysis

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Embodiment Construction

[0041] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will now be further described in detail in conjunction with the accompanying drawings. These drawings are all simplified schematic diagrams, and only illustrate the basic structure of the present invention in a schematic manner, so they only show the relevant components of the present invention.

[0042] According to the technical solution of the present invention, without changing the spirit of the present invention, those skilled in the art can propose multiple structural modes and implementation modes that can be replaced with each other. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or restriction on the technical solution of the present ...

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Abstract

The invention relates to the technical field of numerical control servo systems and particularly relates to a frequency domain analysis-based servo self-tuning method. The method comprises the following steps of acquiring a mechanical frequency characteristic curve through frequency sweeping, acquiring load inertia, and respectively inputting frequency sweeping signals into a speed ring inlet and a position ring inlet in a servo system; frequency characteristic curves under different gains being obtained through frequency sweeping, gain parameters corresponding to the optimal PM and GM being found, and the group of parameters being determined as servo system parameters. According to the method, the system inertia is obtained through the frequency domain analysis method, a problem that frequent back-and-forth movement is needed in the time domain is avoided, the optimal control parameters are searched through the frequency domain analysis method, and a problem that the time for searching the optimal parameters in the time domain is long is solved.

Description

technical field [0001] The invention relates to the technical field of numerical control servo systems, in particular to a servo self-tuning method based on frequency domain analysis. Background technique [0002] The rapid progress of modern industrial technology has promoted the continuous development of CNC machine tool processing technology in the direction of high speed and high precision. The servo system is an important part of the CNC machine tool, and the optimization of the servo control performance plays a vital role in improving the machining accuracy and production efficiency. [0003] At present, foreign and domestic related companies have launched servo drive products with automatic control tuning, but the tuning process of these products is basically carried out in the time domain. In this case, the servo system needs to go back and forth continuously during the entire tuning process motion to determine the optimal control parameters. This tuning method has...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P6/08
CPCH02P6/08
Inventor 陈小波
Owner 南京达风数控技术有限公司
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