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Control system PI parameter engineering setting method based on Bode diagram

A technology of control system and engineering adjustment, applied in the field of control system based on Bode diagram, can solve the problems of long debugging process and bad adjustment, and achieve the effect of improving control performance

Pending Publication Date: 2022-07-12
南京轻机包装机械有限公司
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Problems solved by technology

The theoretical calculation of PID parameters involves many fields and requires rich experience in on-site control. The "trial and error" debugging process is long and may not be adjusted properly.

Method used

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  • Control system PI parameter engineering setting method based on Bode diagram
  • Control system PI parameter engineering setting method based on Bode diagram
  • Control system PI parameter engineering setting method based on Bode diagram

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Embodiment Construction

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] see Figure 1 to Figure 7 , the first step: establish the mathematical model of the control object system, draw the system Bode diagram; take the current loop control of the permanent magnet synchronous motor in the 3MW wind turbine as an example.

[0044] Obtain the stator winding parameters L and R of the permanent magnet synchronous motor, and establish a mathematical model. The establishment of the model can be done throu...

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Abstract

The invention discloses a control system PI parameter engineering setting method based on a Bode diagram, and the method comprises the steps: 1, building a mathematical model of a control object system, and drawing the Bode diagram of the system, and 2, finding the cut-off frequency of the control object system and the gain corresponding to the optimal phase margin in the Bode diagram; 3, searching a frequency point where the optimal phase margin Pm of the control object system is equal to 45 degrees and a corresponding gain in the Bode diagram; 4, calculating and setting control parameters Kp, Ki / Ti in a PI link; according to the control system PI parameter engineering setting method based on the Bode diagram, it can be seen from a current closed-loop step response curve that PI parameter matching is carried out on the optimal phase margin PM = 45 degrees on the Bode diagram, and the control performance of an original system can be improved; the method is visual, simple and worthy of popularization.

Description

technical field [0001] The invention belongs to the technical field of Bode diagram-based control systems, in particular to a Bode diagram-based control system PI parameter engineering tuning method. Background technique [0002] In the control system, the classic control method PID is widely used and is very effective, but the adjustment of the control parameters of the PID control link has always caused a great headache for engineers. Expert knowledge of automatic control principles is required. Therefore, in the actual application process, the operating parameters of the PID control link are divided into two groups. One is to perform theoretical calculations based on the control model of the entire control system. , according to the response result of the system to judge whether the PID parameters are suitable. The theoretical calculation of PID parameters involves many fields, and also requires rich experience in on-site control. The "trial and error" debugging process...

Claims

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Application Information

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IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 曾敏李陈灵李壮王哲睿缪张鹏
Owner 南京轻机包装机械有限公司
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