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PID (proportion integration differentiation) parameter tuning method and tuning system

A parameter setting and parameter technology, which is applied in the field of PID parameter setting method and setting system, can solve the problem that PID setting parameters cannot meet the stable operation requirements of the system

Active Publication Date: 2017-02-22
ZHEJIANG SUPCON TECH
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Problems solved by technology

However, in practical applications, it is found that the mathematical model of the controlled object obtained by using the relay method is an ideal model, and the uncertainty in the actual system, especially in a large system, will cause the parameters of the mathematical model of the controlled object to change, making The obtained PID tuning parameters cannot meet the stable operation requirements of the system

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  • PID (proportion integration differentiation) parameter tuning method and tuning system
  • PID (proportion integration differentiation) parameter tuning method and tuning system
  • PID (proportion integration differentiation) parameter tuning method and tuning system

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Embodiment Construction

[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] The embodiment of the present application provides a PID parameter tuning method, such as figure 1 shown, including:

[0051] S101: Using the relay method to obtain a mathematical model of the controlled object, and obtain initial PID parameters according to the mathematical model;

[0052] S102: Use the initial PID parameters, the PID controller and the controlled object to form a first closed-loop system, and obtain a response curve of the first clos...

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Abstract

The invention discloses a PID (proportion integration differentiation) parameter tuning method and tuning system. The PID parameter tuning method includes the steps: acquiring an initial PID parameter; acquiring an input variable to reflect control effect of a PID controller on a controlled object according to the initial PID parameter; correcting the initial PID parameter according to the control effect. The particular correcting process includes the steps: querying a preset fuzzy rule in a fuzzy set theory domain by the aid of the input variable to obtain a PID correcting parameter in the fuzzy set theory domain; performing defuzzification for the PID correcting parameter in the fuzzy set theory domain to obtain a PID correcting parameter; correcting the initial PID parameter by the aid of the PID correcting parameter to obtain a PID tuning parameter. The initial PID parameter is corrected according to the control effect of the initial PID parameter, so that the controlled object is more accurately controlled by the PID controller.

Description

technical field [0001] The present application relates to the technical field of industrial automation control, and more specifically, relates to a PID parameter setting method and a setting system. Background technique [0002] Proportion-Integral-Differential coefficient (PID) controller is a common feedback loop component in industrial control applications, which consists of proportional unit P, integral unit I and differential unit D. The basis of PID control is proportional control; integral control can eliminate steady-state error, but may increase system overshoot; differential control can speed up the response speed of large inertia system and weaken the overshoot tendency. Before the PID controller is put into use, it is necessary to perform PID parameter tuning to obtain PID tuning parameters, and the PID controller uses the PID tuning parameters to control the operation of the controlled object. [0003] The method of PID parameter tuning in the prior art usually...

Claims

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Application Information

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IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 吴洁芸励东裕蒋荣金谢敏
Owner ZHEJIANG SUPCON TECH
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