Temperature control method

A temperature control method and control system technology, applied in the field of temperature controllers, can solve the problems of high control precision, PID initial value control performance is greatly affected, difficult to achieve, etc., to achieve good control effect and excellent system performance

Inactive Publication Date: 2018-04-10
昆山艾派科技有限公司
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Problems solved by technology

As the core technology of the temperature measurement controller, the temperature control algorithm has received great attention from scholars. Since the traditional single PID (proportion, integral, derivative) algorithm can no longer meet the control requirements, various Parameter self-tuning PID algorithm was born
The self-tuning PID algorithm based on model parameter identification has been widely used in indus

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Example Embodiment

[0029] Please refer to Figure 1 to Figure 4 , The present invention relates to a temperature control method, including the following steps:

[0030] (1) The control system model G(s) can be described by a first-order inertial lag link with interference and parameter uncertainty, and e and e& are defined as the deviation between the temperature setting value and the actual measurement value and the deviation change rate;

[0031] (2) The relay feedback method is used to identify the model parameters, and the PID initial value of the fuzzy PID is obtained based on the Z-N formula method;

[0032] (3) Based on the optimized fuzzy rules, the PID parameters are adaptively adjusted on the basis of the initial values ​​according to the deviation e and the deviation change rate e&; and

[0033] (4) Determine the quantization factor of fuzzy PID according to the idea of ​​changing universe.

[0034] In the step (1), the formulas of the deviation e and the system model G(s) are:

[0035] e=sv-pv...

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Abstract

The invention provides a temperature control method. The method comprises the following steps of (1) controlling a system model G(s) to define e and e& to be the deviation and the deviation change rate between a temperature preset value and an actual measurement value respectively through a first-order inertia hysteresis link having the interference and parameter uncertainty; (2) identifying modelparameters by adopting the relay feedback method, and obtaining a PID (proportion integration differentiation) initial value of the fuzzy PID based on a Z-N formula method; (3) based on an optimizedfuzzy rule, conducting the self-adaptive adjustment on PID parameters on the basis of the initial value according to the deviation e and the deviation change rate e&; and (4) determining a quantization factor of the fuzzy PID according to the variable-theory domain thought. According to the invention, the optimal temperature control performance is realized.

Description

technical field [0001] The invention relates to the field of temperature controllers, in particular to a temperature control method. Background technique [0002] Temperature is one of the basic parameters in the industrial production process, because the measurement and control effect of temperature is often closely related to various technical and economic indicators such as production efficiency, production safety, and energy management. As temperature measurement controllers are widely used in industrial environments, the requirements for temperature control accuracy, stability, and reliability are getting higher and higher. As the core technology of the temperature measurement controller, the temperature control algorithm has received great attention from scholars. Since the traditional single PID (proportion, integral, derivative) algorithm can no longer meet the control requirements, various The parameter self-tuning PID algorithm was born. The self-tuning PID algor...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 景余祥
Owner 昆山艾派科技有限公司
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