PID system and automatic parameter adjusting method thereof

A parameter adjustment and automatic adjustment technology, which is applied in the field of PID system and its parameter setting, can solve problems such as complex PID parameters, and achieve the effect of improving system efficiency and simplifying complex processes

Active Publication Date: 2017-05-31
北京鸿智电通科技有限公司
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Problems solved by technology

[0005] It can be seen that the determination of PID parameters in the prior art is relatively complicated, and often requires experienced engineers to quickly obtain accurate and usable parameters

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  • PID system and automatic parameter adjusting method thereof
  • PID system and automatic parameter adjusting method thereof
  • PID system and automatic parameter adjusting method thereof

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Embodiment Construction

[0040] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure, and to fully convey the scope of the present disclosure to those skilled in the art.

[0041] The biggest feature of the PID parameter automatic adjustment method of the present invention is that the values ​​of the three PID parameters are not fixed, and the three PID parameters are adjusted in real time according to the stability of the system. The three parameters of PID are proportional coefficient, integral coefficient and differential coefficient. Before the system is initialized, it is necessary to configure ...

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Abstract

The invention discloses a PID system and an automatic parameter adjusting method thereof. The method includes the steps of firstly, configuring a PID system error threshold; secondly, configuring a PID parameter adjusting step length; thirdly, performing error updating; fourthly, comparing errors with the threshold; fifthly, determining the used step length of PID parameters; sixthly, updating the PID parameters; seventhly, acquiring a PID control value according to the PID parameters, and returning to the third step. The PID system comprises a measured value acquiring module, a storage, an error calculation module, an error threshold and PID parameter adjusting step length configuring table, a current-period parameter step length determining module, a current-period parameter calculation module, a PID control value calculation module and a PID control value output module. By the automatic parameter adjusting method applicable to various application occasions, automatic PID parameter adjusting can be achieved.

Description

technical field [0001] The invention relates to an automatic control technology, in particular to a PID system and a parameter setting method thereof. Background technique [0002] At present, the proportional-integral-derivative (PID) closed-loop control system is an important control method in the field of industrial control. In the PID control system, the three parameters P, I, and D are better values ​​obtained through calculation and testing, and these parameters remain unchanged during the operation of the PID system. There are two main types of PID parameter tuning: theoretical calculation tuning and engineering tuning. [0003] Theoretical calculation and tuning method is a commonly used method to determine the three parameters of PID in PID system. It is mainly based on the mathematical model of the system to determine the controller parameters through theoretical calculations. The theoretically calculated parameter data usually cannot be used directly, and must ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B11/42
CPCG05B11/42
Inventor 刘浩淼钟裕捷王诺李仕炽李仕胜
Owner 北京鸿智电通科技有限公司
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