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Liquid level fuzzy controller and working method thereof

A fuzzy controller and fuzzy control technology, applied in the field of control, can solve problems such as property loss, equipment damage, casualties, etc., and achieve the effects of low price, small damage and high reliability

Inactive Publication Date: 2012-02-15
UNIV OF SHANGHAI FOR SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Recently, there have been serious industrial accidents such as equipment damage caused by improper liquid level control, which not only caused a lot of property losses, but also caused casualties from time to time.

Method used

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  • Liquid level fuzzy controller and working method thereof
  • Liquid level fuzzy controller and working method thereof
  • Liquid level fuzzy controller and working method thereof

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Embodiment Construction

[0029] The fuzzy controller works according to certain language rules, and these control rules are based on summarizing the operator's control experience. And most fuzzy logic reasoning methods use Mamdani's maximin reasoning method. To implement fuzzy control, it must be implemented in a digital computer with a certain algorithm. The purpose of these fuzzy control algorithms is to obtain the corresponding precise control value through the algorithm process of fuzzy reasoning from the continuous and precise input. Fuzzy control algorithm has many realization forms, and the commonly used methods include relational matrix method of synthetic reasoning, look-up table method of synthetic reasoning, analytic formula method of synthetic reasoning, intensity transfer method and consequential function method, etc. In the actual system, usually the one-chip computer adopts the look-up table method of synthetic reasoning to realize the fuzzy control. The design steps of fuzzy controlle...

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Abstract

The invention relates to a liquid level fuzzy controller and a working method thereof. A controller acquires a present liquid level value through a sensor, and calculates a deviation E of a preset liquid level value and a deviation changing rate EC; according to a requirement of fuzzy control, the deviation E and the deviation changing rate EC are subjected to standardization and fuzzification processing, and according to a processing result, the deviation E and the deviation changing rate EC are converted into corresponding domain values M and N in a fuzzy set; according to the values of M and N, a fuzzy control response table is checked out, and an output control quantity is obtained. The liquid level fuzzy controller has the advantages of a low price, a high integrated level, simple structure, high reliability, a strong processing function, simplified operation, high stability, strong anti-interference and the like. Not only is a requirement of liquid level control in industrial production satisfied, but also damage of devices such as a boiler the like is reduced and personal security of work personnel is ensured.

Description

technical field [0001] The invention relates to a control technology, in particular to a liquid level fuzzy controller. Background technique [0002] The control of liquid level is very important in industries such as petrochemical industry. It not only requires high reliability, but also with the development of our country's economy, the precision of liquid level control is getting higher and higher. Recently, there have been serious industrial accidents such as equipment damage caused by improper liquid level control, which not only caused a lot of property losses, but also caused casualties. Therefore, the accuracy and reliability of liquid level control are getting more and more attention. Contents of the invention [0003] The present invention is aimed at the problem of high requirements for liquid level control, and proposes a liquid level fuzzy controller and working method, combined with liquid level detection, analog-to-digital conversion, LED display, solenoid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D9/12G05B13/04
Inventor 姜纪光周洁心王春蕾崔志超李菲胡羽杨青青邓兆翠黄贞辉黄金霞
Owner UNIV OF SHANGHAI FOR SCI & TECH
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