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Control method for neutral system based on interval two-type T-S model

A technology of interval type 2 and control method, which is applied in the direction of adaptive control, general control system, control/regulation system, etc.

Inactive Publication Date: 2019-07-26
HANGZHOU DIANZI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the literature on the combination of neutral type system and interval type 2 T-S model is still blank.

Method used

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  • Control method for neutral system based on interval two-type T-S model
  • Control method for neutral system based on interval two-type T-S model
  • Control method for neutral system based on interval two-type T-S model

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Embodiment

[0230] Embodiment: The present invention is mainly aimed at controlling the refining process of chemical reactors in petroleum refineries. The proposed control method is clear in thinking, reasonable in structure, and easy to implement in engineering. Consider the following mathematical model of a chemical reactor in a petroleum refinery:

[0231]

[0232]

[0233] Where t is time (unit: min), x 1 ,x 2 Respectively, the deviation of the standard value of reactants A and B (unit: kg), δF A ,δF B Respectively, the deviation of the standard feeding speed of raw materials A and B (unit: kg / min), σV R Indicates the deviation of the mass of the chemical reactor (unit: kg), τ, h, r are delay times, and they are all fixed values ​​(unit: min), a i ,b i ,c i , d i ,e j (i=1,2,3,4; j=1,2) are known engineering parameters.

[0234] The process equation of chemical reactor in petroleum refinery is described by fuzzy rules as follows:

[0235] Rule 1: THEN

[0236]

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Abstract

The invention relates to a control method for a neutral system with distributed time delay based on an interval two-type T-S model. The method firstly determines a mathematical model of a chemical reactor of the petroleum refinery, secondly converts the mathematical model into an interval two-type T-S fuzzy model, designs a T-S fuzzy controller by the parallel distributed compensation method, finally determines a stability condition of the interval two-type T-S fuzzy system, and transforms the stability condition into a linear matrix inequality to obtain a control gain. The control method provided by the invention utilizes the interval two-type T-S model to describe the chemical reactor refining process in the petroleum refinery, and the interval two-type T-S fuzzy set has advantages overthe one-type fuzzy set in the processing system uncertainty, and at the same time has lower computational complexity than the two-type fuzzy set. Therefore, modeling the system using functions of theinterval two-type fuzzy set not only makes the system description more accurate, but also makes the control method more efficient.

Description

technical field [0001] The invention belongs to the field of control science and control engineering, and relates to a control method of a neutral system with distributed time-delay based on an interval-type T-S model. Background technique [0002] The mathematical models proposed in the fields of engineering technology, physics, mechanics, cybernetics, chemical reactions, biomedicine, etc. all have obvious hysteresis. Especially in automatic control devices, for any system with feedback, there must be a time difference between the input signal and the receipt of the feedback signal. Therefore, using traditional differential equations to describe the state of the system is only an approximation, which must meet the accuracy requirements, otherwise it will lead to errors. With the development of high technology, the requirements for the control system in actual engineering are constantly increasing, including the precise modeling of the system and the precise design of the c...

Claims

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Application Information

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IPC IPC(8): G05B13/04
CPCG05B13/0275G05B13/042
Inventor 程启文周绍生贾祥磊付世州
Owner HANGZHOU DIANZI UNIV
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