Chemical procedure modelling approach possessing reconstructed operation RNA genetic algorithm

A chemical process and genetic algorithm technology, applied in the field of chemical process modeling, can solve the problems of insurmountable mode deception, algorithm research work in the early stage, poor optimization performance, etc., to improve premature convergence, increase diversity, and good application prospects. Effect

Inactive Publication Date: 2009-01-07
ZHEJIANG UNIV
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AI Technical Summary

Problems solved by technology

However, the research work on such algorithms is in its infancy, and there are still many problems to be solved.
For example, the optimization performance is poor in a high-dimensional environment; on highly deceptive problems, the model deception cannot be overcome, and it is easy to fall into a local optimal solution

Method used

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  • Chemical procedure modelling approach possessing reconstructed operation RNA genetic algorithm
  • Chemical procedure modelling approach possessing reconstructed operation RNA genetic algorithm
  • Chemical procedure modelling approach possessing reconstructed operation RNA genetic algorithm

Examples

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Embodiment

[0042] The main fractionation process of a 1.4 million tons heavy oil catalytic cracking unit in a refinery is as follows: image 3 shown. From image 3It can be seen that the circulating oil slurry is drawn from the bottom of the tower, first exchanges heat with the raw material oil, and then is divided into two parts: one part is used as oil slurry circulation; the other part is cooled and then discharged from the device. The second medium circulation heat extraction system is divided into three parts after being extracted from the third tray: the first part returns to the second tray as internal reflux; the second part returns to the fifth tray as the second circulation reflux; the third Part of it is withdrawn as back refinery oil. From the 17th floor to the 20th floor, there is a medium circulation heating system to further cool down the oil and gas, and the 20th floor is also equipped with a light diesel oil extraction line. The top circulation heat extraction system ...

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Abstract

The invention discloses a chemical engineering process modeling method of an RNA genetic algorithm with remodeling operation, which has the following steps: 1) actual input and output sampling data is obtained by on-site operation or experiment, and then the sum of the absolute value of the error between the estimated output and the actual output of a chemical engineering process model is used as the objective function of the RNA genetic algorithm for optimization research; 2) algorithm control parameters is set; 3) the RNA genetic algorithm with remodeling operation is operated to do estimation for the unknown parameters of the chemical engineering process model, then the estimated value of the unknown parameters of the chemical engineering process model is obtained by the minimized objective function, and the estimated value of the unknown parameters is substituted into the chemical engineering process model to form a mathematical model of the chemical engineering process. The excellent genes of original species group is preserved when the diversity of the species group is increased effectively, thereby avoiding the defects of the premature convergence of traditional genetic algorithm and the convergence of locally optimal solution better.

Description

technical field [0001] The invention relates to a chemical process modeling method of RNA genetic algorithm with reconstruction operation. Background technique [0002] The modeling and control of chemical process has always been one of the key research areas of enterprises and scientific research institutions. It is an indispensable link in the production of modern chemical industry, and modern industrial control is based on models, that is to say, the mathematics of chemical process Models are at the heart of control. According to the reaction mechanism of the chemical process, the researchers put forward the corresponding chemical process model structure. However, in these chemical process models with known model structures, there are many parameters that cannot be directly measured. It is necessary to use parameter estimation methods to estimate the values ​​of these unknown parameters, and substitute the estimated values ​​of these parameters into the corresponding che...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06N3/12
Inventor 王宁陈霄陶吉利
Owner ZHEJIANG UNIV
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