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Soft measurement method of reactant concentration in a continuous stirred tank reactor based on positive-strand RNA-GA and meter thereof

A stirred reactor and RNA-GA technology, which is applied in the field of continuous stirred reactor reactant concentration soft measurement instrument based on positive strand RNA-GA, can solve the problems of low precision, poor real-time performance, and difficult parameter determination.

Inactive Publication Date: 2009-11-25
ZHEJIANG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a soft measurement method for reactant concentration in a continuous stirring reactor based on positive strand RNA-GA in view of the difficulties in determining the parameters of the existing continuous stirring reactor process soft measuring instrument, low precision, and poor real-time performance and instruments

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  • Soft measurement method of reactant concentration in a continuous stirred tank reactor based on positive-strand RNA-GA and meter thereof
  • Soft measurement method of reactant concentration in a continuous stirred tank reactor based on positive-strand RNA-GA and meter thereof
  • Soft measurement method of reactant concentration in a continuous stirred tank reactor based on positive-strand RNA-GA and meter thereof

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Embodiment Construction

[0046] The invention includes two parts: a genetic algorithm based on positive strand RNA structure and a soft sensing method based on RBF neural network, and a soft sensing instrument based on the method.

[0047] One, the present invention is based on the genetic algorithm of positive strand RNA structure and the soft sensing method of RBF neural network, comprises the following steps:

[0048] 1. Collect the data of continuous stirring reactor temperature, inlet temperature, outlet flow rate, coolant temperature, coolant flow rate, and reactant concentration, and establish a historical database of each variable.

[0049] 2. Read historical database data at regular intervals and perform preprocessing so that the mean value of each variable is 0 and the variance is 1. The process is as follows:

[0050] mean: T ‾ = 1 N Σ i = 1 ...

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Abstract

The invention discloses a soft measurement method of reactant concentration in a continuous stirred tank reactor based on positive-strand RNA-GA and meter thereof, which is used for solving the problem of variable on-line estimation that on-line real-time measurement is difficultly carried out by using a sensor or analysis meter in the process of a continuous stirred tank reactor. The on-site collected input / output data in various working conditions is used as sample data of RBF neural network after treatment; the Centroid and the weight of the RBF neural network are optimized by using genetic algorithm based on positive-strand RNA so as to obtain the optimal neural network soft measurement model; and the on-line real-time measurement of reactant concentration in a continuous stirred tank reactor is realized by using the soft measurement model. The invention has high precision and real-time performance, and provides necessary conditions for efficiently optimizing and controlling the continuous stirred tank reactor in advanced manner.

Description

technical field [0001] The invention relates to a process variable measurement technology of a continuous stirring reactor, in particular to a soft measuring instrument and a soft measuring method for reactant concentration of a continuous stirring reactor based on positive strand RNA-GA. Background technique [0002] In many industrial processes, some important process parameters that need to be strictly controlled and are closely related to product quality lack online direct measurement means due to technical or economic reasons, which has become a bottleneck restricting the further improvement of product quality, output and economic benefits. . Soft sensor technology provides an effective way to solve such problems. The continuous stirring reactor is a complex nonlinear chemical reactor, which is widely used in petrochemical, pharmaceutical and other industrial production processes, and its control effect directly affects production efficiency and quality indicators. Fo...

Claims

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Application Information

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IPC IPC(8): G01N33/00G06N3/02G06N3/10
Inventor 徐铭泽王宁陶吉利
Owner ZHEJIANG UNIV
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