Soft measuring method of industrial process under condition of small sample

A technology of industrial production and small samples, which is applied in the direction of instruments, adaptive control, simulators, etc., and can solve problems such as difficulty in model determination

Inactive Publication Date: 2007-02-21
ZHEJIANG UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to aim at the above deficiency of existing soft sensor method, provide a kind of soft sensor method under the small sample condition of industrial production process, provide the selection method of support vector machine optimal model, make it overcome support vector machine The problem of difficult model determination in the application has established a reliable foundation and basis for support vector machine modeling

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  • Soft measuring method of industrial process under condition of small sample
  • Soft measuring method of industrial process under condition of small sample
  • Soft measuring method of industrial process under condition of small sample

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Embodiment Construction

[0013] The following describes the present invention in detail, the purpose and effect of the present invention will be more obvious:

[0014] 1. Standardize the sample data

[0015] Calculate the mean: TX ‾ = 1 N Σ i = 1 N T X i , TY ‾ = 1 N Σ i = 1 N TY

[0016] Calculate the variance: σ x 2 = 1 N - 1 Σ i = 1 N ( ...

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Abstract

A soft measurement method of industrial course under small sample condition includes using support vector computer to structure I / O mapping relation, measurable variables, object control input and object measurable output variable and utilizing them as input variables of soft measurement model, using optimum estimation of estimated variable as output, using genetic algorithm to confirm optimum parameter of support vector computer and applying Bayes rule to speed up convergence velocity of genetic algorithm.

Description

Technical field [0001] The present invention relates to the technical field of soft measurement in the field of industrial process control, in particular, to a soft measurement method under small sample conditions in an industrial production process. Background technique [0002] In the modern process industry, a large number of critical process conditions, product quality and other parameters lack online direct measurement methods. This has become a bottleneck restricting the further improvement of production safety, product quality, output and production efficiency. Soft measurement technology is an effective way to solve such problems. [0003] Soft-sensing technology is an important tool in the current control field, and its core technology is to establish a soft-sensing model. At present, soft sensor modeling methods mainly include mechanism modeling, multivariate statistical methods, Kalman filtering methods, artificial neural networks, and so on. These methods have achieve...

Claims

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Application Information

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IPC IPC(8): G05B17/02G05B13/02
Inventor 刘兴高阎正兵
Owner ZHEJIANG UNIV
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