Distributed online modeling method based on CCA and block type RPLS

A modeling method and distributed technology, applied in the direction of instrumentation, adaptive control, control/regulation system, etc., can solve the problem of low modeling efficiency

Inactive Publication Date: 2015-09-16
NANJING UNIV OF TECH
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Problems solved by technology

However, the disadvantages of this invention are: the modeling efficiency is relatively low, and the model accuracy and anti-interference ability need to be further strengthened

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  • Distributed online modeling method based on CCA and block type RPLS
  • Distributed online modeling method based on CCA and block type RPLS
  • Distributed online modeling method based on CCA and block type RPLS

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Embodiment Construction

[0083] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0084] In order to solve the above technical problems, the present invention provides a distributed online modeling method based on CCA and block type RPLS, such as figure 2 shown, including steps:

[0085] S101: Analyze the quality index of the large chemical process, select key variables closely related to the quality index as output variables, and select process variables as input variables, so as to obtain an input variable set X and an output variable set Y. ...

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Abstract

The invention discloses a distributed online modeling method based on a CCA and a block type RPLS. The method comprises the steps that S101: the quality index of the large chemical process is analyzed, key variables closely related to the quality index are selected to act as output variables, and process variables are selected to act as input variables so that an input variable set X and an output variable set Y are obtained; S102: all the components in the input variable set X and the output variable set Y are correspondingly combined into input and output data, subsystem decomposition is performed on the input and output data by adopting a canonical correlation analysis method, and the input variables and the output variables of subsystems are confirmed; S103: sample data sets of all the subsystems are constructed according to the confirmed subsystems and the corresponding input variables and the output variables, and online modeling is performed on all the subsystems in turn by adopting a block type RPLS algorithm. The distributed online modeling method based on the CCA and the block type RPLS is high in modeling efficiency and higher in model precision and anti-interference capability.

Description

technical field [0001] The invention relates to the technical field of chemical process modeling, in particular to a distributed online modeling method based on CCA and block type RPLS. Background technique [0002] In the complex chemical process, because the controlled system is difficult to obtain the mathematical model of the system by establishing a mechanism model, the mathematical model of the system is usually obtained by the method of system identification, such as partial least square (PLS)[ 1] etc. However, when the controlled system itself is relatively complex or in a relatively harsh environment, the structural parameters of the system will change with time and the operating environment, such as catalytic attenuation, drift, and energy efficiency reduction. At this time, the model obtained by offline system identification is difficult to meet the model accuracy requirements of the dynamic system, which brings great challenges to the model-based controller desi...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): G05B13/04
Inventor李丽娟胡蓓蓓姚莉娟董婷婷
OwnerNANJING UNIV OF TECH