A Simple Grey Box Space Identification Method for Hammerstein Nonlinear Industrial Systems Driven by Dynamic and Static Data

A nonlinear system and hybrid drive technology, applied in general control systems, control/regulation systems, instruments, etc., can solve the problems of low model accuracy and failure to provide low-frequency information of the system, so as to improve model accuracy, reduce variance, and reduce estimation Effect of Parameter Variance

Active Publication Date: 2022-07-01
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a novel gray-box parsimony subspace identification method driven by dynamic / static data to accurately identify the Hammerstein nonlinear system, so as to overcome the fact that the existing black-box space identification method cannot provide low-frequency information of the system , leading to the problem of low model accuracy

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  • A Simple Grey Box Space Identification Method for Hammerstein Nonlinear Industrial Systems Driven by Dynamic and Static Data
  • A Simple Grey Box Space Identification Method for Hammerstein Nonlinear Industrial Systems Driven by Dynamic and Static Data
  • A Simple Grey Box Space Identification Method for Hammerstein Nonlinear Industrial Systems Driven by Dynamic and Static Data

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[0136] The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic idea of ​​the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0137] see Figure 1 to Figure 4 , the method of the present invention is applied to a wireless power transfer (WPT) system for research to illustrate the effectiven...

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Abstract

The invention relates to a simple grey-box space identification method for a Hammerstein nonlinear industrial system driven by dynamic and static data, and belongs to the field of control theory and control engineering nonlinear system identification. The method includes: S1: collect dynamic data and static data of the system; S2: select and process the Hammerstein nonlinear system model to obtain a prediction model; S3: construct a dynamic parsimonious model of the Hammerstein nonlinear system; S4: construct a static parsimonious model of the Hammerstein nonlinear system ; S5: Use the hierarchical Lagrangian optimal weighting method to solve the system parameter fusion identification. The present invention simultaneously adopts dynamic and static data, based on a decomposed parsimonious model, avoids the estimation of additional intermediate parameters, reduces the variance of the estimated model, and improves the accuracy of the model.

Description

technical field [0001] The invention belongs to the field of control theory and control engineering nonlinear system identification, and relates to a simple gray box space identification method of Hammerstein nonlinear industrial system driven by dynamic / static data hybrid. Background technique [0002] Hammerstein nonlinear system is a modular nonlinear system composed of static nonlinear modules and linear dynamic modules. It can effectively reflect the system characteristics of most practical input nonlinear industrial processes, and has been widely used in practical industrial processes. Describe, for example, blast furnace ironmaking systems, battery management systems, wireless power transmission systems, etc. In the past few decades, a lot of research work on Hammerstein nonlinear system identification has been carried out in the industry, and a variety of mature identification methods have been proposed successively, such as maximum likelihood estimation method, leas...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 侯杰黄祎谢昭贤陈丰伟刘井响李鹏华朱智勤
Owner CHONGQING UNIV OF POSTS & TELECOMM
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