|Table of Contents|

Linear Parameter Varying Model Identification of Nonlinear Systems Without Steady State(PDF)

Journal of Xiamen University(Natural Science)[ISSN:0438-0479/CN:35-1070/N]

Issue:
2017 04
Page:
560-566
Research Field:
Research Articles
Publishing date:
2017-07-26

Info

Title:
Linear Parameter Varying Model Identification of Nonlinear Systems Without Steady State
Article ID:
0438-0479(2017)04-0560-07
Author(s):
HUANG Jiangyin*ZHAO Jing
School of Electrical Engineering and Automation,Xiamen University of Technology,Xiamen 361024,China
Keywords:
nonlinear systems non-steady state linear parameter varying(LPV)model circulation fluidized bed boiler
CLC number:
TP 273
DOI:
10.6043/j.issn.0438-0479.201608005
Document code:

A
Abstract:
Two kinds of identification methods of the linear parameter varying(LPV)models for the nonlinear systems without steady states are both proposed in this paper.For the LPV model with linear weights,because parameters only exist in the local linear models,Gauss-Newton method and least square method are combined to estimate all parameters.For the LPV model with Gaussian weights,parameters exist in both weighting functions and local linear models.Narendra-Gallman method is used to estimate parameters.In the method,all parameters are divided into linear and nonlinear parts according to the relationship between them and optimization objectives.Then these two parts are estimated using the alternating iterative method.The proposed algorithm is validated by identifying an industrial circulation fluidized bed boiler.The outputs of the LPV model and real process of three main outputs:steam pressure,steam temperature and furnace temperature are analyzed and compared.Best fittings of these outputs are increased by 52.8%,21.1% and 32.2% respectively,confirming the validity and practicability of the algorithm in the identification field of complex nonlinear industrial processes.

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Memo

Memo:
收稿日期:2016-08-08 录用日期:2016-10-14
基金项目:福建省自然科学基金(2015J01275); 福建省教育厅省属高校科研项目(JK2015034)
*通信作者:jiangyinhuang@xmut.edu.cn
Last Update: 1900-01-01