Fast just-in-time-learning recursive multi-output LSSVR for quality prediction and control of multivariable dynamic systems

Aiming at quality prediction and control of blast furnace (BF) ironmaking process characterized by complicated nonlinear time-varying dynamics, this paper proposes a just-in-time-learning (JITL) recursive multi-output least squares support vector regression (JITL-R-M-LSSVR) algorithm with fast nonli...

Full description

Saved in:
Bibliographic Details
Published in:Engineering applications of artificial intelligence Vol. 100; p. 104168
Main Authors: Zhou, Ping, Chen, Weiqi, Yi, Chengming, Jiang, Zhaohui, Yang, Tao, Chai, Tianyou
Format: Journal Article
Language:English
Published: Elsevier Ltd 01.04.2021
Subjects:
Blast furnace ironmaking process
Incremental learning
Just-in-time-learning (JITL)
Local learning nonlinear modeling
Model verification
Multi-output LSSVR (M-LSSVR)
Nonlinear predictive control
Incremental learning
Blast furnace ironmaking process
Just-in-time-learning (JITL)
Multi-output LSSVR (M-LSSVR)
Model verification
Local learning nonlinear modeling
Nonlinear predictive control
ISSN:0952-1976, 1873-6769
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Aiming at quality prediction and control of blast furnace (BF) ironmaking process characterized by complicated nonlinear time-varying dynamics, this paper proposes a just-in-time-learning (JITL) recursive multi-output least squares support vector regression (JITL-R-M-LSSVR) algorithm with fast nonlinear local learning capability for multivariable dynamic systems. The proposed fast JITL-R-M-LSSVR effectively combines the online local learning of JITL with the multi-output LSSVR (M-LSSVR) based on multi-task transfer learning, and focuses on how to ensure the rapid verification of the local model during online learning of M-LSSVR, and how to perform model pruning while recursively updating the model parameters to improve the calculation efficiency. To this end, the proposed algorithm uses a derived multi-output incremental learning algorithm to recursively update model parameters online in a gentle way, which has better modeling stability and smoothness than the traditional way that discards old models. At the same time, when the model is pruned, a novel multi-output reverse decremental learning algorithm is proposed to adaptively delete the modeling data, so as to effectively control the sample size and reduces the calculation cost. In particular, the model verification of the proposed algorithm only needs to construct the M-LSSVR modeling matrix and the matrix inverse operation once, and the matrix after deleting each modeling sample can be easily obtained by reverse decremental learning of the original modeling matrix, which can achieve fast and efficient model verification. Finally, the effectiveness and practicability of the proposed method are verified by applying it to prediction modeling and predictive control of the molten iron quality in BF ironmaking process. •A fast just-in-time-learning recursive multi-output LSSVR algorithm is proposed.•Fast nonlinear local M-LSSVR modeling of MIMO dynamic systems is achieved online.•Efficient pruning of M-LSSVR is performed by multi-output decremental learning.•Local M-LSSVR model is recursively updated by multi-output incremental learning.•Model verification only computes the modeling matrix and its inverse operation once.
ISSN:0952-1976
1873-6769
DOI:10.1016/j.engappai.2021.104168