Volume 36, Issue 3 pp. 521-540
RESEARCH ARTICLE

Auxiliary model-based multi-innovation recursive identification algorithms for an input nonlinear controlled autoregressive moving average system with variable-gain nonlinearity

Yamin Fan

Corresponding Author

Yamin Fan

College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao, 266061 P. R. China

Correspondence Ximei Liu and Yamin Fan, College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao, 266061, P. R. China.

Emails: [email protected]; [email protected]

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Ximei Liu

Corresponding Author

Ximei Liu

College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao, 266061 P. R. China

Correspondence Ximei Liu and Yamin Fan, College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao, 266061, P. R. China.

Emails: [email protected]; [email protected]

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First published: 22 November 2021
Citations: 56

Funding information: National Natural Science Foundation of China, 61472195

Summary

For the parameter estimation problem of an input nonlinear controlled autoregressive moving average system with variable-gain nonlinearity, this article gives an analytical form of the variable-gain nonlinearity by introducing an appropriate switching function and derives an auxiliary model-based extended stochastic gradient algorithm with a forgetting factor and an auxiliary model-based recursive extended least-squares algorithm. For the sake of improving the parameter estimation accuracy, an auxiliary model-based multi-innovation extended stochastic gradient algorithm with a forgetting factor and an auxiliary model-based multi-innovation recursive extended least-squares algorithm are presented by utilizing the multi-innovation identification theory. The simulation results confirm the effectiveness of the proposed algorithms and show that the auxiliary model-based multi-innovation recursive identification algorithms have higher identification accuracy compared with the other two algorithms.

DATA AVAILABILITY STATEMENT

All data generated or analyzed during this study are included in this article.

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