期刊
IEEE TRANSACTIONS ON CYBERNETICS
卷 -, 期 -, 页码 -出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TCYB.2023.3235155
关键词
Adaptation models; Predictive models; Computational modeling; Mathematical models; Adaptive systems; Data models; Training; Multioutput gradient radial basis function (MGRBF) network; multivariate nonlinear and nonstationary regression; online adaptive tracking; two-step training
This article proposes an adaptive multioutput gradient radial basis function (MGRBF) tracker for online modeling of multioutput nonlinear and nonstationary processes. The tracker is able to update its network structure online to encode the newly emerging system state and act as a perfect local multioutput predictor. Experimental results demonstrate that the proposed tracker outperforms existing methods in terms of adaptive modeling accuracy and online computational complexity.
Multioutput regression of nonlinear and nonstationary data is largely understudied in both machine learning and control communities. This article develops an adaptive multioutput gradient radial basis function (MGRBF) tracker for online modeling of multioutput nonlinear and nonstationary processes. Specifically, a compact MGRBF network is first constructed with a new two-step training procedure to produce excellent predictive capacity. To improve its tracking ability in fast time-varying scenarios, an adaptive MGRBF (AMGRBF) tracker is proposed, which updates the MGRBF network structure online by replacing the worst performing node with a new node that automatically encodes the newly emerging system state and acts as a perfect local multioutput predictor for the current system state. Extensive experimental results confirm that the proposed AMGRBF tracker significantly outperforms existing state-of-the-art online multioutput regression methods as well as deep-learning-based models, in terms of adaptive modeling accuracy and online computational complexity.
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