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Developing an Adaptive Soft Sensor Using a Predictive Filter for a Nonstationary Process

  • CONTROL IN TECHNICAL SYSTEMS
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Abstract

We propose a procedure for developing an adaptive soft sensor using the example of an analyzer for a nonstationary mass-exchange process. The accuracy of the process output prediction is maximized (mean square error is minimized) by the process model error prediction, which is used as a correction to the process performance estimate. In the case of measurements of process characteristics equidistant in time, a measure of the proximity of the error spectrum distribution to the uniform distribution is used as an adaptation criterion. Such a criterion is essentially a “measure of proximity” of the process model to the optimal one. The advantage of the proposed criterion in comparison with the traditional ones, which measure the characteristics of the error spread, is that changes in the characteristics of the error spread of the model can be caused by reasons not related to the adequacy of the model. With nonequidistant measurements, the amplitudes of the harmonic components of the process are found, which permits one to reconstruct the values of the process characteristics at equidistant points in time using the inverse Fourier transform. In contrast to the traditionally used interpolation, this approach does not distort the spectrum of the process under consideration.

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Funding

This work was supported in part by the Russian Foundation for Basic Research and the National Natural Science Foundation of China within the framework of research project no. 21-57-53005.

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Authors and Affiliations

  1. Institute of Automation and Control Processes, Far East Branch, Russian Academy of Sciences, Vladivostok, 690041, Russia

    V. V. Klimchenko, O. Yu. Snegirev, S. A. Shevlyagina & A. Yu. Torgashov

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  1. V. V. Klimchenko
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  2. O. Yu. Snegirev
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  3. S. A. Shevlyagina
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  4. A. Yu. Torgashov
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Corresponding authors

Correspondence to V. V. Klimchenko, O. Yu. Snegirev, S. A. Shevlyagina or A. Yu. Torgashov.

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Translated by V. Potapchouck

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Klimchenko, V.V., Snegirev, O.Y., Shevlyagina, S.A. et al. Developing an Adaptive Soft Sensor Using a Predictive Filter for a Nonstationary Process. Autom Remote Control 83, 1984–1994 (2022). https://doi.org/10.1134/S00051179220120104

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  • DOI: https://doi.org/10.1134/S00051179220120104

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