The time-varying and multi-dimensional characteristics are major causes of the low performance of softsensors in chemical processes. To solve the problem, an improved adaptive soft sensor modeling method is proposed....
详细信息
The time-varying and multi-dimensional characteristics are major causes of the low performance of softsensors in chemical processes. To solve the problem, an improved adaptive soft sensor modeling method is proposed. This method obtains predicted deviation by modular steps of moving window and evaluates deterioration of softsensors via ttest adaptively. Besides, this paper combines the moving window-autoassociative neural network (AANN) method to update both the modeling auxiliary variable and the auxiliary variable data. Data simulation and result analysis obtained via a continuous stirred tank reactor (CSTR) and a debutanizer column process (DCP) show that the improved adaptive soft sensor modeling method proposed in this paper can evaluate the deterioration of softsensors and update the softsensormodeladaptively, and improve the predicted performance of softsensors for time-varying and multi-dimensional chemical processes.
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