Ji yu pca-rbf shen jing wang luo de gong ye lie jie lu shou lv zai xian yu ce ruan ce liang fang fa

Yang, Erfu and Zhou, Qiang and Hu, Yi Feng and Xu, Yong Mao (2001) Ji yu pca-rbf shen jing wang luo de gong ye lie jie lu shou lv zai xian yu ce ruan ce liang fang fa. Xitong Fangzhen Xuebao / Journal of System Simulation, 13 (S1). pp. 194-197. ISSN 1004-731X

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Abstract

The industrial pyrolysis furnace is a key equipment in ethylene process. It is very essential and important to on-line obtain the accurate yields of products not only for advanced control, process optimization, production evaluation, but also for performance monitoring, safety supervision, and fault diagnosis. However, it is usually difficult to on-line measure the product yields because of many practical reasons in some ethylene plants. In order to solve the problem on on-line yields prediction of industrial pyrolysis furnace, a soft-sensing approach with multi-inputs and multi-outputs (MIMO), and on-line correcting methods are investigated based on PCA(principal component analysis)-RBF(radial basis function) neural networks. The topology structure of this soft-sensing approach is as follows: the first unit is PCA, the second is RBF neural network, and the third is correcting unit. So the soft-sensing approach combines the abilities of PCA to de-correlate the variables and reduce the dimensionality of the data matrix with that of neural network to approximate any complex nonlinear function. The approach, which is of good real-time property, short modeling time, little calculations, and easily correcting, can be applied to on-line predict the yields of industrial pyrolysis furnace. The good performance of PCA-RBF soft-sensing approach for on-line yields prediction is illustrated by the example from a SRT-IV furnace. The results show that the soft-sensing approach to on-line predict the yields of industrial pyrolysis furnace based on PCA-RBF neural network is effective.

ORCID iDs

Yang, Erfu ORCID logoORCID: https://orcid.org/0000-0003-1813-5950, Zhou, Qiang, Hu, Yi Feng and Xu, Yong Mao;