Soft sensor for ratio of soda to aluminate based on PCA-RBF multiple network

  • Gui Wei-hua 
  • Li Yong-gang 
  • Wang Ya-lin 


Based on principal component analysis, a multiple neural network was proposed. The principal component analysis was firstly used to reorganize the input variables and eliminate the correlativity. Then the reorganized variables were divided into 2 groups according to the original information and 2 corresponding neural networks were established. A radial basis function network was used to depict the relationship between the output variables and the first group input variables which contain main original information. An other single-layer neural network model was used to compensate the error between the output of radial basis function network and the actual output variables. At last, The multiple network was used as soft sensor for the ratio of soda to aluminate in the process of high-pressure digestion of alumina. Simulation of industry application data shows that the prediction error of the model is less than 3%, and the model has good generalization ability.

Key words

principal component analysis multiple neural network soft sensor ratio of soda to aluminate generalization ability 

CLC number



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Copyright information

© Central South University 2005

Authors and Affiliations

  • Gui Wei-hua 
    • 1
  • Li Yong-gang 
    • 1
  • Wang Ya-lin 
    • 1
  1. 1.School of Information Science and EngineeringCentral South UniversityChangshaChina

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