Computer and Modernization ›› 2022, Vol. 0 ›› Issue (02): 65-69.

Previous Articles     Next Articles

Phase Partition of Batch Process Based on Instantaneous Frequency Response Function

  

  1. (College of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China)
  • Online:2022-03-31 Published:2022-03-31

Abstract: Multi-phases characteristic is one of the essential characteristics of batch process, and the effective phase partition of batch process is the basis of fault monitoring. Most of the traditional phase partition methods focus on the input and output data of the process, which is sensitive to the input and output data mutation. In this paper, a phase partition method of batch process based on instantaneous frequency response function is proposed. This method uses instantaneous frequency response function to replace the input and output data for phase partition based on the instantaneous dynamic characteristics of the system. Wavelet transform is used to estimate the instantaneous frequency response function of the system and the kernel principal component analysis is used to reduce the dimension. The frequency response function is clustered by fuzzy C-means clustering to partition the phase. Experimental results show that the proposed method can realize the phase partition of batch process and has high robustness.

Key words: batch process, phase partition, frequency response function, wavelet transform