吉林大学学报(工学版) ›› 2009, Vol. 39 ›› Issue (05): 1278-1281.

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Method of closedloop identification based on frequency domain for twoinput and twooutput (TITO) systems

ZHAO Yong-guo1, JIA Lei2, CAI Wen-jian3   

  1. 1.Institute of Automation, Shandong Academy of Science, Jinan 250014,China;2.School of Control Science and Engineering, Shandong University, Jinan 250061, China;3.School of Electrical and Electronic Engineering,Nanyang Technological University, Singapore 639798
  • Received:2008-04-25 Online:2009-09-01 Published:2009-09-01

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Abstract:

    An engineering oriented online identification technique for a twoinput and twooutput(TITO) closedloop control system was presented. By two setpoint change tests, the frequency response in the range of interest corresponding to   phase lag were estimated, and the parameters of transfer function matrix were identified by matching the model in the frequency domain. The proposed identification method only requires response data of process input and output, and no prior knowledge of the process dynamics is needed. The typical TITO processes were employed to illustrate the effectiveness and practicability of proposed method.

Key words: computer application, twoinput and twooutput(TITO) systems, closedloop identification, frequency response

CLC Number: 

  • TP301
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