화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.21, No.1, 1-5, January, 2004
DOI10.1007/BF02705373  Export Citation
An Analytic Expression for Closed-Loop Output Behavior under Multiloop PID Control
Byung-Su Ko, Thomas F. Edgar†, and Jietae Lee1
  • Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, USA
  • 1Department of Chemical Engineering, Kyungpook National University, Daegu 702-701, Korea
E-mail:
An analytic expression is derived for closed-loop output behavior under a multiloop PID control. Based on the analytic expression obtained, optimization problems are formulated to assess 1) best achievable quadratic performance using multiloop PID control, 2) best achievable quadratic performance on key process variables while maintaining reasonable performance on other less critical process variables, 3) achievable performance improvement with decouplers, and 4) effects of loop pairing on achievable performance. It is shown through a simulated example that individual loop performance as well as the overall multiloop PID control performance can be assessed by using the proposed method.
Keywords:Analytic Expression;Multiloop PID Control;Performance Assessment;Time-Series Analysis
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