Design of FOPI Controller for Time Delay Systems and Its Experimental Validation  

作　　者：Gargi Baruah Somanath Majhi Chitralekha Mahanta 

机构地区：[1]Department of Electronics and Electrical Engineering, Indian Institute of Technology Guwahati

出　　处：《International Journal of Automation and computing》2019年第3期310-328,共19页国际自动化与计算杂志（英文版）

摘　　要：In this paper,we report on the identification and modeling of unknown and higher order processes into first order plus dead time(FOPDT)plants based on the limit cycle information obtained from a single relay feedback test with an online fractional order proportional integral(FOPI)controller.The parameters of the test processes are accurately determined by the state space method while the FOPI controller settings are re-tuned to achieve enhanced performance based on the identified model parameters based on the balancedtuning method.A new performance index,integral time fractional order absolute error(ITFIAE)is introduced in this paper for balanced tuning of fractional order(FO)controllers.It requires minimum design specifications without a-priori knowledge of gain and phase crossover frequencies and is done non-iteratively without disrupting the closed loop.Four test processes and experimental analysis on a coupled tank system(CTS)validate the theory proposed.In this paper, we report on the identification and modeling of unknown and higher order processes into first order plus dead time(FOPDT) plants based on the limit cycle information obtained from a single relay feedback test with an online fractional order proportional integral(FOPI) controller. The parameters of the test processes are accurately determined by the state space method while the FOPI controller settings are re-tuned to achieve enhanced performance based on the identified model parameters based on the balancedtuning method. A new performance index, integral time fractional order absolute error(ITFIAE) is introduced in this paper for balanced tuning of fractional order(FO) controllers. It requires minimum design specifications without a-priori knowledge of gain and phase crossover frequencies and is done non-iteratively without disrupting the closed loop. Four test processes and experimental analysis on a coupled tank system(CTS) validate the theory proposed.

关 键 词：AUTO-TUNING FRACTIONAL order proportional integral(FOPI) first order plus DEAD time(FOPDT) BALANCED tuning coupled TANK system(CTS). 

分 类 号：TP[自动化与计算机技术]