Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/54174
Title: A frequency domain controller design method
Authors: Wang, Q.-G. 
Hang, C.-C. 
Qiang, B.I.
Keywords: Auto-tuning
FFT
Frequency response
Least squares method
Oscillatory process
Over-damped process
PID controller
Issue Date: 1997
Source: Wang, Q.-G.,Hang, C.-C.,Qiang, B.I. (1997). A frequency domain controller design method. Chemical Engineering Research and Design 75 (1) : 64-72. ScholarBank@NUS Repository.
Abstract: With the advent of the relay feedback auto-tuning technique, a number of PI/PID auto-tuning rules based on the results of the relay test are reported. Many of them employ only one or two points of the process frequency response. The designed controllers are limited to certain simple structured processes. In this paper, a multiple-point of frequency response fitting controller design method is proposed. First, multiple points on the process frequency response are estimated from a relay feedback test. The objective closed-loop response is then properly chosen with respect to the process frequency response. The controller is determined by minimizing the error between the actual and desired closed-loop response in a certain frequency region. Both over-damped and oscillatory processes are covered in the discussion. Simulation examples are included to demonstrate the proposed method.
Source Title: Chemical Engineering Research and Design
URI: http://scholarbank.nus.edu.sg/handle/10635/54174
ISSN: 02638762
Appears in Collections:Staff Publications

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