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Title: A frequency response approach to autotuning of multivariable controllers
Authors: Wang, Q.-G. 
Hang, C.-C. 
Zou, B.
Keywords: Autotuning
Frequency response
Multivariable system
PID control
Relay feedback
Issue Date: 1997
Citation: Wang, Q.-G.,Hang, C.-C.,Zou, B. (1997). A frequency response approach to autotuning of multivariable controllers. Chemical Engineering Research and Design 75 (8) : 797-806. ScholarBank@NUS Repository.
Abstract: The relay auto-tuning technique for PID controllers is here extended to tune multivariable controllers. In the case of significant interaction, a fully cross-coupled multivariable controller rather than a decentralized controller should be employed. In this paper, an autotuning method for multivariable controllers from sequential relay feedback is proposed. The frequency response a m × m multivariable process is identified from limit cycles using a FFT-based method, and a multivariable controller is computed with linear least squares frequency response fitting. Various typical examples are included for illustration of the effectiveness of the method.
Source Title: Chemical Engineering Research and Design
ISSN: 02638762
Appears in Collections:Staff Publications

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