Multivariable PID control by decoupling

Juan Garrido, Francisco Vázquez and Fernando Morilla

International Journal of Systems Science, 2016, vol. 47, issue 5, 1054-1072

Abstract: This paper presents a new methodology to design multivariable proportional-integral-derivative (PID) controllers based on decoupling control. The method is presented for general n × n processes. In the design procedure, an ideal decoupling control with integral action is designed to minimise interactions. It depends on the desired open-loop processes that are specified according to realisability conditions and desired closed-loop performance specifications. These realisability conditions are stated and three common cases to define the open-loop processes are studied and proposed. Then, controller elements are approximated to PID structure. From a practical point of view, the wind-up problem is also considered and a new anti-wind-up scheme for multivariable PID controller is proposed. Comparisons with other works demonstrate the effectiveness of the methodology through the use of several simulation examples and an experimental lab process.

Date: 2016
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Citations: View citations in EconPapers (1)

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DOI: 10.1080/00207721.2014.911390

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