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Design of distillation column controllers using BLT method.

Author(s)
Ashfaque Hussain Pirzada Department of Chemical Engineering, Mehran University of Engineering & Technology, Jamshoro, Pakistan
Khadija Qureshi Department of Chemical Engineering, Mehran University of Engineering & Technology, Jamshoro, Pakistan
Mukhtiar Ali Unar Department of Electronic, Telecommunication & Biomedical Engineering, Mehran University of Engineering & Technology, Jamshoro, Pakistan
Abstract
Multivariable control system is widely used in process industries. Due to process interactions and other reasons, MIMO (Multi-Input Multi-Output) systems are much more complex than the conventional SISO (Single Input Single Output) control systems. In recent years, the BLT (Biggest Log Modulus) method has got considerable popularity for the control of MIMO chemical processes. This method is based on the detuning of all the controllers from the Ziegler Nichols settings until a safe margin of closed loop stability is obtained. In this paper, multivariable PI (Proportional Plus Integral) controllers have been designed for two distillation column systems and it has been demonstrated that the BLT method can be an excellent alternative to the conventional Ziegler-Nichols rules.
Publication Details
Page(s) 53-58
DOI DOI not available
Published Journal: Mehran University Research Journal of Engineering and Technology, Volume: 24, Issue: 1, Year: 2005

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