Design of robust SISO PI controllers for a MSF desalination plant

The method of inequalities is applied to the of design a robust PI controller for a multi-stage flash (MSF) desalination plant. The method takes into account the given variations in process gain, time delay and time constant ( K p , τ d and τ) of the transfer function models. The performance of the...

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Bibliographic Details
Published in:Desalination 1997-05, Vol.109 (2), p.109-119
Main Authors: Chidambaram, M., Chandrasekhara Reddy, B., Al-Gobaisi, Darwish M.K.
Format: Article
Language:English
Subjects:
Applied sciences
Desalination plant
Drinking water and swimming-pool water. Desalination
Exact sciences and technology
Marine
Optimization
Pollution
Robust controllers
Water treatment and pollution
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Summary:The method of inequalities is applied to the of design a robust PI controller for a multi-stage flash (MSF) desalination plant. The method takes into account the given variations in process gain, time delay and time constant ( K p , τ d and τ) of the transfer function models. The performance of the closed loop system is evaluated for different operating points (i.e., on different transfer function models). PI controllers are also designed using an internal model controller (IMC) and by Ziegler-Nichols (Z-N) methods based on the nominal transfer function model. The performances of these controllers are compared. The controller designed by the method of inequalities gives the best results.
ISSN:0011-9164
1873-4464
DOI:10.1016/S0011-9164(97)00057-X