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Vol. 133, Issue 10, October 2011, pp.53-64




Design and Real Time Implementation of CDM-PI Control System in a Conical Tank Liquid Level Process


1 P. K. Bhaba and 2 S. Somasundaram

1 Department of Chemical Engineering, Annamalai University,

Chidambaram, Tamilnadu, India, 608002

2 Department of Instrumentation Engineering, Annamalai University,

Chidambaram, Tamilnadu, India, 608002

E-mail: pkbhaba@gmail.com, ssundaramau@gmail.com



Received: 24 August 2011   /Accepted: 25 October 2011   /Published: 31 October 2011

Handbook of Laboaratory Measurements book


Abstract: The work focuses on the design and real time implementation of Coefficient Diagram Method (CDM) based PI (CDM-PI) control system for a Conical Tank Liquid Level Process (CTLLP) which exhibits severe static non-linear characteristics. By taking this static non-linearity into account, a Wiener Model (WM) based CDM-PI control system is developed and implemented in real time operations. The performance of this control system for set point tracking and load disturbance rejection is studied. In addition, the performance is compared with other WM based PI controllers. Real time results clearly show that WM based CDM-PI control system outperforms over the others.


Keywords: Worst case model parameters, Wiener model, CDM-PI, CTLLP, Real time operations


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