Design of Robust Controller for Uncertain System

International Journal of Computer Trends and Technology (IJCTT)          
© 2016 by IJCTT Journal
Volume-36 Number-1
Year of Publication : 2016
Authors : R.Srinivasan, Dr.T.Babu


R.Srinivasan, Dr.T.Babu "Design of Robust Controller for Uncertain System". International Journal of Computer Trends and Technology (IJCTT) V36(1):14-16, June 2016. ISSN:2231-2803. Published by Seventh Sense Research Group.

Abstract -
Spherical tank systems are characterized by high uncertainty which makes hard to maintain its good stability margins and performance for closed loop system [7]. In conventional control, if the system parameter changes we cannot guarantee about the system performance hence it is important to design robust control for uncertain plant. In this paper the Quantitative Feedback Theory (QFT) has proved its dominance especially in the case of significant parametric uncertainty. The feature of Quantitative Feedback Theory is that it can take attention of huge parametric uncertainty along with phase information. For the purpose of QFT, the feedback system is usuallydefined by the twodegrees- of freedom arrangement. Here in the Spherical tank system the height can be controlled by manipulating the feed In-flow rate of the system.

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Quantitative Feedback Theory, Spherical Tank System, Loop Shaping, Robust Control.