Article,

Multivariable Control System Design for Quadruple Tank Process using Quantitative Feedback Theory (QFT)

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International Journal on Control System and Instrumentation, 1 (1): 5 (July 2010)

Abstract

This paper focus on design of multivariable controller for Quadruple Tank Process, a two input two output system with large plant uncertainty using QFT methodology. In the present work, a new approach using Quantitative Feedback Theory (QFT) is formulated for design of a robust two degree of freedom controller for Quadruple Tank Process. The design is done in frequency domain. This paper presents a design method for a 2 x 2 multiple input multiple output system. The plant uncertainties are transformed into equivalent external disturbance sets, and the design problem becomes one of the external disturbance attenuation. The objective is to find compensator functions which guarantee that the system performance bounds are satisfied over the range of plant uncertainty. The methodology is successfully applied to design a two degree of freedom compensator Quadruple Tank Process.

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