Frequency Domain Analysis Of The Quadruple Tank System

Multivariable systems exhibit complex dynamics because of the interactions between inputs and outputs. The quadruple-tank process has been widely used for control education to present many concepts in multivariable control, such as performance limitations due to multivariable right half-plane zeros or input-output pairing problems. This paper discusses the frequency dependent relative gain array, relative gain array number and Nyquist array plots for the quadruple tank system and addresses diagonal dominance and pole assignment problems. Keywords- Quadruple Tank System, Relative Gain Array, Relative Gain Array Number Plot, Pole Assignment