The objective of this book is the estimation of the levels of a quadruple tank system by using the help of kalman filter and optimal controlling the levels of the tank system is done using Linear Quadratic Regulator(LQR). Quadruple tank system is a novel multivariable process and has been widely used in control literature to illustrate many concepts in multivariable control, particularly, performance limitations due to multivariable right half-plane zeros. Estimation of the state of a system is done by utilizing the knowledge of system, measurement dynamics and assumed statistics of system...