Modelling, Simulation and Control of Quadruple Tank Process

Simple processes with only one output that may controlled by one input (variable) are known as single input single output process. But many processes are not such simple. They have more than one input (variable) and one output, which are called Multi Input-Multi Output (MIMO) processes. Common MIMO systems have some difficulties, such that they are large and complex. In addition, they have nonlinearities and also loop interactions which are between inputs and outputs. On the purpose of studying multivariable systems and designing controllers, the quadruple tank process (QTP) is chosen as a benchmark. This system is suitable for studying linear and nonlinear controllers and exhibits minimum and non-minimum system behaviors by simply changing configuration valve positions. We linearize nonlinear process model, than apply various control methods and compare the controlled system performance results.