Dörtlü tank sisteminin modellenmesi, benzetimi ve kontrolü

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), which has two inputs and two outputs, nonlinearities and loop interactions, is chosen as a benchmark. QTP is suitable for studying linear and nonlinear controllers and exhibits minimum and non-minimum system behaviors due to changing valve positions. At first mathematical model of the system is obtained. Linearization of nonlinear process is delivered, than various control methods are applied and finally, the controlled system performance results are compared.