Comparative studies of control performance for a nonlinear coupled quadruple conical tank system

There are many processes with Multi-Input Multi-Output (MIMO), which are non-linear in behavior. A difficulty arises in designing of controller when system interacting between input-output variables and coupling effects. This paper discusses the performance investigation of the classical PI controller and fuzzy logic-based controllers for coupled nonlinear quadruple conical tank system (QCTS). Experimental comparative analysis of controller’s performance discussed in depth. The fuzzy logic approach is more suitable for the nonlinear system to have interactions and coupling effects.