Design of tunable method of PID controller for conical tank system

Non-linear control systems are very importance in process industries and also designing a controller for nonlinear process is highly difficult task to maintain the process under stable conditions at different kinds of disturbances. Many process industries use conical tanks which contribute better drainage for solid mixtures, slurries and viscous liquids. The objective of the work is to explain about designing of suitable controller design for conical tank system to control the liquid level.