In process industries, the control of the nonlinear process is one of the essential issues, which exhibits nonlinear behaviour. The nonlinear system is used in various sectors namely chemical, petroleum, water treatment, pharmaceutical, food processing and construction etc. In these industries, it is important to control the essential process parameters like liquid level, heating element temperature, and flow between the tanks. Failing to do so, may lead to a breakdown or emergency shutdown of the plant process. Therefore it is essential to maintain the parameters of the tank at a particular...