NON LINEAR TANK LEVEL CONTROL USING LABVIEW

Modeling and control of highly nonlinear system is important in industries. The work on the development of model identification and controller designing for spherical tank level control process. [1] Spherical tank is considered as nonlinear system, where the aim is to control the liquid level of tank. Control of liquid level in spherical tank system is highly challenging due to variation in the area of cross section of spherical tank with change in shape. So, tank is liberalized into different operating regions by step test method. First order plus dead time model is identified from real time process tank at different operating point and multiple PID controller were planned to implement. Different type of tuning algorithm (ZN, CC, and IMC) was to be applied in simulation environment and optimized controller setting is highlighted on the basis of time domain analysis, error criterion test, and by stability analysis.[1]