Classical Control System

The Temperature measurement of liquid in a tank can be controlled by classical and advance control algorithms applying PID, FUZZY LOGIC , SFB, LQR. Here, we consider a three tank noninteracting system. We observed that tank1 affects the dynamic behavior of tank2. Similarly, tank2 affects the dynamic behavior of tank3 and vice versa, because the flow rate F1 depends on the difference between liquid levels h1and h2. Thus, a change in the inlet flowrate affects the liquid level in the tank, which in turn affects the temperature of the liquid. Basically, it is a thermal process. Various types of temperature sensors include RTD, T/C, and Thermistor. In this particular project the author used a mercury thermometer as sensor. Mathematical models of the three tank method give a third order equation. Each tank gives a transfer function of the first order system. They make it easy to check whether a particular algorithm is giving the requisite results. A lot of work has been carried out on the temperature control in terms of its stabilization. Many attempts have been made to control the response of temperature measuring systems.