Prototype room temperature control system based on Programmable Logic Controller industry Zellio SR2 B121 BD works based on the room temperature rises predetermined / programmed by programming the PLC, the increase in temperature of the room and the value of the temperature rise can be monitored using the LCD screen. Simulation is done in MATLAB and simulink and the results are compared for varying adaptation mechanism due to variation in adaptation gain. The comparison is done for different values of adaptation gain between MIT rule and Lyapunov rule. The plant which is taken for the controlling purpose is the first order system for simplicity. This paper deals with application of model reference adaptive control scheme and the system performance is compared with Lyapunov rule and MIT rule. The adaptive control process is one that continuously and automatically measures the dynamic behavior of plant, compares it with the desired output and uses the difference to vary adjustable system parameters or to generate an actuating signal in such a way so that optimal performance can be maintained regardless of system changes. This technique is based on the fundamental characteristic of adaptation of living organism. Adaptive control involves modifying the control law used by the controller to cope with the fact that the parameters of the system being controlled change drastically due to change in environmental conditions or change in system itself.
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