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Journal of Applied Sciences
Year: 2014  |  Volume: 14  |  Issue: 20  |  Page No.: 2530 - 2535

Design of Controllers Based on the Identified Model for the Humidifying Pilot Plant

Sivanandam Venkatesh, K. Ramkumar and Rengarajan Amirtharajan    

Abstract: Humidity control plays significant role in various industries to get desired product output. An experiment was conducted in the laboratory scale to model a humidity process and to control the same. Open loop test was conducted for the humidity process by introducing the step change and the relative humidity of the exit air was measured. The data was best matched with first order process with time delay. Proportional Integral (PI) controllers based on Ziegler Nichols (ZN), Direct Synthesis (DS) and Internal Model Control (IMC) methods were simulated in MATLAB environment and the time domain specifications showed better performance for IMC and DS based PI controllers.

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