PID control structure for glycerin bleaching process: A comparative study

This paper is to investigate the best PID control structure for controlling the glycerin bleaching process that would improve the bleached glycerin quality. An ideal and alternative PID control structures is analyzed. The controller parameters are adjusted based on Wang's tuning method and compared to Ziegler-Nichols method. The system performance is evaluated in terms of settling time and percent overshoot. The results showed that the glycerin bleaching process control can best achieve using alternative PID control structure with Ziegler-Nichols tuning.

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