Performance Testing of Non-Linear pH Neutralization Using Bacterial Foraging Algorithm

Kandasamy, M.; Vijayachitra, S.
July 2014
Australian Journal of Basic & Applied Sciences;Jul2014, Vol. 8 Issue 10, p62
Academic Journal
Background: PID controllers are widely used in process industries to control linear, non linear, stable and unstable systems. Selection of proper PID controller tuning method and controller structure helps to improve the performance of the system. Textile industry waste water process is highly non linear and complicated due to more number of parameter variations. Objective: In this paper, Bacterial Foraging optimization (BFO) Algorithm based PID controller design procedure is proposed for a pH neutralization process widely employed in Textile waste water Treatment units. Results: The efficiency of the proposed method is validated through a comparative study with Ziegler-Nichols Method and Relay feedback Method. Also, the BFO Algorithm is implemented on parallel PID controller, I-PD controller and set point filter type PID controller in order to identify the best suitable controller structure for the pH neutralization process. Conclusion: The BFO based set point filter type PID controller shows an improved system performance compared with the parallel type PID controller and I-PD controller considered in this study. The BFO based set point filter type PID controller offers better set point tracking, load disturbance rejection, improved time domain specifications, and minimal error compared to the alternatives considered in this paper.


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