Soft Computing Based Partial-Retuning of Decentralised PI Controller of Nonlinear Multivariable Process

  • L. Sivakumar
  • R. Kotteeswaran
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 248)


Recent developments in nature-inspired algorithms motivate the control engineers to work towards its application in industrial processes. Almost all the industrial processes are difficult to control since it involves many variables, strong interactions and inherent nonlinearities. In the present work the authors propose cuckoo search, a recent metahuristic algorithm to fine tune the parameters of decentralised PI controller of coal gasifier which is a highly nonlinear multivariable process having strong interactions among the control loops. With the existing controller parameters the response does not able to meet the performance requirements at 0% load for sinusoidal pressure disturbance test. The PI controller for pressure loop is retuned using Cuckoo search algorithm and the best optimal values for its parameters are obtained. Performance of the system with tuned optimal controller settings is evaluated for pressure disturbance test, load change test and coal quality test.


Coal gasifier Cuckoo search algorithm metahuristic algorithm multivariable process nonlinear systems PID Controller tuning 


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Copyright information

© Springer International Publishing Switzerland 2014

Authors and Affiliations

  1. 1.Sri Krishna College of Engineering and TechnologyCoimbatoreIndia
  2. 2.Department of Instrumentation and Control EngineeringSt. Joseph’s College of EngineeringChennaiIndia

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