Refined Ziegler–Nichols Tuning Method for Unstable SISO Systems

Part of the Advances in Industrial Control book series (AIC)


The chapter proposes a method to improve continuous cycling method for tuning the PID controllers for unstable first-order plus time delay (FOPTD) and second-order plus time delay (SOPTD) systems.


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© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.Department of Chemical EngineeringIndian Institute of Technology MadrasChennaiIndia

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