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Open AccessArticle

The Application of a New PID Autotuning Method for the Steam/Water Loop in Large Scale Ships

1
College of Automation, Harbin Engineering University, Harbin 150001, China
2
Research Group on Dynamical Systems and Control, Department of Electromechanical, Systems and Metal Engineering, Ghent University, B9052 Ghent, Belgium
3
Core Lab EEDT—Energy Efficient Drive Trains, Flanders Make, 9052 Ghent, Belgium
4
Department of Automation, Technical University of Cluj-Napoca, Memorandumului Street No.28, 400114 Cluj-Napoca, Romania
*
Author to whom correspondence should be addressed.
Processes 2020, 8(2), 196; https://doi.org/10.3390/pr8020196
Received: 24 December 2019 / Revised: 28 January 2020 / Accepted: 29 January 2020 / Published: 6 February 2020
In large scale ships, the most used controllers for the steam/water loop are still the proportional-integral-derivative (PID) controllers. However, the tuning rules for the PID parameters are based on empirical knowledge and the performance for the loops is not satisfying. In order to improve the control performance of the steam/water loop, the application of a recently developed PID autotuning method is studied. Firstly, a ‘forbidden region’ on the Nyquist plane can be obtained based on user-defined performance requirements such as robustness or gain margin and phase margin. Secondly, the dynamic of the system can be obtained with a sine test around the operation point. Finally, the PID controller’s parameters can be obtained by locating the frequency response of the controlled system at the edge of the ‘forbidden region’. To verify the effectiveness of the new PID autotuning method, comparisons are presented with other PID autotuning methods, as well as the model predictive control. The results show the superiority of the new PID autotuning method. View Full-Text
Keywords: steam/water loop; steam power plant; proportional-integral-derivative controller; multi-input and multi-output system steam/water loop; steam power plant; proportional-integral-derivative controller; multi-input and multi-output system
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MDPI and ACS Style

Zhao, S.; Liu, S.; De Keyser, R.; Ionescu, C.-M. The Application of a New PID Autotuning Method for the Steam/Water Loop in Large Scale Ships. Processes 2020, 8, 196.

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