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Using Sliding Mode Control to Adjust Drum Level of a Boiler Unit With Time Varying Parameters

[+] Author Affiliations
Hamed Moradi, Firooz Bakhtiari-Nejad, Majid Saffar-Avval

Amirkabir University of Technology, Tehran, Iran

Aria Alasty

Sharif University of Technology, Tehran, Iran

Paper No. ESDA2010-24105, pp. 29-33; 5 pages
  • ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis
  • ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 5
  • Istanbul, Turkey, July 12–14, 2010
  • Conference Sponsors: International
  • ISBN: 978-0-7918-4919-4 | eISBN: 978-0-7918-3877-8
  • Copyright © 2010 by ASME


Stable control of water level of drum is of great importance for economic operation of power plant steam generator systems. In this paper, a linear model of the boiler unit with time varying parameters is used for simulation. Two transfer functions between drum water level (output variable) and feed-water and steam mass rates (input variables) are considered. Variation of model parameters may be arisen from disturbances affecting water level of drum, model uncertainties and parameter mismatch due to the variant operating conditions. To achieve a perfect tracking of the desired drum water level, two sliding mode controllers are designed separately. Results show that the designed controllers result in bounded values of control signals, satisfying the actuators constraints.

Copyright © 2010 by ASME



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