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Volume :28 Issue : 2 2001      Add To Cart                                                                    Download

m -Synthesis robust control of double-effect distillation columns

Auther : MANSOUR A. KARKOUB

 Mechanical Engineering Department, College of Engineering and Petroleum

Kuwait University, Tel: +965 481 7381, Fax: +965 484 7131. e-mail: mansourk@kuc01.kuniv.edu.kw

ABSTRACT

 The control of double-effect distillation columns has been the subject of a great deal of the research for the past few years. The preferred control tool used for disti1lation column is the Proportional Plus Integral (PT). However, this technique requires a fairly accurate model and does not guarantee robust performance in the presence of modeling and other errors. Therefore, a control design technique that will account for the shortcomings of the dynamic model has to be used. The m-synthesis technique has been proven to be a good tool to bridge the gap between the modeling and control design processes. Two controllers are designed for a double-effect distillation column using the m-synthesis control design technique. The controllers are designed for the model derived by Al-Elg and Palazoglu (1989). The resultant work leads to a much better response for the HP and LP distillates as well as the LP and HP bottoms. Moreover, the designed controllers are robust to variations in the high frequency dynamics, actuation and input uncertainties, and noise.

Keywords: Double effect distillation columns; m-synthesis; robust control.

 

 

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