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Comparison between backstepping and input-output linearization techniques for pH process control
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DOI：10.1016/j.jprocont.2011.08.001.png)
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In this work performances of adaptive backstepping controller (BSC) and globally linearizing controller (GLC) are compared for pH control. First, based on the system full order model a GLC has been designed and it has been shown that this controller is identical to BSC proposed in the literature. Next in order to avoid state estimator design, BSC and GLC are designed based on pH reduced order model and their identities have been established. Through computer simulations, it has been shown that the performance of nonadaptive GLC designed based on reduced order model is better than that of adaptive BSC designed based on pH full order model which requires state measurement for implementation. Finally, the effectiveness of GLC designed based on the reduced order model in load rejection and set-point tracking has been demonstrated through simulation and experimental studies. (C) 2011 Elsevier Ltd. All rights reserved.
Keyword:
pH control
Globally linearizing controller
Backstepping technique
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3.9
论文数:
3.5K
被引数:
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