Recently, a robust controller has been proposed to be used in control of plants with large uncertainty in location of one of their poles. By using this controller, not only the phase margin and gain crossover frequency are adjustable for the nominal case but also the phase margin remains constant, notwithstanding the variations in location of the uncertain pole of the plant. In this paper, the tuning rule of the aforementioned controller is extended such that it can be applied in control of plants modeled by fractional order models. Numerical examples are provided to show the effectiveness of the tuned controller.
On Robust Control of Fractional Order Plants: Invariant Phase Margin
Manuscript received September 25, 2014; final manuscript received January 8, 2015; published online April 16, 2015. Assoc. Editor: J. A. Tenreiro Machado.
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Hossein Basiri, M., and Saleh Tavazoei, M. (September 1, 2015). "On Robust Control of Fractional Order Plants: Invariant Phase Margin." ASME. J. Comput. Nonlinear Dynam. September 2015; 10(5): 054504. https://doi.org/10.1115/1.4029553
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