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Indirect Methods for Discretizing Fractional Order Differentiator in Delta Domain—A Comparative StudyBy Jaydeep Swarnakar, Prasanta Sarkar, Lairenlakpam Joyprakash Singh
Abstract: In this paper, three indirect methods are presented for discretizing fractional order differentiator in delta domain. To this aim, three extensively used discrete time approximation methods of -domains are reformulated in delta domain. As a first step of applying the indirect discretization method, rational approximation of a half order differentiator is obtained using the Oustaloup approximation method. Then, all of the proposed discretization methods are applied separately on the integer …
Published in Journal of Control & Instrumentation · Vol. 8, Issue 2, 2017 · pp. 27–34 Read article →