This letter deals with the discrete approximation of the fractional-order differentiator s^0.5. The proposed approach is based on the efficient continued fraction approximation of the operator. The discrete differentiator is expressed as a z-transfer function, whose coefficients are given in closed form in terms of the sampling time and an approximation parameter. Simulation experiments show the efficiency of the approximation with low-order z-transfer functions.
Autori: | |
Titolo: | A Rational Discrete Approximation to the Operator s^0.5 |
Rivista: | |
Data di pubblicazione: | 2006 |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1109/LSP.2005.862615 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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