Resumo (PT):
Abstract (EN):
In this paper we develop a method for obtaining digital rational approximations
to fractional-order operators of type s
J
, where J ƒ. The proposed method is based on
the least-squares (LS) minimization between the impulse response of the fractional
Euler/Tustin operators and the digital rational-fraction approximation. We make a
comparison with other approaches and the results reveal that the LS method gives
superior approximations. The effectiveness of the method is demonstrated both in the
time and frequency domains through an illustrative example. Copyright © 2004 IFAC
Language:
English
Type (Professor's evaluation):
Scientific
No. of pages:
6