ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Filtration of Signals

A. Vasičkaninová and A. Zemanovičová

Department of Process Control, Faculty of Chemical Technology, Slovak University of Technology, SK-812 37 Bratislava

Abstract: The contribution deals with the digital filter design for the filtration of concentration sensors output signals. The data from the CO₂ analyzer were filtered with FIR and IIR digital filters. The FIR filter is also called a nonrecursive or a convolution filter. Its transfer function is a polynomial in z^-1, it has no poles. The IIR filter is also called a recursive one and has a rational transfer function in z^-1, it has both poles and zeros. A very important set of methods for IIR filter design is based on converting Butterworth, Chebyshev, and elliptic-function analogue filters to digital ones. The best results in the filtration of CO₂ concentration were obtained with elliptic and Fm. filters.

Full paper in Portable Document Format: 523a131.pdf

Chemical Papers 52 (3) 131–135 (1998)