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Title:Korekcijski faktorji koeficientov digitalnih struktur pri spremembi frekvence vzorčenja
Authors:ID Dodić, Aleksandar (Author)
ID Brezočnik, Zmago (Mentor) More about this mentor... New window
Files:.pdf DOK_Dodic_Aleksandar_2016.pdf (3,36 MB)
MD5: 827B661984112B163D973AF84059602A
 
Language:Slovenian
Work type:Dissertation
Typology:2.08 - Doctoral Dissertation
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:V doktorski disertaciji so razviti trije postopki korekcije koeficientov rekurzivnega digitalnega filtra druge stopnje pri neželeni spremembi frekvence vzorčenja. Filter druge stopnje je izbran, ker je to osnovna struktura filtrov višje stopnje, ki se dobi s kaskadno vezavo struktur druge stopnje. Za analizo smo izbrali eliptični filter druge stopnje z mejno frekvenco 3 Hz pri frekvenci vzorčenja 50 Hz. Analizirali smo obnašanje filtra pri spremembi frekvence vzorčenja za 15, 25, 100 in 150 Hz. Za te frekvence smo analizirali spremembo lege polov, ničel in posameznih koeficientov prenosne funkcije. Analizirali smo spremembe vrednosti polov in ničel v odvisnosti od frekvence vzorčenja in spremembe vrednosti koeficientov števca in imenovalca prenosne funkcije. Za te spremembe smo tvorili ustrezne krivulje, ki so nam bile osnova za interpolacijo vrednosti koeficientov prenosne funkcije za poljubno frekvenco vzorčenja. Za omejeno število znanih frekvenc vzorčenja smo vrednosti koeficientov shranili v podatkovni blok vrednosti koeficientov. Iz tega bloka pri pogojih, določenih z razvitim algoritmom v okviru doktorske disertacije, vrednosti koeficientov prenesemo v digitalni filter.
Keywords:digitalna obdelava signalov, programabilni logični krmilnik – PLC, digitalni filtri, rekurzivni filtri, frekvenca vzorčenja
Place of publishing:Maribor
Publisher:A. Dodić
Year of publishing:2016
PID:20.500.12556/DKUM-60602 New window
UDC:621.3.049.77:621.38(043.3)
COBISS.SI-ID:20167702 New window
NUK URN:URN:SI:UM:DK:IZ24YHFW
Publication date in DKUM:19.01.2017
Views:2271
Downloads:146
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FERI
:
DODIĆ, Aleksandar, 2016, Korekcijski faktorji koeficientov digitalnih struktur pri spremembi frekvence vzorčenja [online]. Doctoral dissertation. Maribor : A. Dodić. [Accessed 18 April 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=60602
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Secondary language

Language:English
Title:Correctio factors of digital structure coefficients at sampling frequency change
Abstract:In this doctoral dissertation three correction procedures for second order recursive filter coefficients, which occur during unwanted sampling frequency change are developed. The second order filter is chosen because it represents a basic structure for high order filters that is obtained by cascading second order structures. In this application, we choose the elliptical second order filter with a cut-off frequency of 3 Hz and a sampling frequency of 50 Hz. We analysed the filter's behaviour for sampling frequency changes at 15, 25, 100 and 150 Hz. At this frequencies, we analysed the pole and zero shifting, and changes of the individual coefficients of the transfer function. Changes of the pole and zero values depending on sampling frequencies as well as changes in the numerator and denominator of the transfer function have also been analysed. For these changes, the appropriate curves representing the basis for interpolation of the transfer function of arbitrary sampling frequency were created. For a limited number of known sampling frequencies the coefficient values of a transfer function were stored in a data block with coefficient values. From this data block, the coefficient values are transferred to the digital filter under conditions set by algorithm formed in the dissertation
Keywords:digital signal processing, programmable logic controller – PLC, digital filters, IIR filters, sampling frequency


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