20.500.12556/DKUM-9105 Izvedba rekurzivnih digitalnih sit s PLC krmilnikom : magistrsko delo V nalogi je opisan postopek načrtovanja in izvedbe rekurzivnega digitalnega filtra tretje stopnje s programirnim logičnim krmilnikom. Namen filtra je izločanje neželenih signalov nizkih frekvenc pri obdelavi analognih vrednosti v sistemu industrijskega krmiljenja, ki je načrtovan s PLC krmilnikom. Pri praktični realizaciji in izračunu je uporabljen PLC krmilnik SIEMENS S7-315-DP. Kot pomoč pri vizualizaciji in analizi rezultatov je uporabljen operaterski panel S7-0P270. Za vizualizacijo smo generirali več diagramov, ki so nam pomagali pri sklepanju 0 obnašanju filtra. Ker karakteristike operaterskega panela v popolnosti ne zadoščajo zahtevam pri analizi filtra, smo bolj podrobno analizo opravili s primerjavo impulznega odziva filtra. Za praktično izvedbo smo izbrali eliptični filter, mejno frekvenco smo izbrali pri 3 Hz, frekvenca vzorčenja pa je bila 50 Hz. Primerjali smo vrednosti, katere je generiral PLC krmilnik in vrednosti, dobljene z MA TLAB-om. Pri tem smo ločeno analizirali obnašanje PLC krmilnika pri vnosu koeficientov v skrajšani obliki in ločeno za vnos v razširjeni obliki. Rezultati so prikazani za matematični model in za dejanski krmilnik. Odstopanje rezultatov za skrajšano obliko koeficientov, zaradi rekurzivnega načina obdelave, ni zanemarljivo. Digitalni filter tretje stopnje smo realizirali kot kaskadno vezavo dveh struktur prve in druge stopnje. Primerjava dejanskih vrednosti in matematične simulacije nam pokaže zelo dobro ujemanje rezultatov. Kot drugi primer uporabe digitalnega filtra smo izdelali oscilator zelo nizke frekvence. Pokazali smo, da lahko tudi za oscilator uporabimo isto digitalno strukturo implementirano v PLC krmilniku. In master thesis is described the executing ofthird order recursive digital filter (IIR) with PLC controller. The cutoff frequency is 3 Hz and sampling frequency is 50 Hz. We made the eliptic filter. Purpose of the filter is eliminating unwanted signals at processing of analog values with PLC controller. At practic realisation and calculation there is used PLC controller Siemens S7-315-DP. As a help in visualisation in the result analysis, there is used operator panel S7-0P270. For visualisation we generated more diagrams, which had helped us at considering the behavior of the filter. Because the caracteristic of operator panel do not completely satisfing demand at the filter analysis, we made more detailed analysis with comparison of impulse response. For practical realisation, we choose elipticalfilter, cuttoff frequency was 3 Hz and sampling frequency was 50 Hz. We compared the values generated by PLC controller and values made with MATLAB. Simultaneously, we analised separately behavior of PLC controller at the input of coefficients in shortened mode and separated for input in full mode. The resu1ts are shown for mathematic model and for real controller. Alteration of the results for the shortened mode of coefficients for recursive mode of processing, is not neglible. With the same module, we realised the third order digital filter, as cascade of two second order structures. Comparision of the real values and the mathematic simulation shows very good matching between both of them. As the second example of using digital filter, we made oscilator with very low frequency. Oscilator is realised with the same circuit, but coefficients are consequently modificated, so that the circuit is out of area of stabi1ity. We shows that we can use for oscilator the same digital structure implemented in PLC controller. digitalna obdelava signalov digitalni filtri rekurzivni filtri eliptični filtri PLC krmilniki digital signal processing digital filters IIR filter eliptic filter PLC controler true true false A. Dodić Slovenski jezik Angleški jezik Magistrsko delo 2008-04-23 11:36:10 2008-04-23 11:36:10 2022-12-14 09:47:57 2022-12-15 03:10:52 2007 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.391.82:621.372.54 11954454 URN:SI:UM:DK:7P0JUBTB MAG_Dodic_Aleksandar_2009_95025518.pdf MAG_Dodic_Aleksandar_2009_95025518.pdf 1 A0B79F7A3BFA2AF4F94B384E5D908B25 08e02e98968f6091d1d99b1c2a841da1dd4d52b2c681fd071aadd441e11ca3af 6d4ca06f-7c02-11eb-bb7a-00155d0001ca 20.500.12556/dkum/12160f9c-a6cd-4753-9f8a-b296fa5b11f6 https://dk.um.si/Dokument.php?lang=slv&id=6464 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0