20.500.12556/RUL-100938 Modalna analiza na podlagi meritev pomikov s hitro kamero Modal analysis based on motion measurements with a high-speed camera To delo obravnava uporabo kamer za meritev polnega polja dinamskih odzivov struktur. Strukture, predvsem pri višjih frekvencah, nihajo z zelo majhnimi amplitudami pomikov in so ti težko zaznavni s kamerami, poleg tega meritve s kamerami predstavljajo velike količine podatkov, katere je potrebno analizirati v smiselnem času. V delu je predstavljen pregled nekaterih metod identifikacije pomikov iz slik in metod identifikacije modalnih parametrov. Raziskani so vplivni parametri in potenciali meritev s hitrimi kamerami. Najpomembnejši izsledki raziskav so določitev potenciala ločljivosti premikov, hibridna modalna identifikacija odziva pod nivojem šuma in razvit merilni postopek za meritve spektralnih komponent nihanja s klasičnimi kamerami. This work discusses the use of cameras for measurements of dynamic structural responses. Structures oscillate with very small displacement amplitudes, particularly so at high frequencies, which are hard to measure with cameras. Camera measurements also produce large amounts of data, which should be analysed in a reasonable amount of time. A review of some of the Optical Flow methods used to identify displacements from videos and some modal parameter identification techniques is presented. The influential parameters and the potential of high-speed camera measurements are discussed. The greatest contributions of this work are the determination of the displacement resolution potential, the hybrid modal identification below the camera's noise floor and the developed measurement technique for identification of individual displacement spectral components from images produced by still-frame cameras. optični tok hitra kamera modalna analiza fotogrametrija identifikacija modalnih parametro Optical Flow High-speed camera Modal Analysis Photogrammetry Modal Parameter Identification true false false Slovenski jezik Angleški jezik Doktorsko delo/naloga 2018-04-25 07:45:08 2018-04-25 07:45:19 2023-06-16 10:15:20 0000-00-00 00:00:00 2018 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 204450 16026907 1542.pdf 1542.pdf 1 E74D1968BD84B040D08F3E6B69E1ACAE 5bec495bd8d9e34dcd176f4522d2764140e9c819b40e204941d29293d65f7edf 26a2e77b-a1b5-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=110777 Fakulteta za strojništvo 0 0 0