Identifikacija napak izdelkov na podlagi vibracijskega odziva

Zupančič, Matjaž (author), Slavič, Janko (mentor), Boltežar, Miha (co-mentor)

Zaradi nenehnega povečevanja produktivnosti izdelkov in s tem otežene kontrole izdelkov je smiselno uvajanje novih rešitev na tem področju. S pomočjo električnega ali mehanskega vzbujanja komponent ter analizo dinamičnega odziva lažje določamo napake izdelka. Delo prikazuje osnove ter uporabo programskega jezika LabVIEW za generiranje, zajemanje električnih signalov ter obdelavo podatkov. Sledi pregled teorije mehanskega nihanja, osnove dinamskih sistemov z eno prostostno stopnjo. V nadaljevanju so predstavljene osnove merjenja in zajemanja dinamičnih veličin ter osnove procesiranja podatkov. Na koncu je predstavljen merilni sistem, s katerim merimo končni izdelek v obliki jeklenega nosilca, na katerem je privijačena plošča. Dinamski sistem vzbujamo s sinusnim preletom v obliki mehanskega nihanja z določenim frekvenčnim območjem. Na podlagi momenta privitja plošče merimo odziv sistema z analizo sprememb lastnih frekvenc. V zaključku dela so predstavljeni rezultati ter opažanja pri spreminjanju momenta privitja plošče.

• Language: Slovenian
• Keywords: LabVIEW, nihanje, merjenje, generiranje signalov, procesiranje signalov, Fourierova transformacija
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [M. Zupančič]
• Year: 2019
• Number of pages: XXI, 55 str.
• PID: 20.500.12556/RUL-111785
• UDC: 534.1:531.7:004.43(043.2)
• COBISS.SI-ID: 16977179
• Publication date in RUL: 13.10.2019

Secondary language

• Language: English
• Title: Product failure identification with vibration response analysis

Abstract

Due to increasing production growth and consequently more complicated quality control it is reasonable to improve quality control methods. Analysing dynamic response by electrical or mechanical excitation methods increases the reliability of finding faults in products. Section 2 presents the basics of LabVIEW program, used for generating, acquiring electric signals and later data processing. Section 3 presents the basic theory of mechanic oscillations of systems with one degree of freedom. Section 4 presents the theory of signal acquisition and signal processing. Section 5 presents the experimental work, where a steel beam and a bolt-jointed steel block are researched under sine-sweep excitation. The results are presented in section 6 where the impact of bolt fixation-toque on the natural dynamics is presented.

• Keywords: LabVIEW, oscillation, measuring, signal generation, signal processing, Fourier transformation