Konstruiranje i karakterizacija uređaja za žetvu vibracijske energije

undergraduate thesis

• Title (english): Design and characterisation of a vibration energy harvester
• Author: Mislav Vučinić
• Mentor: Neven Alujević (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2021-02-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; General Mechanical Engineering (Construction)

Abstract

U ovom završnom radu konstruiran je uređaj za žetvu vibracijske energije. Mehanički dijelovi uređaja konstruirani su tako da budu pogodni za izradu tehnologijom 3D ispisa i to upotrebom 3D pisača, Prusa i3 MK3S. Uređaj je tako konstruiran da se njegov dinamički odziv može dobro aproksimirati matematičkim modelom za linearni vibracijski sustav s jednim stupnjem slobode gibanja. To je postignuto korištenjem računalnih CAD/CAM alata za modeliranje i konstruiranje, kao i alata za analizu slobodnih vibracija mehaničkih sustava s raspodijeljenim parametrima metodom konačnih elemenata. Uređaj je konstruiran tako da je njegov dinamički odziv dominantno određen jednom vlastitom frekvencijom i jednom osnovnom formom vibriranja. Uzeto je u obzir da prva vlastita frekvencija sustava bude 20 Hz ili niža. Nadalje, uređaj je osmišljen na način da se za pretvorbu mehaničke energije u električnu koriste dva paralelno povezana elektrodinamička pretvornika PBA Systems CVC40–HF–6.5. Konačna konstrukcija je izrađena, sklopljena a zatim okarakterizirana mjerenjem prijenosne funkcije na slobodno ovješenom uređaju između napona narinutog na terminale zavojnice jednog od pretvornika i napona induciranog na terminalima zavojnice drugog pretvornika.

Abstract (english)

This thesis deals with design and characterisation of a vibration energy harvester. Mechanical parts of the device are designed in such a way that they can be manufactured using 3D printing technology, in particular, using Prusa i3 MK3S 3D printer. The device has been designed in such a way that its dynamic response can be well approximated using a mathematical model assuming a one degree of freedom linear mechanical system. This is achieved by using CAD/CAM tools for modelling of the mechanical parts of the device, and Finite Element Method (FEM) tools for free vibration analysis of the flexible mechanical parts of the device. The energy harvester is designed so that its dynamic response is markedly characterised by one natural frequency and one vibration mode. A low natural frequency of 20 Hz or lower of the fundamental mode of the device is targeted. Furthermore, the harvester has been designed so that two electrodynamic transducers PBA Systems CVC40–HF–6.5 mounted in parallel can be used for the transduction of mechanical into electrical energy. The final design has been manufactured, assembled and characterised by measuring the frequency response function between the voltage applied to electrical terminals of one of the two transducers and the voltage induced on the electrical terminals of the other transducer.

• Keywords: 3D ispis; Linearni vibracijski sustav; Vibracije; Vlastite frekvencije; Forme vibriranja; Elektrodinamika; Elektrodinamički pretvornici; Žetva vibracijske energije; Pretvorba energije
• Keywords (english): 3D printing; Linear vibration system; Vibrations; Natural frequencies; Mode shapes; Electrodynamics; Electrodynamic transducers; Vibration energy harvesting; Energy transduction
• Language: croatian
• URN:NBN: urn:nbn:hr:235:913275
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-02-19 14:54:55