zaključna naloga Razvojno raziskovalnega programa I. stopnje Strojništvo
Jan Fratnik Kobe (Author), Miha Boltežar (Mentor), Martin Česnik (Co-mentor)

Abstract

V zaključni nalogi je obravnavan problem masnega neuravnoteženja togega rotorja pri vrtenju okoli stalne osi, zaradi katerega se na ležajnih mestih pojavijo dinamične sile, ki povzročajo vibracije in hrup. V prvem delu smo v programskem jeziku Python pripravili programsko kodo, ki zajet signal iz silomerov filtrira, nato pa na podlagi poznanih sil v ležajih omogoča odpravo oz. zmanjšanje neuravnoteženosti rotorja. Signal je bilo potrebno najprej filtrirati zaradi šuma, za kar smo uporabili Butterworthov tip filtra iz knjižnice SciPy. V nadaljevanju smo realni rotor s pomočjo izdelanega programa uravnotežili, nato pa smo z uporabo dodatnih mas namerno povzročili neuravnoteženost in jo poskušali v nekaj iteracijah odpraviti. V nalogi je prikazano, da lahko z ustreznimi postopki odvzemanja ali dodajanja materiala znatno zmanjšamo sile pri vrtenju togega telesa.

Keywords

diplomske naloge;rotacija togega telesa;masno uravnoteževanje;analogno-digitalna pretvorba;fourierjeva transformacija;obdelava signalov;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FS - Faculty of Mechanical Engineering
Publisher: [J. Fratnik Kobe]
UDC: 531:533.662.5(043.2)
COBISS: 27608067 Link will open in a new window
Views: 1172
Downloads: 180
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: Mass balancing of the rigid rotor through force measurements on bearings
Secondary abstract: In this thesis is discussed a problem of mass imbalance of the rigid rotor when rotating around fixed axis, due to which dynamic forces appear at the bearing points, causing vibrations and noise. Firstly, based on the known forces in the bearings, a script in Python programming language was written, which eliminates or reduces the rotor imbalance. The real measured signal had to be filtered beforehand, because of the noise present. For that the Butterworth type of filter from the SciPy library was used. Secondly, the actual rotor was balanced with the developed program. Then, an imbalance was deliberately caused with the use of additional masses and the resulting imbalance was reduced in few iterations. The thesis shows, that with appropriate process of removing or adding material, the forces in the rotation of a rigid body can be significantly reduced.
Secondary keywords: thesis;rotation of rigid body;mass balancing;analog to digital conversion;fourier transform;signal processing;
Type (COBISS): Final paper
Study programme: 0
Thesis comment: Univ. v Ljubljani, Fak. za strojništvo
Pages: XIV, 29 f.
ID: 12008214
Recommended works:
, zaključna naloga Razvojno raziskovalnega programa I. stopnje Strojništvo
, diplomsko delo Visokošolskega strokovnega študijskega programa I. stopnje Strojništvo
, no subtitle data available
, magistrsko delo
, zaključna naloga Univerzitetnega študijskega programa I. stopnje Strojništvo - Razvojno raziskovalni program