The Design and Simulation of an Astronomical Clock
2021
Аутори
Popkonstantinović, BranislavObradović, Ratko
Stojićević, Miša
Jeli, Zorana
Cvetković, Ivana
Vasiljević, Ivana
Milojević, Zoran
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
This paper describes and explains the synthesis of an astronomical clock mechanism which displays the mean position of the Sun, the Moon, the lunar node and zodiac circle as well as the Moon phases and their motion during the year as seen from the Earth. The clock face represents the stereographic projection of the celestial equator, celestial tropics, zodiac circle (ecliptic) and horizon for the latitude of Belgrade from the north celestial pole to the equator plane. The observed motions of celestial objects are realized by a set of clock gear trains with properly calculated gear ratios. The method of continued fraction is applied in the computation of proper and practically applicable gear ratios of the clock gear trains. The fully operational 3D model of the astronomical clock is created and the motion study of its operation is accomplished by using the SolidWorks 2016 application. The simulation results are compared with the ephemeris data and the detected differences are used to e...valuate the long-term accuracy of the astronomical clock operation. The presented methods of the clock mechanism synthesis can be useful for the design, maintenance and conservation of large-scale city astronomical clocks since these clocks represent a precious historical and cultural heritage of European civilization.
Кључне речи:
stereographic projection / motion study / mechanisms / continued fractions / CAD / astronomical clockИзвор:
Applied Sciences-Basel, 2021, 11, 9Издавач:
- MDPI, Basel
Финансирање / пројекти:
DOI: 10.3390/app11093989
ISSN: 2076-3417
WoS: 000649891900001
Scopus: 2-s2.0-85105740171
Колекције
Институција/група
Mašinski fakultetTY - JOUR AU - Popkonstantinović, Branislav AU - Obradović, Ratko AU - Stojićević, Miša AU - Jeli, Zorana AU - Cvetković, Ivana AU - Vasiljević, Ivana AU - Milojević, Zoran PY - 2021 UR - https://machinery.mas.bg.ac.rs/handle/123456789/3501 AB - This paper describes and explains the synthesis of an astronomical clock mechanism which displays the mean position of the Sun, the Moon, the lunar node and zodiac circle as well as the Moon phases and their motion during the year as seen from the Earth. The clock face represents the stereographic projection of the celestial equator, celestial tropics, zodiac circle (ecliptic) and horizon for the latitude of Belgrade from the north celestial pole to the equator plane. The observed motions of celestial objects are realized by a set of clock gear trains with properly calculated gear ratios. The method of continued fraction is applied in the computation of proper and practically applicable gear ratios of the clock gear trains. The fully operational 3D model of the astronomical clock is created and the motion study of its operation is accomplished by using the SolidWorks 2016 application. The simulation results are compared with the ephemeris data and the detected differences are used to evaluate the long-term accuracy of the astronomical clock operation. The presented methods of the clock mechanism synthesis can be useful for the design, maintenance and conservation of large-scale city astronomical clocks since these clocks represent a precious historical and cultural heritage of European civilization. PB - MDPI, Basel T2 - Applied Sciences-Basel T1 - The Design and Simulation of an Astronomical Clock IS - 9 VL - 11 DO - 10.3390/app11093989 ER -
@article{ author = "Popkonstantinović, Branislav and Obradović, Ratko and Stojićević, Miša and Jeli, Zorana and Cvetković, Ivana and Vasiljević, Ivana and Milojević, Zoran", year = "2021", abstract = "This paper describes and explains the synthesis of an astronomical clock mechanism which displays the mean position of the Sun, the Moon, the lunar node and zodiac circle as well as the Moon phases and their motion during the year as seen from the Earth. The clock face represents the stereographic projection of the celestial equator, celestial tropics, zodiac circle (ecliptic) and horizon for the latitude of Belgrade from the north celestial pole to the equator plane. The observed motions of celestial objects are realized by a set of clock gear trains with properly calculated gear ratios. The method of continued fraction is applied in the computation of proper and practically applicable gear ratios of the clock gear trains. The fully operational 3D model of the astronomical clock is created and the motion study of its operation is accomplished by using the SolidWorks 2016 application. The simulation results are compared with the ephemeris data and the detected differences are used to evaluate the long-term accuracy of the astronomical clock operation. The presented methods of the clock mechanism synthesis can be useful for the design, maintenance and conservation of large-scale city astronomical clocks since these clocks represent a precious historical and cultural heritage of European civilization.", publisher = "MDPI, Basel", journal = "Applied Sciences-Basel", title = "The Design and Simulation of an Astronomical Clock", number = "9", volume = "11", doi = "10.3390/app11093989" }
Popkonstantinović, B., Obradović, R., Stojićević, M., Jeli, Z., Cvetković, I., Vasiljević, I.,& Milojević, Z.. (2021). The Design and Simulation of an Astronomical Clock. in Applied Sciences-Basel MDPI, Basel., 11(9). https://doi.org/10.3390/app11093989
Popkonstantinović B, Obradović R, Stojićević M, Jeli Z, Cvetković I, Vasiljević I, Milojević Z. The Design and Simulation of an Astronomical Clock. in Applied Sciences-Basel. 2021;11(9). doi:10.3390/app11093989 .
Popkonstantinović, Branislav, Obradović, Ratko, Stojićević, Miša, Jeli, Zorana, Cvetković, Ivana, Vasiljević, Ivana, Milojević, Zoran, "The Design and Simulation of an Astronomical Clock" in Applied Sciences-Basel, 11, no. 9 (2021), https://doi.org/10.3390/app11093989 . .