VESTNIK of Samara University. Aerospace and Mechanical EngineeringVESTNIK of Samara University. Aerospace and Mechanical Engineering2542-04532541-7533Samara National Research University893210.18287/2541-7533-2021-20-2-74-82Three-dimensional inhomogeneous thermal fields of the “Photon-Amur 2.0” payload electronic board developed for nanosatellitesFominD. V.<p>Candidate of Science (Phys. & Math.), Associate Professor, Director of the Research and Educational Center</p>e-office@yandex.ruhttps://orcid.org/0000-0002-5474-5281BarulinаM. A.<p>Doctor of Science (Phys. & Math.), Head of Laboratory, Chief Researcher</p>barulina@iptmuran.ruGolikovA. V.<p>Candidate of Science (Engineering), Leading Researcher</p>golikov@iptmuran.ruhttps://orcid.org/0000-0002-4719-3255StrukovD. O.<p>Engineer of the Research and Educational Center</p>tokloo@yandex.ruGermanA. S.<p>Master's Student of the Faculty of Mathematics and Computer Science</p>dream_of_rains@mail.ruOgorodnikovA. A.<p>Student of the Faculty of Engineering and Physics</p>aleksandrogorodnikov123@gmail.comAmur State UniversityInstitute of Precision Mechanics and Control of the Russian Academy of Sciences0907202120274820907202109072021Copyright © 2021, VESTNIK of Samara University. Aerospace and Mechanical Engineering2021<p>The thermal fields of the Photon-Amur 2.0 payload electronic board developed for nanosatellites were studied. The Photon-Amur 2.0 payload consists of an electronic control board with a casing mounted in a nanosatellite and a remote panel with experimental photovoltaic converters. A modified heat balance method was used for numerical simulation of the thermal fields of the control board and the casing. The constructed model and the obtained results of the numerical simulation were verified by comparison with the thermal diagrams obtained for the Photon-Amur 2.0 electronic board under normal operating conditions. For modeling the outer space operating conditions, it was assumed that there is a vacuum outside and inside the Photon-Amur 2.0 casing, and the thermal effect is transmitted from the nanosatellite racks to the payload electronic board through the fastenings. The thermal effect is of a periodic nature with amplitude of 45 to +80<sup>○</sup>C and a period of 96 min, which approximately corresponds to the motion of a nanosatellite in a 575 km-high orbit. It was demonstrated that with such composition of the payload module, its casing can work as a passive thermoregulator of thermal fields on the electronic board of Photon-Amur 2.0. The simulation showed that the casing helps to keep the temperature on the control board in the interval of 15C to +85C, which is acceptable for the electronic components used on the payload control board.</p>Nanosatellitemodeling of thermal fieldspayload universal platformthermal fields of nanosatelliteselectronic boardsmodified heat balance methodНаноспутникмоделирование тепловых полейуниверсальная платформа полезной нагрузкитепловые поля наноспутниковэлектронные платымодифицированный метод тепловых балансов[Zayko Yu.K., Vereshchagina T.G., Dement'ev Yu.N., Krasnopeev S.V., Panasyuk M.I., Papkov A.P., Peretyat'ko O.Yu., Svertilov S.I. Results of flight tests of nano-satellites of Cubesat type launched in the frame of Moscow University programm Universat-Socrat. Materials 55's Scientific Readings in Memory of K.E. Tsiolkovsky «The Scientific Importance of K.E. Tsiolkovsky’s Works: History and Modernity». Part 1. Kaluga: Eydos Publ., 2020. P. 25-28. (In Russ.)][Panasyuk M.I., Svertilov S.I., Bengin V.V., Bogomolov V.V., Garipov G.К., Dobynde М.I., Zolotarev I.А., Kаlegaev V.V., Klimov P.А., Osedlo V.I., Peretjatko O.Yu., Petrov V.L., Podzolko М.V. Monitoring of radiation fields in near Earth space and atmosphere in new space projects of Moscow University. Book of Abstracts XI International Conference «Solar-Terrestrial Relations and Physics of Earthquakes Precursors» (September, 22-25, 2020, Paratunka, Kamchatka). Petropavlovsk-Kamchatkskiy: IKIR FEB RAS Publ., 2020. P. 157-158. (In Russ.)][Goroshko D.L., Galkin N.G., Fomin D.V., Gouralnik A.S., Vavanova S.V. An investigation of the electrical and optical properties of thin iron layers grown on the epitaxial Si(111)-(2×2)-Fe phase and on an Si(111)7×7 surface. Journal of Physics Condensed Matter. 2009. V. 21, Iss. 43. DOI: 10.1088/0953-8984/21/43/435801][Fomin D.V., Dubov V.L., Galkin K.N., Goroshko D.L., Maslov A.M., Galkin N.G., Batalov R.I., Shustov V.A. Formation, structure and optical properties of nanocrystalline BaSi2 films on Si(111) substrate. Solid State Phenomena. 2016. V. 245. P. 42-48. DOI: 10.4028/www.scientific.net/SSP.245.42][Barulina M.A., Golikov A.V., Fomin D.V., Strukov D.O. Modeling of three-dimensional inhomogeneous thermal fields of nanosatellite electronic boards. Electronic Information Systems. 2018. No. 2 (17). P. 22-30. (In Russ.)][Pyatnitskikh A.V. Decision making in the PS/104 format. Avtomatizatsiya v Promyshlennosti. 2008. No. 3. P. 40-43. (In Russ.)][Pankratov V.M., Golikov A.V., Barulina M.A., Pankratova E.V., Efremov M.V. Problem statement for practical modeling of temperature fields of gyroscopes in space navigation systems. E3S Web of Conferences. 2020. V. 224. DOI: 10.1051/e3sconf/202022402006][Dzhashitov V.E., Pankratov V.M. Datchiki, pribory i sistemy aviakosmicheskogo i morskogo priborostroeniya v usloviyakh teplovykh vozdeystviy [Sensors, devices and systems of aerospace and marine instrumentation in conditions of thermal effects]. St. Petersburg: Concern CSRI Elektropribor Publ., 2005. 404 p.]