UDK 629.78.05.017.1
EXTENDING THE LIFE OF SATELLITE ON-BOARD UNITS
N. A. Testoedov, V. V. Dvirnyi, E. A. Morozov, G. V. Dvirnyi, N. V. Eremenko*
JSC “Information satellite systems” named after academician M. F. Reshetnev” 52, Lenin Str., Jeleznogorsk, Krasnoyarsk region, 662972, Russian Federation *E-mail: erko@iss-reshetnev.ru
When units operate on-board of a high capable telecommunication satellite (SC), their life shall expectancy be enhanced. 15-year lifetime, 15kW power, tenths of transponders in С-, Ku-, Ka- and L-bands on-board a spacecraft stipulate the need to develop and to perform a ground development testing on a large amount of thermally stressed on-board units. To be able to reduce on-board units operating temperature ranges it is very important to implement a correct approach in SC thermal control subsystem (TCS) design; an example of main concepts of TCS design for a thermally stressed SC is provided. With the purpose to extend the life of SC on-board units it is necessary to ensure effective conductive paths between the units and the SC panels or SC panels skins where the units are installed. Thermal analyses for on-board units shall be performed considering different modes of units operation, using, for example, a finite-element method, available in COSMOS application of SolidWorks. To ensure long operating life of unit EEE parts used on thermally stressed SC derating of 30…50 % shall be provided. Hot and cold cases of on-board unit baseplate temperatures are being reviewed; the calculation gives the temperatures from minus 10 to plus 40 оС for EEE parts. On-board units’ reliability directly depends on their life expectancy, which, in its turn, depends on the thermal resistance processes occurring within them. A review of theoretical estimation has been provided. The results of the calculations performed for on-board units correlate well with the results of the ground tests and are validated by the results of successful operation of powerful communications satellites such as Express-AM5 and Express-AM6. The paper demonstrates the results of accurate measurements in the temperature range from minus 100 to plus 100 оC done under thermal vacuum for a typical printed circuit board used within an onboard unit designed and manufactured by JSC ISS.
on-board units extended life expectancy, ground testing, thermally stressed units, thermal control subsystem, thermal strength.
References
- [Reliability of satellite in the modern environment]. Novosti kosmonavtiki. 2014, Vol. 24, No. 02 (373), P. 56–59 (In Russ.).
- [Express-AM6. Replenishment of the telecom satellite orbital constellation]. Sibirskii sputnik ISS-Reshetnev. 2014, No. 15 (369), P. 1 (In Russ.).
- [A new satellite for the Russian satellite orbital constellation]. Sibirskii sputnik ISS-Reshetnev. 2015, No. 4 (377), P. 1 (In Russ.).
- SESAT sputnik. [SESAT Satellite]. Wikipedia, the free encyclopedia. Available at: https://ru.wikipedia.org/wiki/Sesat_(%F1%EF%F3%F2%ED%E8%EA) (accessed 01.04.2015).
- Dul’nev G. N., Semyashkin E. M. Teploobmen v radioelektronnykh apparatakh [Heat transfer in avionics]. Moscow: Energiya, 1968. 361 p.
- Kondrat’ev G. M., Dul’nev G. N, Platunov E. S.et al. [Heat transfer in unit design]. Prikladnaya fizika. St.Petersburg: SPbGU ITMO, 2003. 560 p.
- Spacecraft Thermal Control Handbook Volume I: Fundamental Technologies. Edited by David G. Gilmore.–2nd ed. American Institute of Aeronautics and Astronautics (AIAA), Reston, Virginia, 2002, 836 p.
- Suntsov S. B., Alekseev V. P., Karaban V. M. et al. Prognozirovanie nadezhnosti uzlov i blokov radiotekhnicheskikh ustroistv kosmicheskogo naznacheniya na osnove modelirovaniya napryazhenno-deformiruemykh sostoyanii [Prediction of reliability for spacecraft avionics on the basis of modelling] Tomsk, Tomsk State University of Control Systems and Radioelectronics Publ., 2012, 114 p.
- Arzamasov B. N., Makarova V. I., Mukhin G. G.et al. Materialovedenie [Materials science]. College textbook. 7th ed. Moscow, Moscow State Technical University Publ., 2005, 648 p.
- Sobolev N. D., Egorov V. I. [Thermal fatigue and thermal shock]. Prochnost' i deformatsiya v neravnomernykh temperaturnykh polyakh [Strength and distortion in uneven temperature fields]. Moscow, Gosatomizdat Publ., 1962, P. 94–183.
- Shapovalov L. A. [Thermal strength of plates and shells]. Prochnost' i deformatsiya v neravnomernykh temperaturnykh polyakh [Strength and distortion in uneven temperature fields]. Moscow, Gosatomizdat Publ., 1962, P. 241–255.
- [Basics to estimate yield for unevenly temperature stressed parts]. Prochnost' i deformatsiya v neravnomernykh temperaturnykh polyakh [Strength and distortion in uneven temperature fields]. Moscow, Gosatomizdat Publ., 1962, P. 183–239.
- Kartashov E. M. Analiticheskie metody v teorii teploprovodnosti tverdykh tel [Analytical methods in rigid bodies thermal conductivity theory]. 3rd ed. Moscow, Vysshaya shkola Publ., 2001, 550 p.
- Samarskii A. A., Babishchevich P. N. Vychislitel'naya teploperedacha [Calculated thermal transfer]. Moscow, Editorial URSS Publ., 2003, 784 p.
- Dorokhov A. R., Zavorin A. S., Kazanov A. M. et al. Modelirovanie teplovydelyayushchikh sistem [Modeling of dissipating systems]. Tomsk, NTL Publ., 2000, 233 p.
- Belyaev N. M., Ryadno A. A. Metody teorii teploprovodnosti [Thermal conductivity theory methods]. Two vol.. Moscow, Vysshaya shkola Publ., 1982, 327 p.
- Zarubin V. S. Inzhenernye metody resheniya zadach teploprovodnosti [Engineering methods to solve thermal conductivity aspects]. Moscow, Energoatomizdat Publ., 1983, 326 p.
- Temnikov A. V., Slesarenko A. P. Sovremennye priblizhennye metody resheniya zadach teploobmena [Advanced methods of approximate problem solving on heat transfer]. Samara, SamPI Publ., 1991, 88 p.
- Samarskii A. A. Chislennye metody matematicheskoi fiziki [Mathematical physics numerical methods]. Moscow: Nauchnyi mir, 2000, 316 p.
- Khalimanovich V. I. et al. [Communication and navigation satellite honeycomb panels. Experience in design and manufacturing]. Effektivnost' sotovykh konstruktsii v izdeliyakh aviatsionno-kosmicheskoi tekhniki [Efficiency of aircraft/spacecraft honeycomb structures]. 3rd international workshop package, Dnepropetrovsk, May, 27–29, 2009. Ukr. NII tekhnologii mashinostroeniya. Dnepropetrovsk, 2009, P. 161–171 (In Russ.).
Testoedov Nikolai Alekseevich – Dr. Sc., Associate Member of RAS, Professor, Director General of JSC “Information Satellite System” named after academician M. F. Reshetnev”. E-mail: office@iss-reshetnev.ru
Dvirnyi Valeryi Vasilyevich – Dr. Sc., Professor, intellectual property discovery and protection chief specialist, JSC “Information Satellite System” named after academician M. F. Reshetnev”. E-mail: dvirnyi@iss-reshetnev.ru
Morozov Egor Aleksandrovich – head of Information technology department, JSC “Information Satellite System” named after academician M. F. Reshetnev”. E-mail: morozov@iss-reshetnev.ru
Dvirnyi Guryi Valeryevich – Cand. Sc., associate engineer for commissioning and testing, JSC “Information Satellite System” named after academician M. F. Reshetnev”. E-mail: dg1802@mail.ru
Eremenko Natalya Valeryevna – Master’s Degree student, Siberian Federal University, interpreter,
JSC “Information Satellite System” named after academician M. F. Reshetnev”. E-mail: erko@iss-reshetnev.ru