### On the functional reliability of the regenerative life support systems for manned spacecraft

**Published:**10.06.2020

**Authors:** Glebov I.V., Mitryukhin A.D.

**Published in issue: **#6(102)/2020

**DOI: **10.18698/2308-6033-2020-6-1987

**Category:** Aviation and Rocket-Space Engineering | **Chapter:** Design, construction and production of aircraft

The paper considers two classes of problems concerned with reliability of manned spacecraft regenerative life-support system (RLSS) on the stages of design, testing and operation, as well as the approach to the definition of “functional reliability” as a component of the general reliability theory as opposed to the “structural reliability”. General methods for calculating the reliability of technological systems at all stages of their life cycle are considered. Mathematical models of functional, structural, and overall reliability of a manned spacecraft RLSS are proposed. Based on the results of independent tests of the carbon dioxide processing system, calculations of the functional reliability of the unit for the hydrogenation of carbon dioxide are performed. The unit is being developed for use in the manned spacecraft RLSS. The article also presents the conclusions on the analysis of the results of the calculation of functional reliability for the carbon dioxide hydrogenation unit.

**References**

**[1]**Makhitko V.P., Zaskanov V.G., Savin M.V. Izvestiya Samarskogo nauchnogo tsentra Rossiyskoy akademii nauk — Izvestia of Samara Scientific Center of the Russian Academy of Sciences, 2011, vol. 13, no. 6, pp. 293–299.

**[2]**Shubinsky I.B. Funktsionalnaya nadezhnost informatsionnykh sistem. Metody analiza [Functional reliability of information systems. Methods of analysis]. Moscow, “Zhurnal Nadezhnost” Publ., 2012, 296 p.

**[3]**Garanin A.I. Informatsionnye tekhnologii v nauke, obrazovanii i upravlenii (Information technology in science, education and management), 2008, no. 2, pp. 45–50.

**[4]**GOST 24.701–86. Nadezhnost avtomatizirovannykh sistem upravleniya. Osnovnyye polozheniya [State Standard 24.701–86. Reliability of automated control systems. The main provisions]. Moscow, Standartinform Publ., 2009.

**[5]**Glebov I.V., Kurmazenko E.A., Romanov S.Yu., Zheleznyakov A.G. Trudy MAI (Proceedings of Moscow Aviation Institute), 2014, no. 73, pp. 5–8. Available at: http://trudymai.ru/published.php?ID=48477 (accessed March 16, 2020).

**[6]**Glebov I.V., Kogan I.L. Kosmicheskaya nauka i tekhnologiya — Space Science and Technology, 2017, no. 4 (19), pp. 89–94.

**[7]**Gnedenko B.V., Belyayev Yu.K., Solovyev A.D. Matematicheskie metody v teorii nadezhnosti: Osnovnye kharakteristiki nadezhnosti i ikh statisticheskiy analiz [Mathematical methods in the theory of reliability: The main characteristics of reliability and their statistical analysis]. Moscow, Librokom Publ., 2013.

**[8]**Shubinsky I.B. Strukturnaya nadezhnost informatsionnykh sistem. Metody analiza [Structural reliability of information systems. Methods of analysis]. Moscow, “Zhurnal Nadezhnost” Publ., 2012, 216 p.

**[9]**Kobzar A.I. Prikladnaya matematicheskaya statistika. Dlya inzhenerov i nauchnykh rabotnikov [Applied Mathematical Statistics. For engineers and scientists]. Moscow, Fizmatlit Publ., 2006, 816 p.

**[10]**Glebov I.V., Kogan I.L. Kosmicheskaya nauka i tekhnologiya — Space Science and Technology, 2018, no. 3 (22), pp. 113–119.