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Verification of the model of the process of operation of measuring gas analytical systems for special purposes

Keywords:

O.A. Kanischev – Deputy Head of Designing Department №78, SUE «SPA Analitpribor» (Smolensk)
E-mail: asuspost@rambler.ru


Measuring gas analytical systems of special purpose (MGAS) used to ensure industrial safety requirements for the operation of a ha-zardous production facility, environmental monitoring, ensuring safe conditions and labor protection, and technological control.
Given the increased requirements for reliability and durability, as well as the complexity of the structure of the MGAS itself, the de-velopment of recommendations for improving the system of operation is a complex scientific task. The solution of this problem is im-possible without the development of a mathematical model of the functioning of MGAS in the process of operation and its verification when changing both own (internal) parameters and external conditions (factors). First, it is necessary to consider the interaction of MGAS with the maintenance and repair system. At the same time, the main feature of this interaction is the elimination of malfunctions during maintenance.
Under the model of operation in the course of operation will be understood the model of expenditure of the MGAS resource under the influence of external factors with its own performance indicators established (assigned).
One of the most promising directions of modeling the operation of systems of a corresponding complexity MGAS is the use of the theory of semi-Markov processes, which allows more complete, in comparison with Markov processes, to take into account the variety of probabilistic processes occurring in the interaction of the operation system and the technical system.
In the paper, the results of verification of the operation model for measuring special-purpose gas analysis systems based on the theory of semi-Markov processes are considered. The proposed model of the process of operation of gas analytical systems allows one to take into account the influence of the frequency of replacement, the intensity of operation and the provision of spare parts, and the measurement gas analysis systems of a special purpose can be improved.
Verification of the obtained model allowed:
First, to develop a methodology for justifying the frequency of replacement, the intensity of operation and the provision of spare parts of MGAS, which, unlike known ones, is based on the first developed mathematical model of the operation process and allows determining the optimum values of the above operating parameters.
Secondly, to offer a technique for calculating the provision of spare parts, which is reduced to the iterative calculation of the probability of rejecting the entire volume of available spare parts, with the addition of one spare element in its composition for each iteration step. After each step of the iteration, the probabilities of the failure of spare parts compared and a decision made as to whether further replen-ishment of spare parts is advisable, i.e. if a significant increase in the probability of failure of spare parts has not occurred, then further increase in the volume of spare parts should stopped.
Secondly, to offer a technique for calculating the provision of spare parts, which is reduced to the iterative calculation of the probability of rejecting the entire volume of available spare parts, with the addition of one spare element in its composition for each iteration step. After each step of the iteration, the probabilities of the failure of spare parts compared and a decision made as to whether further replen-ishment of spare parts is advisable, i.e. if a significant increase in the probability of failure of spare parts has not occurred, then further increase in the volume of spare parts should stopped.
Thirdly, to develop recommendations for including the values of the above parameters of the operation process in the MGAS instruction manual, which, in contrast to the known ones, based on the methodology for justifying the periodicity of replacement, the intensity of operation and the provision of spare parts, and improve the operational efficiency of MGAS.
Thus, the obtained semi-Markov model is the required model of the MGAS operation process, which allows take into account the effect of the replacement periodicity. The level of reliability and maintainability, and the intensity of operation and control of the availability of spare parts for reliability and allows study the nature of this influence in order to obtain their optimum values.

References:
  1. GOST P. 50760-95. Analizatory’ gazov i ae’rozolej dlya kontrolya atmosfernogo vozduxa. Obshhie texnicheskie usloviya. M.: Izd-vo standartov. 2008. 14 s.
  2. GOST P. 52136-2003 Gazoanalizatory’ i signalizatory’ goryuchix gazov i parov e’lektricheskie. Chast’ 1. Obshhie trebovaniya i metody’ ispy’tanij. M.: Izd-vo standartov. 2012. 28 s.
  3. GOST P. 52350.29.1 2010. Vzry’voopasny’e sredy’. Chast’ 29 1. Gazoanalizatory’. Obshhie texnicheskie trebovaniya i metody’ ispy’tanij gazoanalizatorov goryuchix gazov. M.: Izd-vo standartov. 2003. 12 s.
  4. GOST 27540-87 Signalizatory’ goryuchix gazov i parov termoximicheskie. Obshhie texnicheskie usloviya. M.: Izd-vo standartov. 2001. 22 s.
  5. GOST P. 52350.29.2 2010 (ME’K 60079-29 2:2007) Vzry’voopasny’e sredy’. Chast’ 29 2. Gazoanalizatory’. Trebovaniya k vy’boru, montazhu, primeneniyu i texnicheskomu obsluzhivaniyu gazoanalizatorov goryuchix gazov i kisloroda. M.: Izd-vo standartov. 2001. 14 s.
  6. GOST IEC 60079-29-3-2013 Vzry’voopasny’e sredy’. Chast’ 29 3. Gazoanalizatory’. Rukovodstvo po funkczional’noj bezopasnosti staczionarny’x gazoanaliticheskix sistem. M.: Izd-vo standartov. 2014. 24 s.
  7. Barzilovich E.Yu., Belyaev Yu.K., Kashtanov V.A. i dr. Voprosy’ matematicheskoj teorii nadezhnosti. M.: Radio i svyaz’. 1983. 376 s.
  8. Dedkov V.K., Severczev N.A. Osnovny’e voprosy’ e’kspluataczii slozhny’x sistem. M.: Vy’sshaya shkola. 1976. 406 s.
  9. Mishhenko V.I. Analiz podxodov k modelirovaniyu proczessa e’kspluataczii slozhny’x texnicheskix sistem // Vestnik akademii voenny’x nauk. 2002. № 3−4. S. 34−38.
  10. Mishhenko V.I. Osobennosti modelirovaniya vzaimodejstviya slozhny’x texnicheskix sistem vooruzheniya s sistemoj ix e’kspluataczii // Izmeritel’naya texnika. 1999. № 10. S. 16−21.
  11. Mishhenko V.I. Opredelenie periodichnosti obsluzhivaniya vooruzheniya na osnove ispol’zovaniya polumarkovskix modelej proczessa ego e’kspluataczii // Voprosy’ oboronnoj texniki. 1990. № 3(77). № (78). Ser. 14.
  12. Lavrinenko V.Yu. Osnovy’ e’kspluataczii radioe’lektronnoj apparatury’. M.: Vy’sshaya shkola. 1978. 320 s.
  13. Nadezhnost’ texnicheskix sistem. Spravochnik / Pod obshh. red. I.A. Ushakova. M.: Radio i svyaz’.1985. 608 s.
  14. Barlou R., Proshan F. Statisticheskaya teoriya nadezhnosti i ispy’taniya na bezotkaznost’: Per. s angl. M.: Nauka. Gl. red. fiz.-mat. lit-ry’. 1984. 328 s.
  15. Golovin I.N., Chuvary’gin B.V., Shura-Bura A.E’. Raschet i optimizacziya komplektov zapasny’x e’lementov radioe’lektronny’x sistem. M.: Radio i svyaz’. 1984. 176 s.
  16. Mishhenko V.I., Xramov M.Yu. Problematika e’kspluataczii slozhny’x texnicheskix sistem. Spb.: Politexnika-servis. 2016. 172 s.
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