Prediction of dependability for soft landing system with air dampers with Monte Carlo method

DOI: 10.34759/trd-2020-115-03

Аuthors

Averyanov I. O.

Moscow design industrial complex "MKPK "Universal", 79A, Altufevskoe shosse, Moscow, 127410, Russia

e-mail: i.averyanov@mail.ru

Abstract

There are a lot of researches related to soft landing systems with air dampers (System). Today it is a trend to use numerical simulation with LS-DYNA Airbag module or fluid-structure interaction methods. But almost all of the researches are related to single landing process simulation. The article describes the developed dependability model of landing process for soft landing systems with air dampers.

This dependability model is based on physical model of landing process for soft landing systems with air dampers; it consists of mathematical model of fabric air dampers comes from and equations of rigid body motion – from. This physical model allows to get gradient landing area and position of the System in 3D space as initial conditions.

Monte Carlo method is used to realize mathematical experiments with random values of applied load factors. These factors are: landing area gradient angle, vertical velocity and mass of the system, horizontal velocity vector. Reliability function is used as a dependability measure. The following failure modes are considered: excessive acceleration, temp acceleration growing, final vertical velocity, system overturn of its excessive vertical jump, air damper failure.

Several thousand cases of mathematical landings with random initial conditions are considered to get statisitcs of their failures. It allows to get the reliability function of the whole landing process.

The case of air dampers efficiency improvement with the use of the developed model is considered. The idea is to use reliability function of the landing process as an optimization criteria for air damper structure – number of release valves and their combination in the air damper chambers are considered as target function.

Presented results show that the use of the developed model may be useful in design study of soft landing systems with fabric air dampers.

Keywords:

air damper, soft landing system, dropped cargo landing, dependability model of landing process

References

1. Fedoseev S.L. Tekhnika i vooruzhenie, 2011, no. 2, pp. 2 – 10.

2. Sredstva parashyutnogo desantirovaniya gruzov i tekhniki. GOST 21453-75 (Parachute landing for cargo and technique. Terms and definitions GOST 21453-75), Moscow, Izdatel’stvo standartov, 1975. URL: http://docs.cntd.ru/document/1200009368

3. Emel’yanov Yu.N., Pavlov A.S., Titov V.A. Proektirovanie sistemy myagkoi posadki prizemlyayushchegosya ob“ekta (Developing of soft landing system), Moscow, Izd-vo MAI, 1988, 62 p.

4. Tryamkin A.V., Emel’yanov Yu.N. Trudy MAI, 2000, no. 1. URL: http://trudymai.ru/eng/published.php?ID=34731

5. Komarov S.S., Miskaktin N.I., Tsvileneva N.Yu. Trudy Instituta mekhaniki Ufimskogo nauchnogo tsentra RAN, 2003, vol. 3, pp. 60 – 71.

6. Ponomarev P.A., Skidanov S.N., Timokhin V.A. Trudy MAI, 2000, no. 2. URL: http://trudymai.ru/eng/published.php?ID=34708

7. Ponomarev P.A. Issledovanie i vybor ratsional’nykh parametrov pnevmaticheskogo amortizatora dlya posadki distantsionno-pilotiruemykh letatel’nykh apparatov (Analysis and choice of rational parameters of pneumatic shock absorber for the landing aircrafts), Doctor’s thesis, Moscow, MAI, 2000, 145 p.

8. Aver’yanov I.O., Zinin A.V., Shirobokov V.V. Materialy XXII Mezhdunarodnogo simpoziuma “Dinamicheskie i tekhnologicheskie problemy mekhaniki konstruktsii i sploshnykh sred” imeni A.G. Gorshkova, Moscow, Izd-vo TRP, 2016, pp. 14 – 16.

9. Aver’yanov I.O., Suleimanov T.S., Tarakanov P.V. Trudy MAI, 2017, no. 92. URL: http://trudymai.ru/eng/published.php?ID=77448

10. Qu Pu, Yang Zhen, Shi Rui. Research on Airbags Landing System for Airborne Vehicle Airdrop, Journal of Information and Computational Science, 2015, vol. 12 (5), pp. 2035 – 2042. DOI: 10.12733/jics20105798

11. Per-Olof Marklund, Larsgunnar Nilsson. Simulation of airbag deployment a coupled fluid-structure approach, 7th International LS-Dyna Users Conference, 2002. URL: https://www.dynalook.com/conferences/international-conf-2002

12. Yves de Lassat de Pressigny, Vincent Lapoujade. Numerical simulation of ground impact after airdrop, 5th European LS-Dyna Users Conference, 2005. URL: https://www.dynalook.com/conferences/european-conf-2005

13. Yves de Lassat de Pressigny, Thierry Baylot. Simulation of the impact on ground of airdrop loads to define a standard worst case test, 6th European LS-Dyna Users Conference, 2007. URL: https://www.dynalook.com/conferences/european-conf-2007

14. Anthony P. Taylor, Richard Benney, Brian Bagdonovich. Investigation of the application of airbag technology to provide a softlanding capability for military heavy airdrop, 16th AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, May 2001. DOI: 10.2514/6.2001-2045

15. Masoud Alizadeh, Ahmad Sedaghat, Ebrahim Kargar. Shape and Orifice Optimization of Airbag Systems for UAV Parachute Landing, International Journal of Aeronautical and Space Sciences, 2014. DOI 10.5139/IJASS 2014.15.3.335

16. Nadezhnost’ v tekhnike. Terminy i opredeleniya GOST 27.002-2015 (Dependability in technics. Terms and definitions. GOST 27.002-2015), Moscow, Standartinform, 2016. URL: http://docs.cntd.ru/document/1200136419

17. Klyuev V.V., Bolotin V.V., Sosnin F.R. Mashinostroenie. Entsiklopediya. Nadezhnost’ mashin (Mechanical engineering. Encyclopedia. Dependability in technics), Moscow, Mashinostroenie, 2003, vol. IV-3, 592 p.

18. Lebedev A.A., Chernobrovkin L.S. Dinamika poleta (Flight dynamics), Moscow, Mashinostroenie, 1973, 616 p.

19. Sobol’ I.M. Metod Monte-Karlo (Monte Carlo method), Moscow, Izd-vo Nauka, 1968, 64 p.

20. Akopov M.G. Nadezhnost’ sistem oborudovaniya (Systems reliability), Moscow, Izd-vo MAI, 2015, 96 p.

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