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Gas-Liquid Ratio Imbalance Indicators of a Fighter Aircraft Shock Absorber

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Standard

Gas-Liquid Ratio Imbalance Indicators of a Fighter Aircraft Shock Absorber. / Heininen, Arttu; Aaltonen, Jussi; Koskinen, Kari; Huitula, Juha.

Engineering Assets and Public Infrastructures in the Age of Digitalization: Proceedings of the 13th World Congress on Engineering Asset Management. ed. / Jayantha P. Liyanage; Joe Amadi-Echendu; Joseph Mathew. Springer, 2020. p. 723-730 (Lecture Notes in Mechanical Engineering).

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Harvard

Heininen, A, Aaltonen, J, Koskinen, K & Huitula, J 2020, Gas-Liquid Ratio Imbalance Indicators of a Fighter Aircraft Shock Absorber. in JP Liyanage, J Amadi-Echendu & J Mathew (eds), Engineering Assets and Public Infrastructures in the Age of Digitalization: Proceedings of the 13th World Congress on Engineering Asset Management. Lecture Notes in Mechanical Engineering, Springer, pp. 723-730 , World Congress on Engineering Asset Management, 1/01/00. https://doi.org/10.1007/978-3-030-48021-9_80

APA

Heininen, A., Aaltonen, J., Koskinen, K., & Huitula, J. (2020). Gas-Liquid Ratio Imbalance Indicators of a Fighter Aircraft Shock Absorber. In J. P. Liyanage, J. Amadi-Echendu, & J. Mathew (Eds.), Engineering Assets and Public Infrastructures in the Age of Digitalization: Proceedings of the 13th World Congress on Engineering Asset Management (pp. 723-730 ). (Lecture Notes in Mechanical Engineering). Springer. https://doi.org/10.1007/978-3-030-48021-9_80

Vancouver

Heininen A, Aaltonen J, Koskinen K, Huitula J. Gas-Liquid Ratio Imbalance Indicators of a Fighter Aircraft Shock Absorber. In Liyanage JP, Amadi-Echendu J, Mathew J, editors, Engineering Assets and Public Infrastructures in the Age of Digitalization: Proceedings of the 13th World Congress on Engineering Asset Management. Springer. 2020. p. 723-730 . (Lecture Notes in Mechanical Engineering). https://doi.org/10.1007/978-3-030-48021-9_80

Author

Heininen, Arttu ; Aaltonen, Jussi ; Koskinen, Kari ; Huitula, Juha. / Gas-Liquid Ratio Imbalance Indicators of a Fighter Aircraft Shock Absorber. Engineering Assets and Public Infrastructures in the Age of Digitalization: Proceedings of the 13th World Congress on Engineering Asset Management. editor / Jayantha P. Liyanage ; Joe Amadi-Echendu ; Joseph Mathew. Springer, 2020. pp. 723-730 (Lecture Notes in Mechanical Engineering).

Bibtex - Download

@inproceedings{7adf70f131f04951a94e6d365600217b,
title = "Gas-Liquid Ratio Imbalance Indicators of a Fighter Aircraft Shock Absorber",
abstract = "An oleo-pneumatic shock absorber of a fighter aircraft loses some of its nitrogen charge and oil fill over time, due to leakage through seals. Usually, only gas can be added to shock absorber in line maintenance. This creates an imbalance to the ratio between gas and oil, and affects both the damping and the stiffness of the shock absorber. Measuring the gas and liquid content inside a shock absorber is infeasible. Thus, other variables that can act as indicators of an imbalance, must be identified. A coupled model of a fighter aircraft landing gear and its shock absorber is created. Using the model, landings with different sink speeds and aircraft masses has been simulated. Simulations with a standard, and later imbalanced, gas-liquid ratio are conducted. Results from these simulations are discussed and presented here, and variables that can be used as indicators of this imbalance are identified. This information can be used to potentially improve maintenance planning.",
author = "Arttu Heininen and Jussi Aaltonen and Kari Koskinen and Juha Huitula",
note = "jufoid=79273",
year = "2020",
doi = "10.1007/978-3-030-48021-9_80",
language = "English",
isbn = "978-3-030-48020-2",
series = "Lecture Notes in Mechanical Engineering",
publisher = "Springer",
pages = "723--730",
editor = "Liyanage, {Jayantha P.} and Joe Amadi-Echendu and Joseph Mathew",
booktitle = "Engineering Assets and Public Infrastructures in the Age of Digitalization",

}

RIS (suitable for import to EndNote) - Download

TY - GEN

T1 - Gas-Liquid Ratio Imbalance Indicators of a Fighter Aircraft Shock Absorber

AU - Heininen, Arttu

AU - Aaltonen, Jussi

AU - Koskinen, Kari

AU - Huitula, Juha

N1 - jufoid=79273

PY - 2020

Y1 - 2020

N2 - An oleo-pneumatic shock absorber of a fighter aircraft loses some of its nitrogen charge and oil fill over time, due to leakage through seals. Usually, only gas can be added to shock absorber in line maintenance. This creates an imbalance to the ratio between gas and oil, and affects both the damping and the stiffness of the shock absorber. Measuring the gas and liquid content inside a shock absorber is infeasible. Thus, other variables that can act as indicators of an imbalance, must be identified. A coupled model of a fighter aircraft landing gear and its shock absorber is created. Using the model, landings with different sink speeds and aircraft masses has been simulated. Simulations with a standard, and later imbalanced, gas-liquid ratio are conducted. Results from these simulations are discussed and presented here, and variables that can be used as indicators of this imbalance are identified. This information can be used to potentially improve maintenance planning.

AB - An oleo-pneumatic shock absorber of a fighter aircraft loses some of its nitrogen charge and oil fill over time, due to leakage through seals. Usually, only gas can be added to shock absorber in line maintenance. This creates an imbalance to the ratio between gas and oil, and affects both the damping and the stiffness of the shock absorber. Measuring the gas and liquid content inside a shock absorber is infeasible. Thus, other variables that can act as indicators of an imbalance, must be identified. A coupled model of a fighter aircraft landing gear and its shock absorber is created. Using the model, landings with different sink speeds and aircraft masses has been simulated. Simulations with a standard, and later imbalanced, gas-liquid ratio are conducted. Results from these simulations are discussed and presented here, and variables that can be used as indicators of this imbalance are identified. This information can be used to potentially improve maintenance planning.

U2 - 10.1007/978-3-030-48021-9_80

DO - 10.1007/978-3-030-48021-9_80

M3 - Conference contribution

SN - 978-3-030-48020-2

T3 - Lecture Notes in Mechanical Engineering

SP - 723

EP - 730

BT - Engineering Assets and Public Infrastructures in the Age of Digitalization

A2 - Liyanage, Jayantha P.

A2 - Amadi-Echendu, Joe

A2 - Mathew, Joseph

PB - Springer

ER -