Gas-Liquid Ratio Imbalance Indicators of a Fighter Aircraft Shock Absorber
Tutkimustuotos › › vertaisarvioitu
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. toim. / Jayantha P. Liyanage; Joe Amadi-Echendu; Joseph Mathew. Springer, 2020. s. 723-730 (Lecture Notes in Mechanical Engineering).Tutkimustuotos › › vertaisarvioitu
Harvard
APA
Vancouver
Author
Bibtex - Lataa
}
RIS (suitable for import to EndNote) - Lataa
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 -