Effects of Pitch Stabilization Buffer on the Dynamic Performance of Frame-Type Landing Gear

During the landing and taxiing process of aircraft, the frame-type landing gear (FTLG) usually generates large pitch vibrations under external excitation. Excessive vibration increases localized loads on the landing gear, which may lead to localized failure of the structure. To minimize this undesir...

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Bibliographic Details
Published inAerospace Vol. 11; no. 4; p. 288
Main Authors Shi, Xiazheng, Yu, Anyuan, Nie, Hong, Zhang, Ming, Gui, Xiwen, Yang, Shaofei, Zheng, Yuting, Liu, Tianxing
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.04.2024
Subjects
Air springs
Aircraft
Airplanes
Angular velocity
Buffers
Damping
Design
Design and construction
design of experiments
Dynamic models
dynamic performance of the landing gear
frame-type landing gear
Landing gear
Load
Methods
Parameters
pitch stabilizing buffer
Pneumatics
Simulation
Taxiing
Vibration
Vibration control
Wheelsets
China
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Summary:During the landing and taxiing process of aircraft, the frame-type landing gear (FTLG) usually generates large pitch vibrations under external excitation. Excessive vibration increases localized loads on the landing gear, which may lead to localized failure of the structure. To minimize this undesirable vibration, a passive oil–pneumatic pitch-stabilizing buffer (PSB) is designed in this paper to provide pitch damping. This paper applies the basic principles of dynamics to establish a dynamic model of FTLG considering the influence of PSB. And based on the design of experiments (DOE) method, by changing the filling parameters and structural parameters of PSB, the results of the changes of the frame vibration angle, angular velocity, and landing gear load are obtained, so as to analyze the effects of different parameters on the dynamic performance of the landing gear in the landing and taxiing process. The results demonstrate that increasing the oil damping coefficient of PSB and decreasing the installation angle of PSB on the main strut during the landing period resulted in less frame vibration and lower wheelset load ratios, but increased the landing overloads of landing gears. In the taxiing phase, increasing the PSB air spring stiffness can effectively reduce the frame vibration caused by the uneven road surface. The PSB structural parameters have little effect on the dynamic performance of FTLG.
ISSN:2226-4310
2226-4310
DOI:10.3390/aerospace11040288