Analysis of Taxiing Performance of Single Strut Landing Gear Based on ISD
Keywords:inerter, ISDLG, taxiing, parameter optimization, simulation
In this paper, based on the “spring-damper” landing gear (SDLG), the inerter is introduced to form the “inerter-spring-damper” landing gear (ISDLG), and the taxiing dynamic models of both are established. Taking fuselage acceleration, buffer stroke and dynamic tire load as performance indexes, the parameters of ISDLG are optimized by using multi-objective genetic optimization algorithm. In MATLAB/Simulink environment, SDLG and ISDLG are simulated in time-domain and frequency-domain. The results show that compared with SDLG, the values of performance indexes of ISDLG are all reduced, especially at low frequency, which can effectively suppress the low frequency vibration of the fuselage and improve the ride comfort and handling stability of the aircraft when it is taxiing on the ground. In addition, through comparison, it is found that speed and road grade have different influences on aircraft taxiing performance, and road grade has the greatest influence, followed by speed.