[논문]Monte Carlo Simulation of MR Damper Landing Gear Taxiing Mode under Nonstationary Random Excitation

Lee, Hyo-Sang; Jang, Dae-Sung; Hwang, Jai-Hyuk

doi:10.20910/jase.2020.14.4.10

Monte Carlo Simulation of MR Damper Landing Gear Taxiing Mode under Nonstationary Random Excitation 원문보기

항공우주시스템공학회지 = Journal of aerospace system engineering, v.14 no.4, 2020년, pp.10 - 17

Lee, Hyo-Sang (Dept. of Aerospace and Mechanical Engineering) , Jang, Dae-Sung (Dept of Aerospace and Mechanical Engineering, Korea Aerospace University) , Hwang, Jai-Hyuk (Dept of Aerospace and Mechanical Engineering, Korea Aerospace University)

Abstract ▼ AI-Helper

When an aircraft is taxiing, excitation force is applied according to the shape of the road surface. The sprung mass acceleration caused by the excitation of the road surface negatively affects the feeling of boarding. This paper addresses the verification process of the semi-active control method applied to improve the feeling of boarding. The Magneto-Rheological damper landing gear model is employed alongside the control method. It is a Oleo-Pneumatic damper filled with a fluid having the characteristics of increasing yield stress when subjected to a magnetic field. The control method involves verifying Skyhook Control Type2 developed by Skyhook control. The Sinozuka white noise model that considers runway characteristics was employed for the road surface in the simulation. The runway road surface obtained through this model has stochastic characteristics, so the dynamic characteristics were analyzed by applying Monte-Carlo simulation. A dynamic analysis was conducted by co-simulating the landing gear model made by RecurDyn and the control method designed by Simulink. Simulation results show that the Skyhook Control Type2 method has the best control effect in the low speed range compared to the passive type (without control) and skyhook control.

주제어

표/그림 (20)

그림 Fig. 1 MR Landing Gear
표 Table 1 Landing Gear Parameters
그림 Fig. 2 Friction Force
그림 Fig. 3 RecurDyn Model
그림 Fig. 4 Spectral densities of roads
그림 Fig. 5 Steady Random Profile
그림 Fig. 6 Displacement-Time Curve
그림 Fig. 7 Unsteady Random Profile
그림 Fig. 8 Skyhook Control Type2
그림 Fig. 9 Controller Flow Chart
그림 Fig. 10 First Simulation Results
표 Table 2 Optimum Control Gain Value (50 km/h)
표 Table 3 J_{RM S} of First Simulation
그림 Fig. 11 Control Damping Force
그림 Fig. 12 Force-Velocity of MR Damper
그림 Fig. 13 Matrix of the Monte-Carlo Simulation
표 Fig. 14 Variance at 5 s intervals
그림 Fig. 15 Result of 1000 Simulations
그림 Fig. 16 Variance of 1000 Simulations
표 Table 4 J_{RM S} of Monte-Carlo Simulations

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제안 방법

A study on vibration control of an active landing gear receiving random excitation has also been conducted [9]. For the study conditions, a statistical analysis was required since a random road surface has a different form for each road surface sample function, but this study did not employ a statistical method. The present study verifies the control characteristics and effects of t application of Skyhook Control Type 2 on the semi-active Magneto–Rheological (MR) damper landing gear, in comparison with the passive type (uncontrolled) and the existing Skyhook control gear.

데이터처리

A study analyzing the dynamic characteristics of aircraft landing gear on a non-stationary random road surface with actual runway characteristics was carried out in 1999 [8]. In this study, after modeling the aircraft landing gear as a nonlinear system, the characteristics of the landing gear were statistically identified through Monte-Carlo analysis. However, the landing gear model used in this study was analyzed only under the assumption of non-control as a passive landing gear with a pneumatic-hydraulic structure.

이론/모형

The white noise model suggested by Sinozuka was used to design the runway road surface, and the characteristics of the runway were taken into account. The sample runway surface obtained through this has a probabilistic property, and accordingly, Monte-Carlo simulation, which is a statistical analysis method, should be applied. The number of simulations and the number of sample functions were set to 1000, and this was determined by checking the statistical convergence of the simulation.
The present study verifies the control characteristics and effects of t application of Skyhook Control Type 2 on the semi-active Magneto–Rheological (MR) damper landing gear, in comparison with the passive type (uncontrolled) and the existing Skyhook control gear. To verify the control technique, Monte-Carlo simulation was applied.

참고문헌 (17)

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상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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상세보기
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원문보기 상세보기
C. Han, B. G. Kim, B. H. Kang, and S. B. Choi, "Effects of magnetic core parameters on landing stability and efficiency of magnetorheological damper-based landing gear system," Journal of Intelligent Material Systems and Structures, vol. 31, pp. 198-208, January 2020.

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