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유압조향계 비선형 진동시스템에 대한 요인분석 및 영향도 평가
최성근(Sungkun Choi),이창노(Changro Lee),전귀남(Kwinam Jun),임철훈(Choulhoon Lim),이현주(Hyunjoo Lee),박광칠(Kwangchil Park),현상학(Sanghak Hyun) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
This paper presents a study on the rotational vibration sensitivity of automotive hydraulic power steering systems. In order to describe non-linear dynamic coupling effects between the steering rack-pinion gearbox and the hydraulic sub-system, we build two different models and co-simulate the mechanical system based on multi-body dynamics and the power system based on the hydraulics. The frequency responses of the steering wheel to the rack force are obtained to compare the experimental results. The agreement between simulation and experimental results shows the validity of the co-simulation model. The sensitivity analysis for the factors, such as rack friction, valve opening area, torsional stiffness and the inertia of the steering wheel are carried out by the design of experimental method. From the factor analysis results the effective methods to reduce the steering wheel vibration are proposed.
VPD 프로세스를 적용한 휠로더의 동역학 및 내구 해석
최성근(Sungkun Choi),박흥근(Heungkeun Park),장한기(Hankee Jang),명성식(Seongshik Myeong) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
This paper presents a dynamic and durability analysis of wheel loader using VPD process. In order to predict the dynamic behaviors of the wheel loader during the driving on the road with the bump, the analytical model of wheel loader was built up and the vehicle dynamic analysis was carried out using MSC.ADAMS/Car program. To Verifying the analysis results with experimental data, vertical acceleration of front axle and rear axle/frame were measured. Also, wheel loader was carried out fatigue analysis. From the analysis process, effective analysis method of wheel loader are proposed.