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이태훈(Lee, Tae Hoon),안상도(Ahn, Sang Do),김유겸(Kim, Yu Kyeom) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.4
This paper presents an investigation into driveline clonk noise of midi-bus. Test was performed for operational acceleration and pressure, torsional vibration of driveline and FRF to TPA. Wavelet analysis was used to study spectral-time characteristics to all measurement data and specially for torsional vibration, lash analysis was carried out. To investigate the path of the clonk in detail, time domain TPA was introduced. With time domain TPA, the contribution of each path for the clonk was estimated by both subjectively and objectively. As a result, Transmission mount part was came to light as the main contributor of issued clonk. This was verified by reinforcing the bracket of transmission side. And 1D torsional nvh performance simulation model was built with measured torsional vibration. The simulation tool was used for prediction of some clonk behavior in tip in-out transient condition.
임동화(DongHwa Lim),이태훈(TaeHoon Lee),임승민(SengMin Lim),안상도(SangDo Ahn),이춘근(ChunGeun Lee) 한국자동차공학회 2015 한국자동차공학회 부문종합 학술대회 Vol.2015 No.5
A commercial semi-bonnet vehicle has a problem of low speed booming and vibration which is caused by rear suspension natural mode of differential nod and axle bending. This paper classifies the problem and suggests for countermeasure in view of source, transfer path and response.
이태훈(Lee, Tae Hoon),임동화(Lim, Dong Hwa),임승민(Lim, Seung Min),안상도(Ahn, Sang Do),이춘근(Lee, Chun geun) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.4
A commercial semi-bonnet vehicle has a vibration problem of driveline and rear suspension which are caused by rigid and natural mode of driveline and rear suspension. This paper classifies the problem and suggests for countermeasure in view of source, transfer path and response.
Step-time 개념과 전달경로분석법을 이용한 법규 소음 소음원 기여율분석 및 개발
김기성(Kisung Kim),이세진(Sejin Lee),강화익(Hwaik Kang),안상도(Sangdo Ahn),조영환(Younghwan Cho) 한국자동차공학회 2014 한국자동차공학회 학술대회 및 전시회 Vol.2014 No.11
In case of pass-by-noise test the distance between noise source and response is changing because the source and response are separated. Step-time concept is introduced to correct the time-varying acoustic transfer function for airborne noise transfer path analysis. In this study, contribution of noise source was pinpointed and noise reduction is confirmed by reduction source level.
Kalman Filter 알고리즘을 利用한 移動物體의 實時間 追跡
安相度,李聖哲 전북대학교 공업기술연구소 1994 工學硏究 Vol.25 No.-
In this paper, we proposed tracking of the moving object using the recursive Kalman Filter with appropriate initial condition. Recently, Kalman Filter algorithm has been much used as one of the techniques for the detection and tracking of the moving target. The target is assumed to be moving with constant velocity motion of two-dimensional space. We obtained estimation optimum steady state position, velocity based upon linearized system equation and measurement equation. The simulation results show the effectiveness of the Kalman Filter algorithm for tracking and estimated state value of filter.