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가속도계 위치 변경에 따른 현가장치 TPA 개선에 대한 연구
강연준(YeonJune Kang),김준구(Jun-gu Kim),민동우(Dong-woo Min),송현진(David P. Song),이강덕(Kang-duk Ih) 한국소음진동공학회 2016 한국소음진동공학회 학술대회논문집 Vol.2016 No.4
This study is about how to improve accuracy when Transfer Path Analysis (TPA) is applied to a multi-link vehicle suspension. TPA is generally employed to estimate road noise and NVH of a vehicle suspension. In this case, however, TPA has some spatial constraints on suspension system. To put it another way, there is no room for sensor attachment and excitation because of its compact structure. Therefore, the inaccurate setting of the sensor and excitation, which is potentially problematic, could not acquire high reliability on Frequency Response Function (FRF) with accuracy and consistence. To deal with the obstacles, the experiment was conducted by locating an accelerometer between linkages or arms and bushes, which connect them to a sub-frame, on the way of energy transfer from road vibration. Also, using TPA with the data on acceleration from the placement of accelerometer to the target at the mounting point of the sub-frame, this study compares the result of this new approach with that of the existing TPA and identifies its efficiency.