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정의봉,김준엽,김현,Jeong, Weui-Bong,Kim, Jun-Yeop,Kim, Hyun 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.3
The least square estimation is used frequently in experimental modal analysis techinque to eliminate noise signals. However, identified modal parameters are sometimes inaccurate, since the least squre estimation is sensitive to noise. In this paper, a new total least squre estimation, which is robust to noise signals, is developed and applied to experimental modal analysis technique such as Prony method and Circle Fit method. Several simulated results show that the proposed method is robuster to noise than conventional method.
아이들링 진동응답 예측을 위한 엔진마운트의 실험적 설계변경
정의봉(Weui-Bong Jeong),조영희(Young-Hee Cho),김원영(Won-Young Kim),전범석(Beom-Seok Jeon) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.6_2
Experimental transfer function synethesis method is developed and applied to the engine-mount systems of construction vehicles. The frequency response functions of combined structure(engine+frame) are estimated from the experimental data of component structure. Transmitted forces through engine-mounts are estimated from idling responses by least square method. Idling responses of vehicle can be also predicted when the characteristics of engine-mounts are modified. The predicted results are compared with experimental data, and the results show the usefulness of the method.<br/>