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자동차 실내 소음저감을 위한 다채널 능동소음 제어에 관한 연구 II : 모의 실험
김흥섭,이태연,신준,오재응,Kim, H.S.,Lee, T.Y.,Shin, J.,Oh, J.E. 한국자동차공학회 1994 한국 자동차공학회논문집 Vol.2 No.6
Active noise control of random noise which propatate in the vehicle cabin as a form of spherical wave is the target of this study. In the previous study, the adaptive algorithm for adaptive controller is presented for the application in active noise control system. And for the preliminary study of adaptive active noise control in vehicle cabin as a real system, a computer simulation is performed on the effectiveness of the adaptive algorithm in the amplitude of the pressure fluctuation. This work studies the implementation of multi-channel feedforward adaptive algorithm for the reduction of the noise inside a vehicle cabin using a number of secondary sources derived by adaptive filtering of reference noise source. Multi-channel adaptive feedforward algorithm are verified in numerical simulation and semi-experimental justification of developed system is made on a domestic passenger car. In the results of semi-experimental study, the noise of specific region in the interior of automobile are reduced for the appreciabe sound pressure level in the operating engine rpm and finally this study suggests the capabilities of the real time active noise control in 3 dimensional acoustic fields.
김흥섭(H.S.Kim),이태연(T.Y.Lee),시준(J.Shin),조성오(O.S.Jo),방승현(S.H.Bang),장경영(K.Y.Jang),오재응(J.E.Oh) 한국자동차공학회 1992 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1992 No.11
With the advance of the starrlard of living, the demand on automobile reqires beyond the traffic device, therefore the interior noise has been the important factor for improvement of ride quality. The frequency components in the vehicle cabin on driving are effeted by the frequency of running engine. Specially, in low frequency ranges(20-200Hz), rooming noise of structual coupling noise is generated by the coupling of vibration of driving system and acoustical mode of interior. In this study, multichannel adaptive algorithm was realized and the noise of specific region in the interior of automobile was intended to be reduced through the control of engine noise in the vehicle cabine using developed algorithm.