능동제어기법을 이용한 자동차의 급가속 흡기소음 저감을 위한 Moving Bandpass Filter의 개발

다국어 초록 (Multilingual Abstract)

The method of induction noise reduction can be classified by using passive control or active control method. However, the passive control method has a demerit to reduce the effect of noise reduction to low frequency (below) 500Hz) range and to be limited in a space of the engine room. Whereas, the active control method can overcome the demerit of passive control method. The algorithm of active control is mostly used in LMS (Least-Mean-Square) algorithm because it can obtain the complex transfer function easily in real-time. Especially, Filtered-X LMS (FXLMS) algorithm is applied to an ANC system. However, the convergence performance of LMS algorithm could not match if the FXLMS algorithm is applied to an active control of the induction noise under rapidly accelerated driving conditions. So, in order to solve the problem in this study, the Moving Bandpass Filter(MBPF) was proposed and implemented. The ANC using MBPF for the reduction of the induction noise shows that more noise reduction as 4㏈ than without MBPF.

참고문헌 (Reference)

1 "The Study on the Multi-Channel Active NoiseControl for Noise Reduction of the VechileCabin 1" 14 (14): 1992.

2 "The Performance Improvement for an ActiveNoise Control of Automotive Intake SystemUnder Rapidly Accelerated Condition" 11 (11): 2003.

3 "Noise Control ofan Air Intake System For a Four-CylinderEngine" 77-83, 1996.

4 "New Approach toLow-Noise Air Intake System Development" 911042 : 1991.

5 "Multiple ReferenceFeedward Active Noise Control Part1: Analysisand Simulation of Behavior" 233 (233): 745-759, 2000.

6 "ActiveNoise Control with the Active Muffler inAutomotive Exhaust Systems" 41 (41): 178-183, 1997.

7 "Active NoiseControl Systems Algorithms and DSP Implementations" John Wiley & Sons 1996.

8 "Active Control of AutomotiveAir Induction Noise via Source Coupling" 2001.