급가속시 자동차 흡기소음의 능동소음제어

The method of the reduction of the induction noise can be classified by the method of passive control and the method of active control However, the passive control method has a demerit to reduce the effect of noise reduction at low frequency (below 500Hz) range and to be limited by 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 the LMS (Least-Mean-Square) algorithm because the LMS algorithm can easily obtain the complex transfer function in real-time. Especially, Filtered-X LMS (FXLMS) algorithm is applied to an ANC system However, the convergence performance of LMS algorithm goes bad when the FXLMS algorithm is applied to an active control of the induction noise under rapidly accelerated driving conditions. So, this study demonstrates the modified FXLMS algorithm and improves the control performance to reduce the automotive induction noise under the rapidly accelerated driving conditions.