Research and application of active noise control system in vehicle

With the improvement of living standard, riding comfort has become an important indicator of choosing a car, but the noise in the car is the key factor affecting the ride comfort. The traditional passive noise reduction technology has a good inhibitory effect on high frequency noise, but the effect of low frequency noise is not ideal, and the active noise control system solves this problem well. This article first analyzes the characteristics and components of automobile noise, this paper introduces the principle of active noise control system, introduces the structure of the feed-forward and feedback structure and mixed structure of active noise control system structure characteristics and performance, and analyzes its feasibility for automobile noise suppression. The minimum mean square (LMS) algorithm and the filtering X minimum mean square (FX-LMS) algorithm are introduced. Based on DSP development platform, the identification algorithm of the secondary acoustic channel and the ANC control algorithm are completed in the one-dimensional sound field. The noise source includes narrowband noise and broadband noise. Set up a single channel in the test vehicle. The experiment results show that the system has certain control effect on the broadband noise.