Engineering Vehicle Cabs Active Noise Control Strategies

With the development of society, there is growing focus on improving the quality of living environment, and the noise pollution, as an important environmental issue, has also been paid more attention. The most serious noise pollution on the mining area of mining enterprises usually is very heavy, because the workers and operator often face faces the roar of machinery. Therefore it works the effective control of vehicle noise very practical significance.As vehicle noise, whether in the car or out the car, the engine noise is the most important part of the whole sound pollution. Especially for construction vehicles, they are often not very effective to do the cockpit to deal with the noise. Therefore, this article will focus on engine noise to the cockpit to improve the noise attenuation.Based on the theory of adaptive filter, the active noise control technology (ANC) has developed a lot since last century, and this technology can effectively reduce the noise around the error sensor. At the same time, the development of the theory of ANC system can extend deeply the application area of ANC system by industry.The ANC, however, the traditional system of regional strict noise restrictions around the error sensors within a certain range, but in terms of drivers, it is difficult to be installed in fixed error sensors around the human ear. In this paper, the idea of the virtual location of noise control will be introduced, and combined with the second error filtering algorithm. This method can effectively reduce the noise level in a remote location by adjusting the gain coefficient and the virtual noise location, and according to actual requirement the amount of attenuation of noise in different frequency domain can be controlled.