汽车加速过程噪声分析与控制

Noise Control and Analysis during Vehicle Accelerating Period

提出了基于变时基短时傅里叶变换来分析和处理时变信号的技术。运用该技术对某汽车的加速噪声进行测量和分析,发现发动机进气噪声是该车主要的加速噪声源。通过对该车进气系统的改进设计,使该车车外加速噪声达到了限值要求。

Measuring and analyzing technology based on variable-time-interval Fourier transform was dealt with for vehicle accelerating noise signal. Accelerating noise was measured and analyzed for a passenger car, the inlet air noise of its engine has been found to be the main noise source during the car accelerating period. The improving measures were put forward for its engine air inlet system, the result showed that the accelerating noise of the car could meet the demand of the accelerating noise limitation.