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汽车的加速度是行驶过程中非常重要的参数之一。实测加速度时,受多种因素影响,会在测试信号中混入很多噪音,为了获取稳定的加速度信号,需对实测信号进行去噪处理。文中通过对几种基于阈值函数的小波去噪方法的比较,分别对仿真加速度信号和实测加速度信号进行去噪处理,并比较去噪效果,据此提出了进一步改进阈值函数的方向。
The acceleration of a car is one of the most important parameters in driving. When the measured acceleration is affected by many factors, a lot of noise will be mixed in the test signal. In order to obtain a stable acceleration signal, the measured signal needs to be denoised. In this paper, by comparing several wavelet denoising methods based on threshold function, the simulation acceleration signal and the measured acceleration signal are denoised respectively, and the denoising effect is compared. Therefore, the direction of further improving the threshold function is proposed.