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在时-频峰值滤波理论的基础上,提出了振动信号的噪声消减模型和误差控制方法,构建了信号估计误差与窗函数最大长度的关系。在许可估计误差为2%的情况下,对车辆实际线路动力学试验采集得到的振动信号进行噪声消减处理,结果表明,时-频峰值滤波能够很好地消减噪声,增强信号,是一种能有效消减振动信号中随机噪声的滤波方法。
Based on the time-frequency peak filtering theory, a noise reduction model and error control method of vibration signal are proposed, and the relationship between the signal estimation error and the maximum length of the window function is established. When the allowable estimation error is 2%, the noise reduction of the vibration signal collected by the actual vehicle line dynamics test is performed. The results show that the time-frequency peak filter can well reduce the noise and enhance the signal, Filtering method of effectively reducing random noise in vibration signal.