振动测试系统中随机噪声的数字信号处理

Digital Signal Processing for Stochastic Niose in Vibration System

采用FIR(FiniteImpulseResponse)数字滤波原理设计了通带范围 0～ 1 0Hz的数字滤波器 ,有效地实现了对振动测试系统中随机干扰噪声的滤除。滤波后的信号曲线 ,可精确导出不平衡量的幅度和相位。整个过程分为信号采集。

This paper introduces the design of an FIR (Finite Impulse Response) low pass digital filter with passing band of 0～10 Hz, which rejects the noise of vibration test system.The amplitude and phase of the system unbalanced signal could be easily defined after signal processing by the digital filter. This whole course is comprised of three parts, which are data acquisition, filter algorithm implyment and signal restoration.