振动信号的全频带三参量测量

摘要

Objective To solve problems in whole frequency band measurement of vibration signal from three variables:acceleration,velocity and displacement.Methods This paper presented a method to generate displacement,velocity and acceleration signal of whole frequency band from displacement signal and acceleration signal.Displacement signal was derived and filtered by low-pass filter.Acceleration signal was integrated and filtered by high-pass filter.Then the displacement,velocity,acceleration signal of the whole frequency band was obtained by integrating the two results.Derivative,integrator,filter were all described in Z transfer function.Results S Displacement,velocity,acceleration signal generated in both sinusoidal vibration and random vibration were quite consistent with exact displacement,velocity,acceleration signal.Conclusion The presented method can generate real-timely displacement,velocity,acceleration signal from displacement signal and acceleration signal.%目的 解决振动信号的加速度、速度、位移三参量全频带测量问题.方法 提出一种由振动加速度信号、位移信号生成全频带位移、速度、加速度信号的方法,对实测位移信号微分并低通滤波,对实测加速度信号积分并高通滤波,然后两者相加,得到全频段的加速度、速度、位移信号,所用的微分、积分、滤波都是用离散传函表示.结果 不论是正弦振动还是随机振动,生成的位移、速度、加速度信号与正确的位移、速度、加速度信号一致.结论 该方法可以由实测位移信号、加速度信号实时生成全频带三参量信号.