振动信号的全频带三参量测量

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。

Three Variable Measurement on Whole Frequency Band of Vibration Signal

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.