Engineering nonlinear vibration detecting method
A technology of nonlinear vibration and detection method, which is applied in the direction of vibration measurement in solids, measurement of vibration, and acceleration measurement using inertial force, etc. It can solve the problems that the embedded dimension and delay time cannot be verified, and the reliability of the phase space is not high. , to achieve the effect of being easy to promote and use, and strong operability
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[0019] The engineering non-linear vibration detection method of the present invention, according to the technical scheme implemented by it, further describe its method steps in detail below through the embodiment:
[0020] (1) The three-axis low-impedance piezoelectric accelerometer is attracted to the measured structure with a magnetic base, the accelerometer is connected to the signal processor through the coupler or connected to the A / D conversion board through the coupler, and then the signal is sent to the computer . Three-way (X, Y, Z) acceleration signals are collected (X, Y, and Z three-way signals are x(n), y(n), z(n) respectively).
[0021] (2) Use wavelet nonlinear threshold filtering to filter out the broadband background noise of the acceleration signal collected (x(n), y(n), z(n) after filtering are respectively ). The following takes the signal in the X direction as an example to illustrate the processing process:
[0022] (a) Select the appropriate wavelet ...
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