Research on the Impact of the Process Control of Random Vibration Testing by Piezoelectric Accelerometer Sensitivity
Based on the unique piezoelectricity of its internal structure,the piezoelectric acceleration sensor is capable of converting acceleration signals into corresponding changes in charge.Consequently,which is widely employed in the field of vibration test control and measurement.As an important part of real-time signal acquisition and feedback in vibration test control system,sensor sensitivity directly determines the accuracy of random vibration test control and measurement.In this paper,based on the test control system composed of the DC-6000-60 electrodynamic shaker and the American SignalStar DP-760 digital vibration controller,the research showed that the sensitivity setting deviation of the sensor in the charge amplifier during the test control process,the control spectrum curve fitted by the controller outwardly met the specified test conditions,but it has actually led to the over-test or under-test of aerospace products in the process of random vibration test.
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