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Damping of compression and shear piezoelectric accelerometers by electromechanical feedback

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2 Author(s)
van Peppen, J.C.L. ; Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands ; Klaassen, K.B.

It is shown that the very pronounced resonance peak in the frequency entirely by a simple modification of existing accelerometers, providing them with an electrical sensor output as well as an electrical actuator input, and using a charge amplifier in a feedback path between the sensor output and the actuator input. Because a piezoelectric accelerometer is normally read out by a charge amplifier, no extra circuitry (expense) is necessary to provide this electromechanical feedback. It is shown that a maximally flat response (Butterworth) can be obtained with little peaking (approximately 2 dB) and excellent dynamic stability, which makes the acceleration usable up to its resonance frequency

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Instrumentation and Measurement, IEEE Transactions on  (Volume:37 ,  Issue: 4 )