High-frequency vibration: A new vibration testing technique based on piezo-actuators goes beyond the limitations of traditional analysis methods

摘要

A novel method for high-frequency (HF) mechanical excitation (>2-40kHz) of large (>100mm) and heavy (>100g) test specimens has been developed. The objective of this method is to excite the DUT or the test fixture onto which the DUT is directly mounted, using piezoelectric actuators. This new technique offers a considerable increase in performance with regard to the achievable frequency limit and vibration amplitude, as well as a reduction in the transverse vibration, at a lower cost than conventional methods. In addition to the calibration of vibration sensors in the HF range, environmental simulation of higher vibration frequencies (such as >5kHz) will become more critical in the future.