STUDY THE POSSIBILITY OF CREATING A RESONANCE SHAKER TO REPRODUCE THE AMPLITUDE OF VIBRATION
ACCELERATION UP TO 100 000 m/s² 

Surovtsev Denis Aleksandrovich, engineer, Scientific-research Institute of physical measurements (8/10 Volodarskogo street, Penza, Russia); postgraduate student, Penza State University (40 Krasnaya street, Penza, Russia), E-mail: surovtsev-65@mail.ru 

620.178.5.05 

10.21685/2307-5538-2019-1-6 

Background. With the development of space engine building, more stringent requirements are imposed on the sensors of vibration and shock parameters. In connection with the nonequivalence of the effect of harmonic vibration and the energy impact on the shock
sensor, it is necessary to perform tests to determine the ultimate measurement ranges and mechanical strength of structures before operating. In order to obtain reliable test results, the actual task is the development of appropriate test equipment, and in particular, rod resonance shakes with piezoelectric excitation.
Materials and methods. A comparative analysis of the limiting capabilities of the standard vibration shakers of well-known foreign firms is carried out. The possibility of creating shaker stands based on a package of piezoelectric actuators is determined. The technique is based on a study of the possibilities of using the inverse piezoelectric effect to reproduce dynamic vibration acceleration.
Results. As a result of the conducted studies it is determined that the maximum amplitude of vibration acceleration reproduced by serially produced shaker stands with slotted resonance beams and other resonant structures can increase 10–20 times the maximum amplitude of vibration acceleration of the shaker, reaching 500–1400 g. A piezoactuator has been selected that ensures the reproduction of accelerations up to 100,000 m/s² and attachment to its moving part of the accelerometer without transient designs. The selection of an analog amplifier for controlling the operating modes of the piezocast is substantiated. 

shaker, piezoactuator, piezoelectric glass, natural frequency of the vibration amplifier, vibration displacement, vibration acceleration