Location effect and adjustment scheme of the translation-tilt compensation bench for accelerometer performance investigation

Abstract

A low-frequency vibration insensitive accelerometer test pendulum bench based on translation-tilt compensation for testing a high precise accelerometer has been proposed in order to suppress the effect of seismic noise. However, the seismic noise suppression could be affected by the high-frequency coupling due to possible nonlinearities and the cross-coupling due to the off-axis location of the accelerometers on the bench. In this paper, based on the basic vibration insensitive design and actual application requirement, the location effect of the accelerometer on the bench is firstly modeled and analyzed, and then the adjustment schemes combined with the center of percussion concept to suppress these coupling effects are presented. Finally, the analytical result and the adjustment scheme are verified by an experimental demonstration.