Interferometric Low-Frequency Calibration of Translation and Rotation Quantity Transducers

Abstract

INTRODUCTION In the past ten years. novel air-borne vibration exciters and interferometric measuring facilities have been developed allowing the accurate dynamic calibration of accelerometers. velocimeters and displacement transducers to be performedl-l. Since 1990, standard methods for the excitation and measurement of angular accelerations, angular velocities and rotational angles with specific time dependences have been developed at the Physikalisch-Technische Bundesanstalt (PTB). The facilities available in the PTB's "Acceleration" laboratory in Berlin for the calibration of translational and rotational quantity transducers are based on a universal concept for both the generation and measurement of the motion quantities. This concept and its application, especially for the low-frequency calibration of transducers. are presented in this paper.