Experimental investigation of directional force transmissibility and measurement accuracy in force-transducer-based dynamometer systems under random excitation

Abstract

This paper presents an experimental examination into the directional force transmissibility and measurement accuracy of a force-transducer-based dynamometer under random excitation. The primary goal is to determine how input and output forces are transmitted through the dynamometer structure in both longitudinal and transverse directions over a large frequency range. The experimental setup consisted of an octagonal-ring dynamometer equipped with five piezoelectric force transducers type 8230-003. Four sensors were attached on the dynamometer rings, with a fifth transducer placed along the string that connects the shaker and the dynamometer to receive input excitation. Random excitation signals were delivered within a frequency range of 0–1600 Hz, and the dynamic response was recorded in the frequency domain to compute the transmissibility coefficient.