Wave Problems of the Influence of Acoustic Pressure on the Accuracy of Inertial Sensors

Abstract

This research is devoted to the study of the nature and degree of the influence of acoustic radiation, as well as the mechanical models of the disturbed movement, depend on the ratio between the dimensions of the product and half the length of the sound wave. The studied parameters of a double-shell structure with a rectangular hole in the conditions of irradiation with sound waves of different frequencies, namely: shell velocity, linear deformations and acoustic pressure, are important for predicting the behavior of the gyroscope shell and the possibility of resonant phenomena. It is established that high-intensity acoustic radiation causes measurement errors above the sensitivity threshold of the device. The largest values of systematic error reach the level of 0.6 deg s <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-1</sup> and are observed at a frequency of 800 Hz. To analyze the effect of diffraction phenomena on the suspension of the angular velocity sensor, computer simulations were performed in the Harmonic Acoustic analysis system. It is established that in the system at a frequency of 2200 Hz there is a resonance and the displacement of the suspension surface reaches 28.3 μm. The obtained results can be used at the stage of designing the elements of the navigation system to improve their performance designing the elements of the navigation system to improve their performance.