Research on Sensitivity and Resolution of Superfluid Gyroscope

doi:10.3969/j.issn.1000-1093.2020.07.025

Abstract

Abstract: Sensitivity and resolution are the important performance indexes of novel high accuracy superfluid gyroscope. Based on the operating principle of superfluid gyroscope, the relation between sensitivity and working curve is researched, the diaphragm vibration amplitude of displacement detecting system is analyzed, the equation of detecting element noise is deduced, and a mathematic model of resolution is established. Then the phase fluctuation of superfluid which is caused by thermal energy is researched, the equation of thermal noise is deduced, and a mathematic model of limiting resolution is established. Research results show that the resolution of superfluid gyroscope is determined by detecting element noise, and its limiting resolution is determined by thermal noise. The sensitivity and resolution of gyroscope change periodically, and its limiting resolution is constant. A phase shift control system is used to lock the working point of gyroscope at a position where there is the highest sensitivity, the resolution of gyroscope is 10^-8 (rad·s^-1）/Hz and its limiting resolution is 10^-9 (rad·s^-1）/Hz. Key

Key words: gyroscope, superfluid, sensitivity, resolution, thermalnoise

CLC Number:

U666.12⁺3

ZHENG Rui, LI Fangdong, ZHAO Chuanchao. Research on Sensitivity and Resolution of Superfluid Gyroscope[J]. Acta Armamentarii, 2020, 41(7): 1457-1463.

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第41卷第7期2020 年7月兵工学报ACTA
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