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Research on the Noises of Superfluid Matter Wave Interference Gyroscope

ZHAO Wei1, ZHENG Rui1,2, LIU Jianye1, XIE Zheng1   

  1. 1. Navigation Research Center, College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;
    2. College of Electrical Engineering and Information, Anhui University of Technology, Maanshan 243002, China
  • Received:2012-05-23 Revised:2012-11-28 Online:2013-04-25 Published:2013-04-23
  • Supported by:

    National Natural Science Foundation of China (61074162); Research Fund for the Doctoral Program of Higher Education of China (200802870011) *Corresponding author. Tel.: 025-84892304-804 E-mail: zhwac@nuaa.edu.cn

Abstract:

Gyroscope accuracy is closely related to its noise. To develop a novel superfluid matter wave interference gyroscope with high accuracy, its noise should be studied systematically. First, according to the generating mechanism of gyroscope noise, its origins are analyzed. The noise types are classified as thermal, locking value fluctuation, temperature fluctuation, frequency fluctuation and detecting element noise. Then, based on the mathematic model of each noise, the gyroscope noise is analyzed by utilizing some common parameters. The results show that thermal noise is relevant to the gyroscope structure parameter and working parameter, but is irrelevant to detected angular velocity. Locking fluctuation noise is only relevant to structure parameter; the other noises are all related to structure parameter, working parameter and detected angular velocity. Detecting element, frequency and locking value fluctuation noises are the primary factors that contribute to gyroscope output noise. In the range of the changing value of angular velocity, the gyroscope output noise changes nonlinearly with arange from the order of -7 to -6 in 1 Hz bandwidth.

Key words: superfluid, gyroscopes, matter wave, interference, noise

CLC Number: