Performance analysis of multiple weak links fan shaped superfluid interference grating gyro
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摘要:
针对传统超流体干涉栅陀螺中梯度热相位的引入使得角速度信息被无用信息淹没而不易提取的突出问题，提出了一种无梯度热相位的多弱连接扇形超流体干涉栅陀螺结构，并对该陀螺的精度和灵敏度性能进行了深入的研究。首先在明晰了干涉栅结构中梯度热相位形成机理的基础上，设计了无梯度热相位且相邻干涉环路面积相等的新型干涉栅陀螺结构。其次建立了该陀螺的数学模型，验证了陀螺敏感角速度的过程。最后对该系统的角速度检测范围和灵敏度进行了深入分析，探究了敏感面积、薄膜面积、约瑟夫森频率、微孔数目和弱连接数对超流体干涉栅陀螺检测角速度的影响，通过仿真对比分析，验证了该结构陀螺的超高精度、超高灵敏度性能。
Abstract:Aimed at the outstanding issue of angular velocity extraction from useless information, which is caused by gradient hot phase of traditional interference grating gyro, a multiple weak links fan shaped superfluid interference grating gyro structure without gradient hot phase was proposed, and the accuracy and sensitivity performance of the gyro was intensively studied. First, on the basis of gradient hot phase mechanism, the equal adjacent interference loop area structure without gradient hot phase was designed. Second, the mathematical model of the gyro was established, and the sensitive process of angular velocity was verified. Finally, the performance of angular velocity detection range and sensitivity was analyzed: the impact of sensitive area, membrane area, Josephson frequency, and numbers of micropore and weak link on angular velocity range was explored. The ultrahigh-precision and ultrahigh-sensitivity of this structure are proved by comparing simulation results.
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图 6 无角速度输入时流量和薄膜位移曲线
Figure 6. Flow and film displacement curves without angular velocity input
图 7 输入恒定角速度10-6 rad/s后流量和薄膜位移曲线
Figure 7. Flow and film displacement curves when input angular velocity is 10-6 rad/s
图 8 不同Af时陀螺的检测角速度曲线
Figure 8. Gyro angular velocity detection curves with different Af
图 9 不同fJ时陀螺的检测角速度曲线
Figure 9. Gyro angular velocity detection curves with different fJ
图 10 不同N时陀螺的检测角速度曲线
Figure 10. Gyro angular velocity detection curves with different N
图 12 扇形超流体干涉栅陀螺灵敏度曲线
Figure 12. Fan shaped superfluid interference grating gyro sensitivity curve
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