低温超导核磁共振陀螺仪模型

Model of nuclear-magnetic resonance gyroscopes with cryogenic superconductor

建立了单工作物质的三自由度3He低温超导核磁共振陀螺仪结构;利用了量子力学和经典动力学,经过严密的力学分析和数学演算,给出了三轴陀螺仪的工作原理和结构示意图;针对陀螺仪的交叉轴角速率耦合问题,给出了附加磁场线圈解耦法和冗余设计结构,最后建立了基于超导量子干涉仪探测磁矩,并采用最小二乘估计法来推导陀螺进动频率。陀螺仪测速范围可以达到10-9～103 rad/s,漂移为10-4(°)/h。该陀螺仪结合低温超导技术具有高精度的前景。需要进一步对超导量子干涉磁矩检测仪的精度与陀螺性能进行研究。

This paper established a three-degrees of freedom ^3He gyroscope model with cryogenic superconducting nuclear-magnetic resonance structure. Quantum mechanism and kinematic rectification mechanism have been discussed, and the operating principle and construction of three-axis gyros have been given after mechanical analysis and strict math derivation. For the problem of gyroscopes cross-axis angular velocity coupling, it has been given the additional magnetic field coil decoupling and redundant design of the structure based on the final establishment of a superconducting quantum interference device to detect magnetic moment. Least-squares method was used to estimate derived gyroscope precession frequency. Present study shows that this gyroscope velocity range can be up 10^-9～ 10^3 rad/s, and its random drifting can be reduced to 10^-4 （°）/h. The gyroscope using low-temperature superconducting can be high precision in the future. It needs further research on the accuracy of superconducting quantum interference magnetic detector and the performance gyroscopes.