一种基于自激励的核磁共振陀螺仪闭环控制方法  

A closed-loop control method for nuclear magnetic resonance gyroscope based on self-excitation

作　　者：岳亚洲[1,2] 明泽额尔顿 雷兴 张昊[1,2] YUE Yazhou;MINGZE Erdun;LEI Xing;ZHANG Hao(Flight Autimatic Control Research Institute,Xi’an 710065,China;Key Laboratory of Aeronautical Inertial Technology,Xi’an 710065,China)

机构地区：[1]西安飞行自动控制研究所,西安710065 [2]航空惯性技术重点实验室,西安710065

出　　处：《中国惯性技术学报》2022年第5期638-643,共6页Journal of Chinese Inertial Technology

基　　金：装备预研重点项目(41417010801)。

摘　　要：维持气室内原子稳定进动的磁场闭环控制是核磁共振陀螺仪的关键控制技术之一。在目前广泛应用的闭环控制方法中,相位闭环无法实时补偿,且存在由于晶振时钟频率受限造成的量化噪声,导致陀螺零偏稳定性较差且转速分辨率较低,限制了核磁共振陀螺的应用范围。为解决以上问题,提出了一种基于自激励的闭环控制方法,通过理论仿真模型和实验设计,验证了其正确性与可行性。仿真结果表明,采用所提出闭环控制方法的陀螺漂移可达到9×10^(-4)°/h,角速率分辨率可达到0.1°/s以内。实验结果表明,与传统方法相比,采用所提出的方法使得陀螺漂移精度提高了一个数量级,同时,为未来核磁共振陀螺小型化奠定了基础。The closed-loop control of the magnetic field to keep the atoms precession stable in the vapor cell is a critical control technology in nuclear magnetic resonance gyroscope.Among the closed-loop control methods widely used at present,the real-time compensation cannot be implemented in the phase closed loop,as well as the quantization noise caused by the limited clock frequence of the crystal oscillator,which results in poor bias stability and low angular rate resolution.The application range of NMR gyros is limited.To solve the problems above,a closed-loop control method based on self-excitation is proposed,and its correctness and feasibility are verified by theoretical simulation model and experimental design.The simulation results show that the gyro with the proposed method has a drift of 9×10^(-4)°/h and an angular rate resolution better than 0.1°/s.The experimental results show that,compared with the traditional method,the proposed method improves the gyro drift accuracy by an order of magnitude,and lays a foundation for the miniaturization of NMR gyro in the future.

关 键 词：核磁共振陀螺仪 自激励闭环控制 实时补偿 角速率分辨率 陀螺漂移 

分 类 号：U666.[交通运输工程—船舶及航道工程]