微半球陀螺交直流混合电压切换驱动方法研究  

Research on AC-DC mixed voltage switching driving method forμHRG

作　　者：张林 李荣冰[1] 徐菁 李忠良 Zhang Lin;Li Rongbing;Xu Jing;Li Zhongliang(Navigation Research Center,College of Automation,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京航空航天大学自动化学院导航研究中心,南京211106

出　　处：《电子测量技术》2024年第1期55-62,共8页Electronic Measurement Technology

基　　金：南京航空航天大学前瞻布局科研专项资金(1003ILA22033)项目资助。

摘　　要：微半球谐振陀螺的标度因数受阻尼不均匀程度和幅值控制精度影响,保证陀螺结构高度对称性的同时,驱动模态幅值控制精度也尤为重要。针对常见一倍频、1/2倍频电压驱动方式存在同频驱动噪声干扰和补偿相位延时导致微半球谐振陀螺驱动模态幅值控制精度较低,标度因数稳定性不足等问题,由于起振后陀螺等效驱动形式变化,基于微谐振子电压驱动原理构建了稳幅阶段微谐振子动态振动模型,提出了一种用于稳幅阶段的同相位二倍频电压驱动方式,设计了一种用于陀螺模态控制的交直流混合电压切换驱动方法,避免了相位补偿和同频驱动引起的幅值波动干扰。最后经力平衡模式仿真试验对比验证,混合电压切换驱动方法下驱动模态幅值控制精度提升5.882%,陀螺仪标度因数稳定性提高6.625%。The scale factor of micro hemispherical resonator gyroscope(μHRG)is affected by the degree of damping non-uniformity and amplitude control accuracy.While ensuring the high symmetry of the gyroscope structure,the accuracy of driving mode amplitude control is also particularly important.In response to the common problems of the same frequency driving noise interference and compensation phase delay in the common first harmonic and second harmonic voltage driving methods,such as low amplitude control accuracy of the driving mode ofμHRG and insufficient stability of the scale factor,due to the altered equivalent driving form of the gyroscope post-resonance,a novel approach is proposed based on the voltage driving principle of micro resonators.A dynamic vibration model for micro resonators during the stable amplitude stage is constructed.A same-phase double-frequency voltage driving method is introduced for this stage,alongside the design of a mixed AC-DC voltage switching driving method for gyroscope modal control.This method effectively mitigates amplitude fluctuation interference caused by phase compensation and same-frequency drive.Simulation experiments in force balance mode validate a 5.882%improvement in the control accuracy of modal amplitude and a 6.625%enhancement in the stability of the gyroscope scale factor under the mixed voltage switching driving method.

关 键 词：微型半球谐振陀螺 电压驱动 变频控制 简谐振动 谐振频率 

分 类 号：V241.5[航空宇航科学与技术—飞行器设计]