金属壳谐振陀螺误差补偿方法研究

针对金属壳谐振陀螺的误差建模与补偿方法进行研究.首先,通过分析金属壳谐振陀螺的敏感机理,找到影响陀螺性能的误差源,建立金属壳谐振陀螺的误差模型.然后,研究陀螺的误差传播特性,对误差源进行分类,提出金属壳谐振陀螺的误差补偿方法.最后,利用试验方法对建立的误差模型和补偿方法进行验证.试验结果表明:经过补偿后的金属壳谐振陀螺在工作温度范围内(-45℃ ～55℃)零偏不稳定性降低至4.67(°)/h,全温度段线性度由0.2％降低至0.03％,随机游走为0.6982(°)/h1/2,陀螺的综合性能得到显著提升,证明了误差模型和补偿方法的有效性.

Research on Error Compensation of Metal Shell Vibratory Gyro

The method of error modeling and compensation for metal shell vibratory gyro is studied.Firstly,by analyzing the sensitive mechanism of metal shell vibratory gyro,the error source that affects the performance of gyro is found,and the error model of metal shell vibratory gyro is established.Secondly,the error propagation characteristic of gyro is studied,and the error source is classified.The error compensation method of metal shell vibratory gyro is put forward.Finally,using the test method to verify the error model and compensation method,experimental results show that after the metal shell vibratory gyro compensated in the working temperature range (-45℃ ～ 55 ℃) bias instability is reduced to 4.67(°)/h,the entire temperature linearity is reduced from 0.2％ down to 0.03％,random walk 0.6982(°)/h1/2,the comprehensive performance of the gyro has been significantly improved,proves the validity of the error model and compensation method.