用于末敏弹稳态扫描参数测量的微惯性测量单元的误差标定

Error Calibration of Micro Inertial Measurement Unit for Stable Scanning Parameters of Sensor-fuzed Ammunition

对用于末敏弹稳态扫描阶段参数测量的微惯性测量单元提出了一种标定方法。由于末敏弹在稳态扫描阶段的运动特点,采用的陀螺的量程往往比较大,因此需要对其建立合适的误差模型。文中首先对微惯性测量单元中的陀螺和加速度计分别建立了适当的误差模型。之后,进行了转台速率实验和转台位置实验。应用线性拟合和最小二乘法对速率实验和位置实验的数据进行解算,得到了所建误差模型中的参数。最后将标定过的微惯性测量用于仿真投弹实验。实验结果表明文中采用的误差标定方法是合理的。

An error calibration method for the micro inertial measurement unit（MIMU）which is used for the measurement of stable scanning period parameters of sensor-fused ammunition was proposed in this paper.Due to the movement characteristics of sensor-fused ammunition during the stable scanning period,the measurement range of the gyro is larger,so a special model was built.In the first place,special models for both the gyro and accelerometer of the MIMU were built.Afterwards,the turntable rate experiment and the turntable place experiment were carried out.The linear fit method and least square method were used for solving the experiment data;the parameters of the error model were acquired.Finally,the calibrated MIMU was applied to the simulation bomb-drop experiment.The experiment results indicate that the mentioned error calibration method is rational.