论文部分内容阅读
为了提高陀螺加速度计在线振动条件下的标定精度,提出了陀螺加速度计在线振动台上的进动整周期的测试方法。该方法将陀螺加速度计正倒置安装后,在静态和线振动状态下分别测量陀螺加速度计进动整周期中的相关时间数据,计算出陀螺加速度计进动整周期的平均角速率,通过平均角速率与陀螺加速度计模型输出间的积分关系,推导出了陀螺加速度计在线振动台上的标定误差模型,辨识出了加速度计的零偏、标度因子、二次项系数和三次项系数。该方法抑制了陀螺加速度计输出的平均角速率误差,能够提高陀螺加速度计在线振动台上测试的精度。最后进行了算法验证,验证了该方法能够准确的辨识出加速度计的各项误差模型系数,辨识精度达到10?7,提高了陀螺加速度计在线振动台上的标定精度。
In order to improve the calibration accuracy of the gyro accelerometer under the condition of on-line vibration, a test method of precession period of the gyro accelerometer on-line vibration table is proposed. After the gyro accelerometer is installed upside down, the relative time data of the gyro accelerometer into the whole period is measured under both static and linear vibration conditions, and the average angular velocity of the gyro accelerometer into the whole period is calculated. Through the average angle And the integral of gyro accelerometer model output, the calibration error model of gyro accelerometer on-line vibration table was deduced, and the zero bias, scale factor, quadratic coefficient and cubic coefficient of accelerometer were identified. The method suppresses the average angular rate error of the gyro accelerometer output and improves the accuracy of the gyro accelerometer on-line vibration stage. Finally, the algorithm is verified to verify that this method can accurately identify the error model coefficients of the accelerometer, and the identification accuracy reaches 10.7, which improves the calibration accuracy of the gyro accelerometer on-line vibration table.