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为了实现激光陀螺捷联惯测组合的高精度快速测试,分析了制约标定时间的诸多因素,改进了测试编排,提出了一种无定向条件下的快速标定技术。通过分析转台轴正角度误差、角位置控制误差对标定精度的影响,改进了速率标定方案,同时提出了一种六位置无定向快速标定方法。时序上充分利用了激光陀螺启动迅速、稳定快、线性度好的特点,在加速度计加温稳定过程中进行速率标定。此外,六位置无定向位置标定可用于全温度范围的快速标定,具有重要的工程应用价值。实际测试结果表明改进的标定方法准确度与传统的高精度标定方法相当,但测试时间由原来的4.5 h缩短到50 min,极大地提升了测试效率。
In order to achieve high precision and quick test of laser gyro strapdown inertial test combination, many factors that restrict the calibration time are analyzed, the test layout is improved, and a fast calibration technology under non-directional condition is proposed. Through analyzing the influence of positive angle error of turntable axis and error of angular position control on calibration accuracy, the rate calibration scheme is improved and a six-position non-directional calibration method is proposed. Timing make full use of the laser gyro start fast, stable and fast, good linearity, acceleration in the accelerometer temperature calibration process. In addition, the six-position non-directional position calibration can be used for rapid calibration of the entire temperature range, has important engineering value. The actual test results show that the accuracy of the improved calibration method is equivalent to the traditional high-precision calibration method, but the test time is shortened from 4.5 h to 50 min, which greatly improves the test efficiency.