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本文针对带单轴稳定的惯性导航系统提出了使平台在对准过程中围绕相应轴转动一定角度用以实现双位置对准的两种原理方案。文中对这两种方案分别进行了研究,所得的结论是:在技术上两种方案都是可行的。转一定角度的双位置对准法是提高初始对准精度的有效措施。在忽略惯性器件标定系数误差的条件下,对于加速度计零位偏置为1×10~(-4)g 的系统,有可能把平台漂移测定和补偿到仅限于陀螺随机漂移的程度;只要无特殊要求,使用沿俯仰轴转动一定角度的结构方案比较有利,因为这种方案在结构上比转动方位角易于实现,而且姿态角的计算误差也比较小。
In this paper, we propose two principle schemes for the inertial navigation system with one-axis stability to make the platform rotate at a certain angle about the corresponding axis during alignment to achieve dual-position alignment. In this paper, the two programs were studied separately, the conclusion is: both technically feasible programs. To a certain angle of the dual alignment method is to improve the accuracy of the initial alignment of the effective measures. Ignoring the error of the calibration coefficient of the inertial device, it is possible to measure and compensate the platform drift to a degree limited to the random drift of the gyroscope only for systems with a zero offset of the accelerometer of 1 × 10 ~ (-4) g; Special requirements, the use of a certain angle along the pitch axis of the structure of the program is more favorable, because this program in the structure than the rotation azimuth easy to achieve, and the calculation of the attitude angle error is relatively small.