一种可抑制航向运动影响的单轴转位方案

Design of single-axis rotation modulation scheme restraining influence of yaw motion

摘要:

分析了单轴旋转惯导系统误差调制原理和转位方案，针对传统转位方案会因为载体航向运动降低调制效果和现有航向隔离方案会严重减小转位机构寿命的问题，通过计算确定转位机构停止角度，从而极大程度消除惯性器件常值零偏对惯导系统的影响且没有增加转位机构运行频率，设计了能够有效抑制航向运动对调制效果影响的灵活单轴转位方案。仿真结果表明，灵活转位方案能够有效抑制载体航向运动对旋转调制效果的降低作用，具有理论研究和工程应用价值。

Abstract:

The error modulation principle and rotation scheme of the single-axis rotary strapdown inertial navigation system are analyzed. Aiming at the problems that yaw motion of carrier can decrease rotary modulation effect and the methods isolating yaw motion at present can cut lifetime of rotary mechanism, determine the stop angle of indexing mechanism with calculation to eliminate the effect of bias of inertial measurement unit for the most part, a flexible rotation scheme is proposed which can restrain the influence of yaw motion to rotary modulation effectively without increasing rotary mechanism running frequency. Theoretical analysis and simulation experiment show that the proposed rotation scheme can restrain the reduction effect of yaw motion to rotary modulation effectively, which has reference value for theoretical research and engineering application.