摘要: |
棱镜安装误差角稳定性是惯性测量单元(IMU)的重要指标,关系着导弹初始发射方位精度,确保该指标满足要求具有重要意义。本文通过对影响IMU棱镜安装误差角稳定性的装配及测量过程分析,确定了装配过程中影响直角棱镜棱脊形变的相关因素;分别对螺钉紧固力矩、紧固顺序、固胶面积等关键因素进行了量化研究,总结出一种可提高棱镜安装误差角稳定性的工艺方法。经筛选试验及应用验证,棱镜稳定性合格率由36.8%提高至90.4%,此方法具有一定的推广应用价值。 |
关键词: 惯性测量单元;直角棱镜;稳定性;紧固力矩 |
基金项目: |
|
Research on the Process Method of Improving the Prism Misalignment Stability of IMU |
Yan Hang1, Zhang Lu1, Wang Qisheng2, Yan Jinru1
|
1. Xi’an Aerospace Precision Mechatronics Institute, Xi’an 710100;2. China Academy of Aerospace Electronics Technology, Beijing 100094
|
Abstract: |
The prism misalignment stability is important indexes of IMU, which determines the azimuth accuracy of the initial launch of the missile, and it is of great significance to ensure that the indicators meet the requirements. The paper analyses the whole process of assembling and measuring the prism misalignment stability of IMU, and the relevant factors affecting the deformation of the prism ridge are analysed and quantized. The relevant factors include screw tightening torque, tightening sequence and solid adhesive area. The optimized method of prism components is summarized, and it has been proved that the method can improve the prism misalignment stability of IMU. The test results show that the pass rate of the prism misalignment stability of strapdown IMU increases from 36.8% to 90.4%, while this process has the value and popularization of application. |
Key words: IMU;rectangular prism;stability;tightening torque |