摘要
基于光学陀螺的单轴旋转式捷联惯性通常采用角度传感器来实现方位角的输出,但其测量结果受角度传感器自身精度、回转轴系、橡胶减震器及防冲击减震器的影响较大。为提高姿态传递精度,提出一种基于自准直仪和多面镜的光学传递方案,通过光学方法将输出平面与惯组直接建立关系,从而减少中间环节,消除角度传感器误差对系统方位角输出带来的误差,可有效避免传统测量中各种因素的影响。通过模拟试验该方案三个姿态角的传递精度均可达到5″以内,满足惯性系统的高精度姿态传递需要。
In single-axis rotating INS with optical gyros, an angle sensor is usually used to realize the attitude＇s output. But the accuracy of this method is significantly influenced by angle sensor, rotary shaft, rubber absorber, and anti-shock absorber. To solve this problem, an attitude transferring scheme by using autocollimators and polygon mirrors is proposed. The relationship between output plane and IMU is directly established by an optical method, thereby reducing the intermediate steps and effectively avoiding the above influencing factors in traditional method. The simulation results show that the transfer accuracies of the three attitudes are all within 5＂, which satisfies the need of attitude transfer in high precision INS.
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2015年第2期275-280,共6页
Journal of Chinese Inertial Technology
基金
国防科技预研重点项目(A0320132002)
关键词
姿态传递
自准直仪
多面镜
折转光管
attitude transfer
autocollimator
polygon mirror
reflex tube
