环形激光陀螺仪机械抖动参数的选定  

Way to select dithering amplitude and frequency of RLG

作　　者：王可东[1] 顾启泰[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《光学技术》2000年第4期354-357,共4页Optical Technique

摘　　要：抖动参数的正确选择直接影响抖动偏频效果。为了有效地进行抖动偏频 ,抖动角速度幅度应远大于 RL G的闭锁阀值。当抖动角幅度增大至一定值后 ,再增大抖动角幅度对抖动偏频效果影响不大 ,而局部调整抖动角幅度却可能使动态锁区降为 0 ,实现完全解锁。同时抖动角幅度的对称性控制对减小由抖动而产生的偏置误差具有重要的意义。为了适应高速数字采集和处理 。Proper selection of dithering amplitude and frequency of RLG has a direct influence on the effect of dithering bias. In order to reduce lock in of RLG effectively, dithering rate amplitude should be many times (usually over 100 times) larger than the threshold value of lock in. However, when dithering rate amplitude is large enough, it is unnecessary to make it larger as far as the effect of reducing lock in is concerned. Dynamic lock in may be reduced to zero by modulating dithering amplitude locally with very small value. At the same time, the control of the symmetry of dithering amplitude is very important to reduce the bias due to dithering. In order to adapt to digital sampling and processing with high speed, dithering frequency should be increased as high as possible.

关 键 词：抖动偏频 误差补偿 环形激光陀螺仪 抖动参数 

分 类 号：O318[理学—一般力学与力学基础]