摘要
磁效应误差是四频陀螺的一项重要误差源,而第二类色散平衡能从根源上减小磁敏感度。从近独立双陀螺模型出发,分析了第二类色散平衡的原理,设计了标定方案和更新算法,并搭建了实验系统。实验结果表明:采用稳光强技术有利于保证第二类色散平衡效果的稳定性。若结合200倍的磁屏蔽技术,第二类色散平衡标定后可使室温下四频陀螺的长期磁敏感度降低至0.0000975°/h/Gauss;温度从-40℃～60℃之间,磁敏感度变化约0.00645°/h/Gauss。实验验证了更新算法的可行性和所受的时间制约。
The magnetic effect error is an important error source of four frequency differential laser gyro（FFDLG）,the second kind of dispersion equalization technology（SKDET） can minimize the magnetic sensitivity of FFDLG essentially.From the independent dual-gyro approximation model,the principle of SKDET is analyzed,the calibration and updating algorithm is put forward,and the experimental system is set up.Experiment results show that： the light intensity technology is helpful to guarantee the effect of SKDET calibration.Associating the magnetic-shielding at 200 times,SKDET can decrease the magnetic sensitivity to 0.0000975°/h/Gauss under room temperature environment in long term and 0.00645°/h/Gauss under high-low temperature environment.The feasibility of updating algorithm and its time restriction are verified.
出处
《计算机与数字工程》
2013年第3期363-366,共4页
Computer & Digital Engineering
基金
国家863项目(编号:2006AA12Z302)资助
关键词
激光技术
四频差动激光陀螺
第二类色散平衡
磁敏感性
laser technology
four frequency differential laser gyro
the second kind of dispersion equalization
magnetic sensitivity
