Influence of thermal transfer on temperature drift compensation in nonplanar four-frequency differential laser gyros

Zhao Hongchang; Wang Zhiguo

doi:10.3788/IRLA201948.0905005

In order to reduce the temperature sensitivity of the zero drift in four-frequency differential laser gyro (FFDLG), the mathematical compensation model and the thermal design of the installation structure were studied. The relationship between zero drift and temperature of the FFDLG was studied by high and low temperature tests. In the first test, the FFDLG was fixed in the shielding box by an ordinary copper support. Due to the asymmetry of the temperature changes in the two discharge branches, the temperature change rate was a significant term of the mathematical compensation model. In the second test, a special copper support was designed to make the temperature in the two discharge branches change symmetrically, so the importance of temperature change rate in the mathematical compensation model was greatly reduced. After the support was improved, the root mean square (RMS) of residual bias after compensation decreased from 0.018 Hz to 0.01 Hz. Even if only a polynomial of temperature was used in the compensation model, an RMS of residual bias of 0.012 Hz could be achieved. The results show that:when designing FFDLG system, the thermal design of the installation structure can improve the compensation effect of the mathematical model. Temperature compensation is an effective method to improve the accuracy of the FFDLG. An FFDLG with an RMS of residual bias of 0.013 ()/h in the range of -40-60℃ was obtained after improvement in the installation structure and temperature compensation.

Influence of thermal transfer on temperature drift compensation in nonplanar four-frequency differential laser gyros

1. College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China

Received Date: 2019-05-11

Rev Recd Date: 2019-06-21

Publish Date: 2019-09-25

Key words:

four-frequency differential laser gyro /
zero drift /
temperature sensitivity /
temperature compensation /
thermal transfer

Abstract: In order to reduce the temperature sensitivity of the zero drift in four-frequency differential laser gyro (FFDLG), the mathematical compensation model and the thermal design of the installation structure were studied. The relationship between zero drift and temperature of the FFDLG was studied by high and low temperature tests. In the first test, the FFDLG was fixed in the shielding box by an ordinary copper support. Due to the asymmetry of the temperature changes in the two discharge branches, the temperature change rate was a significant term of the mathematical compensation model. In the second test, a special copper support was designed to make the temperature in the two discharge branches change symmetrically, so the importance of temperature change rate in the mathematical compensation model was greatly reduced. After the support was improved, the root mean square (RMS) of residual bias after compensation decreased from 0.018 Hz to 0.01 Hz. Even if only a polynomial of temperature was used in the compensation model, an RMS of residual bias of 0.012 Hz could be achieved. The results show that:when designing FFDLG system, the thermal design of the installation structure can improve the compensation effect of the mathematical model. Temperature compensation is an effective method to improve the accuracy of the FFDLG. An FFDLG with an RMS of residual bias of 0.013 ()/h in the range of -40-60℃ was obtained after improvement in the installation structure and temperature compensation.

HTML

Reference (13)

[1]	Dong Chunmei, Ren Shunqing, Chen Xijun, et al. Calibration method for the laser gyro strapdown inertial navigation system based on norm-observation[J]. Infrared and Laser Engineering, 2018, 47(9):0917007. (in Chinese)董春梅, 任顺清, 陈希军, 等. 激光陀螺捷联惯导系统的模观测标定方法[J]. 红外与激光工程, 2018, 47(9):0917007.
[2]	Yang Peigen, Gong Zhibing. Optical and Electrical Inertial Techniques[M]. Beijing:Weapon Industry Press, 1999. (in Chinese)杨培根, 龚志炳. 光电惯性技术[M]. 北京:兵器工业出版社, 1999.
[3]	Wang Zhiguo, Long Xingwu, Wang Fei. Overview of four-mode differential laser gyros[J]. Laser Optoelectronics Progress, 2012, 49(4):040005. (in Chinese)汪之国, 龙兴武, 王飞. 四频差动激光陀螺综述[J]. 激光与光电子学进展, 2012, 49(4):040005.
[4]	Fan Zhenfang, Lu Guangfeng, Zhang Bin, et al. Research on electrical characteristic of discharge tube in ring laser gyro[J]. Infrared and Laser Engineering, 2017, 46(6):0605002.
[5]	Han Zonghu, Li Jun, Chen Linfeng, et al. Periodically changed bias over temperature in four-frequency differential laser gyroscopes[J]. Journal of Chinese Inertial Technology, 2015, 23(1):115-119. (in Chinese)韩宗虎, 李俊, 陈林峰, 等. 非共面四频激光陀螺变温零偏周期性波动[J]. 中国惯性技术学报, 2015, 23(1):115-119.
[6]	Wang Fei, Wang Zhiguo, Long Xingwu. Cavity length sensitivity in four-mode differential laser gyro[J]. Infrared and Laser Engineering, 2012, 41(11):3097-3101. (in Chinese)王飞, 汪之国, 龙兴武. 四频差动激光陀螺腔长敏感性的研究[J]. 红外与激光工程, 2012, 41(11):3097-3101.
[7]	Ma Yanghua, Yu Wendong, Quan Bingxin, et al. Influence of path length control mirror on dynamic stability of ring laser gyro[J]. Chinese Journal of Lasers, 2017, 44(6):0601001. (in Chinese)马仰华, 于文东, 权冰心, 等. 腔长控制镜对激光陀螺动态特性的影响[J]. 中国激光, 2017, 44(6):0601001.
[8]	Wang Zhiguo, Long Xingwu, Wang Fei. Mode pulling effect and compensation for nonplanar four mode differential laser gyros[J]. Optics and Precision Engineering, 2011, 19(5):1061-1067. (in Chinese)汪之国, 龙兴武, 王飞. 异面腔四频陀螺中的模牵引效应及补偿技术[J]. 光学精密工程, 2011, 19(5):1061-1067.
[9]	Qian Weizhu, Yang Libao. A fiber optic gyro error compensation method based on wavelet neural network[J]. Chinese Optics, 2018, 11(6):1024-1031. (in Chinese)骞微著, 杨立保. 基于小波神经网络的光纤陀螺误差补偿方法[J]. 中国光学, 2018, 11(6):1024-1031.
[10]	Zhang Pengfei. Research on strapdown inertial navigation system with mechanically dithered ring laser gyroscope and its real-time temperature compensating approach[D]. Changsha:National University of Defense Technology, 2006. (in Chinese)张鹏飞. 二频机抖激光陀螺捷联惯导系统及其实时温度补偿方法的研究[D]. 长沙:国防科技大学, 2006.
[11]	Wang Huiwen. Partial Least-squares Regression-method and Applications[M]. Beijing:National Defense Industry Press, 1999:42-66. (in Chinese)王惠文. 偏最小二乘回归方法及其应用[M]. 北京:国防工业出版社, 1999:42-66.
[12]	Yang Shiming, Tao Wenquan. Heat Transfer[M]. Beijing:Higher Education Press, 2006:42-43. (in Chinese)杨世铭, 陶文铨. 传热学[M]. 北京:高等教育出版社, 2006:42-43.
[13]	Jiang Yanan. Ring Laser Gyro[M]. Beijing:Tsinghua University Press, 1985. (in Chinese)姜亚南. 环形激光陀螺[M]. 北京:清华大学出版社, 1985.

Influence of thermal transfer on temperature drift compensation in nonplanar four-frequency differential laser gyros

doi: 10.3788/IRLA201948.0905005

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Related

Proportional views