Application of Least Squares-Support Vector Machine in system-level temperature compensation of ring laser gyroscope

详细信息    查看全文

• 作者：Guo  ; Wei^a ;   ; ^{nudtweiguo@163.com} ; Geng  ; Li^a ; Yan  ; Wu^b ; Xingwu  ; Long^a
• 关键词：Ring laser gyroscope ; Least Squares-Support Vector Machine ; Least-squares fitting ; Allan variance
• 刊名：Measurement
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：44
• 期：10
• 页码：1898-1903
• 全文大小：759 K

文摘

The bias of Ring Laser Gyroscope (RLG) exhibits a non-ignorable characteristic of drift when its temperature changes, which is an important factor of reducing the navigation precision in inertial navigation systems. The limitations of least-squares fitting and neural network are pointed out and a new scheme of system-level temperature compensation of RLG bias based on Least Squares-Support Vector Machine (LS-SVM) is proposed. Temperature experiment of RLG bias is designed and carried out to validate the effectiveness of the proposed method. The traditional modeling method of least-squares fitting is also investigated to provide a comparison with the LS-SVM based method. Allan variance is used to analyze the error terms of RLG before and after compensation. The results show that: the bias instability of RLG output after it has been compensated by LS-SVM model is 1.32 ¡Á 10^? ¡ã/h, which has decreased 8.57 ¡Á 10^? ¡ã/h from that before compensation. It indicates that this method has reduced the influence of temperature variation on the RLG bias effectively and improved the gyro¡¯s accuracy.