A Thermal Performance Analysis and Comparison of Fiber Coils with the D-CYL Winding and QAD Winding Methods.
The thermal performance under variable temperature conditions of fiber coils with double-cylinder (D-CYL) and quadrupolar (QAD) winding methods is comparatively analyzed. Simulation by the finite element method (FEM) is done to calculate the temperature distribution and the thermal-induced phase shift errors in the fiber coils. Simulation results reveal that D-CYL fiber coil itself has fragile performance when it experiences an axially asymmetrical temperature gradient. However, the axial fragility performance could be improved when the D-CYL coil meshes with a heat-off spool. Through further simulations we find that once the D-CYL coil is provided with an axially symmetrical temperature environment, the thermal performance of fiber coils with the D-CYL winding method is better than that with the QAD winding method under the same variable temperature conditions. This valuable discovery is verified by two experiments. The D-CYL winding method is thus promising to overcome the temperature fragility of interferometric fiber optic gyroscopes (IFOGs).
College of Automation, Harbin Engineering University, Harbin 150001, Heilongjiang, China. lixuyou@hrbeu.edu.cn.
Xuyou
X
Li
College of Automation, Harbin Engineering University, Harbin 150001, Heilongjiang, China. vvling@hrbeu.edu.cn.
Weiwei
W
Ling
College of Automation, Harbin Engineering University, Harbin 150001, Heilongjiang, China. hekunpeng@hrbeu.edu.cn.
Kunpeng
K
He
College of Automation, Harbin Engineering University, Harbin 150001, Heilongjiang, China. xzlsdlg@163.com.
Zhenlong
Z
Xu
College of Automation, Harbin Engineering University, Harbin 150001, Heilongjiang, China. dust_1028@163.com.
Shitong
S
Du
double-cylinder (D-CYL); fiber coil; finite element method (FEM); interferometric fiber optic gyroscope (IFOG); quadrupolar (QAD)