Research on Vibration Angle of Six Degree-of-Freedom

2012 ◽  
Vol 226-228 ◽  
pp. 440-443
Author(s):  
Chun Zhi Li ◽  
Ying Chen ◽  
Qing Lin Liu
Keyword(s):  
Measurement Accuracy ◽  
Fiber Optic ◽  
Rotation Angle ◽  
Angular Rate ◽  
Testing System ◽  
Fiber Optic Gyroscope ◽  
Practical Application ◽  
Accuracy Requirement ◽  
Testing Method ◽  
Six Degree Of Freedom

Based on fiber optic gyroscope technique new method of rotation angle testing in three-axis vibration is proposed in this paper, and the theory of fiber optic gyroscope is introduced as well. According to the measurement accuracy requirement, the angle testing system of FOG is designed by analyzing the environment of three-axis vibration. It was applied in experimental investigation of rotation angle in three-axis vibration with the FOG testing system and the real-time angular rate signal was processed by frequency analysis. The results of practical application show that it is feasibility and validity of angle testing method by means of FOG technique.

Research on Two-Position North-Seeking Method Based on the Single Axis FOG

2011 ◽  
Vol 301-303 ◽  
pp. 1489-1494 ◽  
Author(s):  
Deng Hua Li ◽  
Feng Zhou ◽  
Xi Bao Wu
Keyword(s):  
Fiber Optic ◽  
Angular Rate ◽  
Fiber Optic Gyroscope ◽  
Negative Pulse ◽  
The Third ◽  
The North ◽  
Specific Direction ◽  
Working Principle ◽  
Direction Information

The basic working principle and the two-position north-seeking method based on single-axis FOG(fiber optic gyroscope) is researched in this paper. Improved north-seeking method was proposed to solve the problem in the two-position FOG north-seeking scheme. To Sample in three positions of 0º, 90ºand 180ºseparately and obtain the measurement values of angular rate in these three positions. Then according to the measurement values of angular rate in the first and the third positions to calculate the north-seeking angle, and using the positive and negative pulse outputs of the FOG in the second position to obtain the specific direction information of carrier. So that, accomplish the north-seeking in the range of 0～360° for single-axis FOG. The experiment results showed that the accuracy of the improved two-position north-seeking program based on single-axis FOG is 0.101 (1σ) within 4 minutes.

scholarly journals A Novel Approach to Double the Sensitivity of Polarization Maintaining Interferometric Fiber Optic Gyroscope

Sensors ◽  
2020 ◽  
Vol 20 (13) ◽  
pp. 3762
Author(s):  
Dengwei Zhang ◽  
Cui Liang ◽  
Nan Li
Keyword(s):  
Fiber Optic ◽  
Signal To Noise Ratio ◽  
Angular Rate ◽  
Incident Light ◽  
The Novel ◽  
Fiber Optic Gyroscope ◽  
Technical Improvement ◽  
Novel Approach ◽  
Polarization Maintaining Fiber ◽  
Polarization Maintaining

In this paper, a novel optical approach to double the sensitivity to angular rate of interferometric fiber optic gyroscope (IFOG) is proposed. Two fiber polarization combiner/splitters (FPCSs), as the key components, are added in the traditional IFOG light path. The FPCSs are able to either combine two orthogonal polarizations transmitting at two different polarization-maintaining fibers (PMFs) into the two orthogonal axes of one PMF, respectively, or split two polarizations transmitting at the two orthogonal axes of one PMF into two polarizations to transmit at two different PMFs, respectively. Through the specific placement and coupling of these two FPCSs, the incident light can transmit twice along the polarization-maintaining fiber coil (PMFC). The novel approach is verified experimentally and the experimental results show consistency with the theoretical analysis. The proposed approach is able to double the sensitivity of IFOGs and can increase the signal-to-noise ratio (SNR) without increasing the length of PMFC, which is very susceptible to environmental influences and is of great significance in the technical improvement of IFOGs, as well as the miniaturization of IFOGs.

Study on the Error of Four-Position North Seeking System Based on the Single Axis Fiber Optic Gyroscope

2012 ◽  
Vol 503-504 ◽  
pp. 1158-1163 ◽  
Author(s):  
Ke Ke Duan ◽  
Deng Hua Li ◽  
Ren Zhong Pei
Keyword(s):  
Measurement Error ◽  
Fiber Optic ◽  
Influence Factor ◽  
Angle Measurement ◽  
Analysis Method ◽  
Fiber Optic Gyroscope ◽  
Error Sources ◽  
Accuracy Requirement ◽  
The North ◽  
Simulation Results

The method to analysis the influence of error sources on the fiber optic gyroscope north seeker is presented in this paper. The influence of various error sources of the north seeker are investigated comprehensively. The simulation results indicate that the precision of gyroscope is the most important influence factor; the influence of the position rotation error and mounting error are greater than that of the inclination angle measurement error. Based on the analysis, the advisable scheme to improve the accuracy of the four-position north seeker is proposed. The experimental results met the accuracy requirement well, which proved that the compensation and error analysis method in this paper are effective and feasible.

scholarly journals Multiple Optical Compensation in Interferometric Fiber-Optic Gyroscope for Polarization Nonreciprocal Error Suppression

2014 ◽  
Vol 6 (5) ◽  
pp. 1-8
Author(s):  
Ping Lu ◽  
Zinan Wang ◽  
Yi Yang ◽  
Duyu Zhao ◽  
Siyadong Xiong ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Gyroscope ◽  
Error Suppression
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