Research on dynamic performance evaluation of fiber optic gyroscope based on laser Doppler measurement technology

2021 ◽  
Author(s):  
Shuai Zhao ◽  
Yilan Zhou ◽  
Xiaowu Shu
Keyword(s):  
Performance Evaluation ◽  
Fiber Optic ◽  
Dynamic Performance ◽  
Laser Doppler ◽  
Measurement Technology ◽  
Fiber Optic Gyroscope ◽  
Doppler Measurement

A New Dynamic Test Method of Fiber Optic Gyroscope

2012 ◽  
Vol 157-158 ◽  
pp. 245-249 ◽  
Author(s):  
Xu You Li ◽  
Na Zhang
Keyword(s):  
Input Signal ◽  
Fiber Optic ◽  
Dynamic Error ◽  
Dynamic Performance ◽  
Dynamic Test ◽  
Sine Wave ◽  
Test Method ◽  
Working Environment ◽  
Fiber Optic Gyroscope ◽  
Sway Motion

The sway motion of ships follows sine law. Therefore, it needs high dynamic performance of fiber optic gyroscope (FOG) to meet the serious working environment. A new test method was introduced to make reasonable assessment on the dynamic performance of FOG. The principle of this new test method was that the sine wave provided by the IP core in FPGA was superimposed on the digital ladder to simulate the input signal of sway motion. It could be proved that the serial of sine signal, which was generated by this method, was equivalent to the external input signal. Moreover, the dynamic error model of FOG was established to provide the theory of dynamic test. The results of dynamic test of FOG indicated that the dynamic error did not have divergent trends, the system parameters set was reasonable and the FOG system was stable. It also can be seen that dynamic error of FOG was increased with the increasing of sine wave amplitude, which was accord with the actual situation. The new dynamic test method of FOG was verified.

The Fiber Measuring Method for Rotating Parts Comprehensive Vibration

2012 ◽  
Vol 201-202 ◽  
pp. 87-90
Author(s):  
Ping Xiong ◽  
Deng Feng Zhao ◽  
Guo Ying Zeng ◽  
Juan Huang
Keyword(s):  
Optical Fiber ◽  
Torsional Vibration ◽  
Measuring Method ◽  
Laser Doppler ◽  
Vibration Measurement ◽  
Measurement Technology ◽  
Doppler Measurement ◽  
Rotating Shaft ◽  
Fiber System ◽  
Bending Vibration

Light propagation in the air is easily affected by the environment. Shaft bending vibration and torsional vibration are needed to be measured at the same time. The different vibration state are coupled each other. For these reasons, it is necessary to design the optical fiber laser Doppler measurement system and develop the integrated optical fiber system, which is in favor of various vibration modes decoupling and can improve the signal-to-noise ratio. The double parallel beam differential scheme is adopted in the torsional vibration measurement, which the light exposed in the air is coupled into the optical fiber. The optical fiber heterodyne Doppler interference measuring method is adopted in the bending vibration measurement. The laser Doppler vibration measurement technology is applied to a rotating shaft vibration measurement. Comprehensive measuring technology is developed, which can simultaneously measure bending vibration, torsional vibration and the rotation speed of shaft.

scholarly journals Analysis and Optimization of Dynamic Measurement Precision of Fiber Optic Gyroscope

2013 ◽  
Vol 2013 ◽  
pp. 1-9
Author(s):  
Hui Li ◽  
Liyang Cui ◽  
Zhili Lin ◽  
Chunxi Zhang
Keyword(s):  
High Precision ◽  
Control Algorithm ◽  
Closed Loop ◽  
Fiber Optic ◽  
Dynamic Performance ◽  
Dynamic Measurement ◽  
Measurement Precision ◽  
Fiber Optic Gyroscope ◽  
Detection Circuit ◽  
High Dynamic

In order to improve the dynamic performance of high precision interferometer fiber optic gyroscope (IFOG), the influencing factors of the fast response characteristics are analyzed based on a proposed assistant design setup, and a high dynamic detection method is proposed to suppress the adverse effects of the key influencing factors. The assistant design platform is built by using the virtual instrument technology for IFOG, which can monitor the closed-loop state variables in real time for analyzing the influence of both the optical components and detection circuit on the dynamic performance of IFOG. The analysis results indicate that nonlinearity of optical Sagnac effect, optical parameter uncertainty, dynamic characteristics of internal modules and time delay of signal detection circuit are the major causes of dynamic performance deterioration, which can induce potential system instability in practical control systems. By taking all these factors into consideration, we design a robust control algorithm to realize the high dynamic closed-loop detection of IFOG. Finally, experiments show that the improved 0.01 deg/h high precision IFOG with the proposed control algorithm can achieve fast tracking and good dynamic measurement precision.

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