Fast Compass Alignment Algorithm of FOG SINS under Sway Condition

2013 ◽  
Vol 321-324 ◽  
pp. 2171-2176 ◽  
Author(s):  
Bin Zhou ◽  
Wei Wang
Keyword(s):  
Fiber Optic ◽  
Alignment Algorithm ◽  
Test Results ◽  
Fiber Optic Gyro ◽  
Initial Alignment ◽  
Variable Parameters ◽  
Navigation Algorithm ◽  
Alignment Problem ◽  
Concrete Realization ◽  
Instrument Accuracy

Through research on initial alignment problem of fiber optic gyro SINS in the sway condition, this paper proposed a rapid compass alignment scheme with variable parameters, which can accomplish rapid initial alignment. Firstly, analysted SINS compass alignment principle, and gave a concrete realization method which has the same calculation procedure with full damping navigation algorithm. This method makes the alignment and navigation to use the same set of algorithms, and can effectively reduce algorithm complexity. Simulation and repeatedly sway test results show that the alignment algorithm is effective. The alignment precision and instrument accuracy is consistent, it can meet the requirements of the initial alignment.

Map Matching-Aided In-Motion SINS Initial Alignment

2012 ◽  
Vol 605-607 ◽  
pp. 1395-1401
Author(s):  
Gao Wei Zhang ◽  
Jia Bin Chen ◽  
Chun Lei Song ◽  
Ting Ting Wang
Keyword(s):  
Inertial Frame ◽  
Dead Reckoning ◽  
Alignment Algorithm ◽  
Map Matching ◽  
Positioning Error ◽  
Test Results ◽  
Initial Alignment ◽  
Integrated Map ◽  
Matching Algorithm ◽  
Land Vehicles

The paper introduces a novel in-motion SINS initial alignment algorithm using the inertial frame as computing reference. First, dead reckoning method is utilized with the help of the external odometer speed information aiming to eliminate the angular and linear moving disturbances. Second, in order to suppressing the divergence of the positioning error, a new integrated Map Matching algorithm is introduced which is able to reduce the effect of misalignment angle from coarse alignment for positioning error. Road test results show that this algorithm has greatly reduced the coarse alignment of directional accuracy and saved the requirements of speed and route for land vehicles. Not only is the mobility of land vehicle enhanced but also the accuracy of initial alignment of inertial navigation system is improved, which is meaningful in real application.

scholarly journals Integrated GNSS/IMU-Gyrocompass with Rotating IMU. Development and Test Results

2020 ◽  
Vol 12 (22) ◽  
pp. 3736
Author(s):  
Gennadiy Emel’yantsev ◽  
Oleg Stepanov ◽  
Aleksey Stepanov ◽  
Boris Blazhnov ◽  
Elena Dranitsyna ◽  
...  
Keyword(s):  
Inertial Measurement Unit ◽  
Fiber Optic ◽  
Measurement Unit ◽  
Prototype Model ◽  
Navigation Satellite ◽  
Test Results ◽  
Rotating Platform ◽  
Inertial Measurement ◽  
Urban Conditions ◽  
The Given

The paper presents the developed integrated GNSS/IMU gyrocompass which, unlike the existing systems, contains a single-axis rotating platform with two antennas installed on it and an inertial measurement unit with tactical grade fiber-optic gyros. It is shown that the proposed design provides attitude solution by observing the signals of only one navigation satellite. The structure of the integrated GNSS/IMU gyrocompass, its specific features and prototype model used in the tests are described. The given test results in urban conditions confirmed heading determination accurate to ±1.5° (3σ).

An Improved Initial Alignment Method of Strap-Down Inertial Navigation System on a Swaying Base

2013 ◽  
Vol 415 ◽  
pp. 143-148
Author(s):  
Li Hua Zhu ◽  
Xiang Hong Cheng
Keyword(s):  
Navigation System ◽  
Inertial Navigation System ◽  
Alignment Algorithm ◽  
Alignment Method ◽  
Initial Alignment ◽  
Vehicle Simulation ◽  
Robust Property ◽  
Simulation Results ◽  
Lever Arm Effect ◽  
The Impact

The design of an improved alignment method of SINS on a swaying base is presented in this paper. FIR filter is taken to decrease the impact caused by the lever arm effect. And the system also encompasses the online estimation of gyroscopes’ drift with Kalman filter in order to do the compensation, and the inertial freezing alignment algorithm which helps to resolve the attitude matrix with respect to its fast and robust property to provide the mathematical platform for the vehicle. Simulation results show that the proposed method is efficient for the initial alignment of the swaying base navigation system.

The Passive Resonator Fiber Optic Gyro and Comparison to the Interferometer Fiber Gyro

1987 ◽  
Author(s):  
R. Carroll ◽  
C. D. Coccoli ◽  
D. Cardarelli ◽  
G. T. Coate
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Gyro
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