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Study on Gyrocompass Alignment for SINS

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Tutor: WuMeiPing
School: National University of Defense Science and Technology
Course: Control Theory and Engineering
Keywords: SINS,Compass alignment method,Navigation control algorithm
CLC: TN966
Type: Master's thesis
Year:  2005
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Abstract:
The initial alignment technique is one of the key technologies of the inertial navigation system , the rapidity and accuracy of the initial alignment is directly related to the performance of the SINS . Thesis the the compass alignment method SINS for the purpose of depth theoretical , experimental and applied research . Theoretically , strapdown inertial navigation system error model , combined with the compass alignment principle the establishment of the compass aligned mathematical model . On this basis , the design of algorithms and control processes , and based on control theory to select the appropriate control parameters . Theoretical analysis , simulation data for a variety of external conditions that may arise Simulation results verify the correctness of the algorithm and parameter selection . Simulation results show that : 500s within the system alignment accuracy of 0.1 ¡ã, and is suitable for high-latitude regions . The vehicle test data offline analysis, the test measured using GPS velocity information is measured as an outer reference velocity information , during the movement of the vehicle to maintain a working state of alignment systems . Navigation solver results obtained with GPS measured for comparative analysis, navigation accuracy of GPS accuracy equivalent to that speed accuracy of 0.2m / s, the horizontal position accuracy of 10m .
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