Arbitrary two-position north finder based on ring laser gyro and error analysis

Xue Haijian; Guo Xiaosong; Zhou Zhaofa; Wei Wanning

An arbitrary two-position north finder based on ring laser gyro was introduced. It can save the time of north finder to a certain extent. The solver formula of north finder in the whole attitude was derived. In order to improve the accuracy of north finder, the impact of the various errors including the drift of gyro, system circumference error and position transposition error on the accuracy of the arbitrary two-position north finder was analyzed theoretically, and the mathematical model of errors were established, and the method of reducing the error was proposed. Simulation result indicates that the position transformation under the level state bringing error of north finder is a constant, and is half of the position transformation. In order to ensure an enough high accuracy of north seeking, it requires the corner 40 and the latitude 70 of north finder in the course. The results of north finder further validate the correctness of the simulation results, consistent with the theoretical analysis.

1. State Key Discipline Laboratory of Armament Launch Theory and Technology,the Second Artillery Engineering University,Xi'an 710025,China;

2. Army Office Academy,Hefei 230031,China

Received Date: 2014-10-11

Rev Recd Date: 2014-11-20

Publish Date: 2015-06-25

Key words:

Abstract: An arbitrary two-position north finder based on ring laser gyro was introduced. It can save the time of north finder to a certain extent. The solver formula of north finder in the whole attitude was derived. In order to improve the accuracy of north finder, the impact of the various errors including the drift of gyro, system circumference error and position transposition error on the accuracy of the arbitrary two-position north finder was analyzed theoretically, and the mathematical model of errors were established, and the method of reducing the error was proposed. Simulation result indicates that the position transformation under the level state bringing error of north finder is a constant, and is half of the position transformation. In order to ensure an enough high accuracy of north seeking, it requires the corner 40 and the latitude 70 of north finder in the course. The results of north finder further validate the correctness of the simulation results, consistent with the theoretical analysis.

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Reference (25)

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Arbitrary two-position north finder based on ring laser gyro and error analysis

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