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Error Analysis of the K-Rb-21Ne Comagnetometer Space-Stable Inertial Navigation System
Qingzhong Cai1, Gongliu Yang2, Wei Quan3
1School of Instrument Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China. qingzhong_cai@163.com.
Abstract:
According to the application characteristics of the K-Rb-21Ne comagnetometer, a space-stable navigation mechanization is designed and the requirements of the comagnetometer prototype are presented. By analysing the error propagation rule of the space-stable Inertial Navigation System (INS), the three biases, the scale factor of the z-axis, and the misalignment of the x- and y-axis non-orthogonal with the z-axis, are confirmed to be the main error source. A numerical simulation of the mathematical model for each single error verified the theoretical analysis result of the system's error propagation rule. Thus, numerical simulation based on the semi-physical data result proves the feasibility of the navigation scheme proposed in this paper.
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