Aiming at that the traditional analytical method for coarse alignment is not applicable for moving base, a new analytical method for moving base initial alignment based on gravity measurement was proposed. Firstly, a mid- frame was built in an inertial coordinate frame at the middle point of navigation time. Then gravity vectors in carrier frame and navigation frame were projected into the mid-frame, Sum and cross-product operations were done for projections at both sides of the mid-frame. Two 3-D spaces obtained were corresponding to the initial navigation frame and the initial carrier frame. Finally, several alignment processes were simulated and compared under different operation conditions. Results showed that the proposed method can be applied in moving base alignment, it is easy to realize in engineering, and it provides a certain guidance for alignment in motion of vehicle navigation systems.
王志伟1 秦俊奇1 杨功流2石志勇1狄长春1 王风杰3. 基于重力量测量的振动基座初始对准[J]. 振动与冲击, 2018, 37(3): 143-146.
WANG Zhi-wei1 QIN Jun-qi1 YANG Gong-liu2 SHI Zhi-yong1 DI Chang-chun1 WANG Feng-jie3. Analytical method for moving base initial alignment based on gravity measurement. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(3): 143-146.
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