Rapid start-up capability is an important indicator for inertial navigation systems.In or-der to meet the requirement of rapid initial alignment for vehicles and weapon systems,a closed-loop backtracking coarse alignment method is proposed based on Kalman-filtering-based coarse a-lignment,and a pricewise integration vector construction method is designed,which can construct more non-collinear vectors during multiple backtracking processes,further reducing the amount of data required for coarse alignment and improving accuracy.Through experiments of 30 s and 50 s coarse alignment on a three-axis turntable and a vehicle,the accuracy of this algorithm is better than that of optimization-based alignment and Kalman-filtering-based coarse alignment in a short period of time,which can meet the requirement of rapid initial alignment.
Fast alignmentBacktrackingInertial navigationInitial alignment
维普
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