Aiming to advance the coning algorithm performance of strapdown inertial navigation systems, a new half-compressed coning correction structure Film-Memory is presented.The half-compressed algorithm structure is analytically proven to be equivalent to the traditional compressed structure under coning environments.The half-compressed algorithm coefficients allow direct configuration from traditional compressed algorithm coefficients.
A type of algorithm error model is defined for coning algorithm performance evaluation under maneuver environment conditions.Like previous uncompressed algorithms, the half-compressed algorithm has improved maneuver AUTOMATICS accuracy and retained coning accuracy compared with its corresponding compressed algorithm.Compared with prior uncompressed algorithms, the formula for the new algorithm coefficients is simpler.