Rapid damping method of strap-down inertial navigation system

Abstract

The invention provides a rapid damping method of a strap-down inertial navigation system, comprising the following steps: 1, carrying out preheating preparation n on the strap-down inertial navigation system; 2, carrying out initial alignment on the strap-down inertial navigation system; 3, conducting forward attitude matrix updating; 4, conducting forward speed updating; 5, conducting forward position updating; 6, storing the above data, and conducting initial reassignment of the attitude matrix, speed, and position, conducting reversible algorithm of the rap-down inertial navigation system; 7, conducting reverse attitude matrix updating; 8, conducting reverse speed updating; 9, conducting reverse position updating; and 10, conducting initial reassignment of the attitude matrix, speed, and position again, and repeating the step 3 to 9. According to the invention, the characteristics of mathematics platform variation of the strap-down inertial navigation system are fully utilized, a reversible algorithm is introduced, and the rapid convergence of system errors of the strap-down inertial navigation system is finally realized. The method disclosed herein can be used in the field of navigation error inhibition of marine strap-down inertial navigation systems.

Description

technical field

[0001] The invention relates to a fast suppression method for navigation errors of a strapdown inertial navigation system. Background technique

[0002] The ship strapdown inertial navigation system requires to provide high-precision navigation information under long-time working conditions. The accuracy of the inertial navigation system can be improved by improving the accuracy of the components, accurate calibration of the error parameters of the components and the improvement of the initial alignment method, but how to make full use of the existing technical conditions in the use of the ship strapdown inertial navigation system, adopt Efficient error suppression means to maximize the accuracy of the system is a topic that needs to be studied in depth in the inertial navigation program. At present, the strapdown inertial navigation system often adopts the method of introducing damping to suppress the oscillatory system error. For azimuth damping, the eart...

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