Position signal damping method of inertial navigation system based on variable damping coefficient

Abstract

The invention provides a position signal damping method of an inertial navigation system based on variable damping coefficient. The method mainly comprises the steps of determining the introduction position of a signal damping network, treating the signal damping network and introducing a signal treatment network into the inertial navigation system. The method has the advantages and the characteristics that the introduction of parameters of a position damping network can realize the effective damping of periodic oscillation errors of the earth and greatly improve the precision of the system; although the introduction of the three-order position damping network increases the realization difficulty, the performances thereof are better than those of the first-order and the second-order damping networks; and the introduction of the position damping network with the variable damping coefficient can greatly improve the adaptability to the motion of ships and lead the method to be more applicable to a variety of motorized motion states of the ships.

Description

(1) Technical field [0001] The invention relates to a method for an oscillation error signal of an inertial navigation system, in particular to a method for determining the damping scheme of an azimuth signal in a fixed-north semi-analytic full-damping inertial navigation system. (2) Background technology [0002] Inertial Navigation System (INS for short) uses inertial components (gyroscopes, accelerometers) to measure the motion parameters of the carrier relative to the inertial space, and under the given initial conditions of motion, the navigation computer calculates the motion parameters of the carrier. An autonomous navigation system with velocity, position and attitude information. Since it does not rely on external information such as external light, electromagnetic waves, sound waves, and magnetic fields, it can continuously provide navigation and positioning information of the carrier autonomously for a long time. [0003] According to the electromechanical platfo...

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Problems solved by technology

Therefore, the azimuth damping network with a single damping coefficient cannot adapt to the complex maneuvering state of the ship

[0012] 2. Through the analysis of the closed-loop system introduced into formula (1), it can be seen that the damping coefficient corresponding to formula (1) is less than 0.5, which is inconsistent with the one indicated in the literature

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