Horizontal damping method for rotating grid inertial navigation based on damping network

Abstract

The invention discloses a rotary grid inertial navigation horizontal damping method based on a damping network, and belongs to the technical field of inertial navigation systems. On the basis of grid inertial navigation mechanics arrangement, in order to effectively suppress the adverse effects of inertial device constant error on navigation accuracy, a single-axis rotation modulation grid inertial navigation system suitable for polar regions is designed; in order to effectively suppress inertial device random errors Due to the adverse effect on navigation accuracy, the outer horizontal damping algorithm of single-axis rotation modulation grid inertial navigation system suitable for polar regions is designed. Combining the grid inertial navigation system solution model, single-axis rotation modulation technology and external horizontal damping technology can effectively suppress the navigation error of the grid inertial navigation system accumulated over time caused by the error of the inertial measurement component, and improve the speed of the ship in the pole. Navigation accuracy when navigating in the area.

Description

technical field [0001] The invention belongs to the technical field of inertial navigation systems, and in particular relates to a horizontal damping method for rotary grid inertial navigation based on a damping network. Background technique [0002] The undamped inertial navigation system is essentially a critically stable system. Under the excitation of the constant error source, the system will generate periodic oscillation error, and its amplitude is not attenuated. Under the action of random error sources, the amplitude of the periodic component in the systematic error will increase with time. For inertial navigation systems that work for a long time, such as ship inertial navigation, such divergent errors will seriously affect their navigation and positioning capabilities. Therefore, in order to improve the use accuracy of inertial navigation, damping methods are generally used to suppress and attenuate oscillating errors. The usual practice is to add a correction n...

AI Technical Summary

Problems solved by technology

However, there are generally two main problems in this traditional damping method: 1) It is difficult to determine the parameters of the damping network, and repeated attempts are required; 2) When switching from the undamped state to the damped state, it will bring a large overshoot error

[0003] Due to the convergence of geographic meridians, geomagnetic force lines, and magnetic field anomalies in polar regions, the traditional magnetic compass-based aircraft positioning and orientation methods are no longer suitable for aircraft navigation in polar regions

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