System and method for three-dimensional attitude determination for aircraft

Abstract

The invention provides a system and a method for three-dimensional attitude determination for an aircraft. The system comprises an observation module, a model establishment module, a data query module, a data processing module, and an attitude solution module, wherein the observation module is used for measuring the light vibration directions of skylights in two mutually vertical directions in real time and automatically by virtue of a sky scattered light polarization character measurement system; the model establishment module is connected with the observation module and used for establishing the body coordinate system and the equatorial coordinate system of the aircraft in a computer; the data query module is connected with the observation module and used for obtaining the declination and the Greenwich hour angle of the sun at an observation time; the data processing module is connected with the observation module, the model establishment module and the data query module, and used for performing transformation processing on the data obtained by the observation module and the data query module in the established model coordinate system; and the attitude solution module is connected with the data processing module and used for establishing an equation set by virtue of the data output by the data processing module, solving and outputting a result.

Description

technical field [0001] The invention belongs to the technical field of navigation, and in particular relates to a three-dimensional attitude determination method for an aircraft based on sky light polarization characteristics. Background technique [0002] Sunlight is natural light, not polarized light itself. During the transmission process in the atmosphere, sunlight is scattered by atmospheric molecules or other particles, and becomes polarized light that only vibrates in a certain direction or is dominant in a certain direction. When the atmosphere is relatively When cleaning, Rayleigh scattering is dominant, and the scattered outgoing light is mainly linearly polarized light. [0003] The polarization characteristics can be described by the degree of polarization and the azimuth angle of polarization. Studies have shown that the polarization characteristics of the sky are closely related to the position of the sun, and the vibration direction of the electric vector at ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a three-dimensional aircraft attitude determination system, which solves the problem of difficulty in aircraft navigation real-time attitude determination in the prior art

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