Optical fiber inertial navigation system and on-orbit alignment method of optical fiber inertial navigation for air-space-ground integrated aircraft

Abstract

The invention discloses an inertial navigation on-orbit alignment method, which is suitable for an air-space-ground integrated aircraft. The method includes the following steps: judging that the air-space-ground integrated aircraft is in an on-orbit state according to the added table data of the aircraft inertial navigation and GNSS speed information ; Use the star sensor information received by the inertial navigation system, GNSS information and the attitude, velocity and position information calculated by the inertial navigation system to construct a filter measurement, and complete the initial value of the attitude, velocity and position of the aircraft on orbit through the Kalman filter At the same time, the on-orbit alignment failure mechanism of the air-space-ground integrated aircraft inertial navigation system is analyzed, and the judgment threshold is given. The invention effectively solves the problem of determining the initial attitude, speed and position of the fiber optic inertial navigation system of an air-space-ground integrated aircraft, provides a fault judgment mechanism, has high alignment accuracy, and is easy to implement.

Description

technical field [0001] The invention relates to the field of aerospace, in particular to an on-orbit alignment method for an optical fiber inertial navigation system of an air-space-ground integrated aircraft. Background technique [0002] The air-space-ground integrated aircraft has the functions of both aviation and aerospace platforms. It can not only fly at hypersonic speed in the atmosphere like ordinary aircraft, but also enter space like rockets and satellites, and can flexibly conduct orbital maneuvers. Air-space-ground integrated aircraft has revolutionary advancements such as reusability, low launch costs, maintainability, turnaround time, and flexible mobility. It also has great military potential and is the weapon of choice for future control of space and competition for space dominance. platform. [0003] The entire flight mission of the space-space integrated aircraft spans two different fields of aviation and aerospace. When the space-space integrated aircraf...

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a fiber optic inertial navigation system and a fiber optic inertial navigation on-orbit alignment method for an air-space-ground integrated aircraft for the special space environment of the aircraft in orbit, so as to solve the problem of The initial attitude, speed and position cannot be determined due to poor navigation accuracy at the initial stage of orbit or aircraft inertial navigation restart

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