Spacecraft inertial navigation method and system based on gravitational field, medium and equipment

Abstract

The invention relates to a spacecraft inertial navigation method and system based on a gravitational field, a medium and equipment. The method comprises the following steps: determining initial parameters; determining the time change rate and the six-dimensional number of geodesic line reference points at the current moment; acquiring actual measurement parameters of the spacecraft at the currentmoment; according to the initial parameters, the time change rate and the six-dimensional number of the geodesic line reference points at the current moment and the actual measurement parameters of the spacecraft at the current moment, calculating the six-dimensional number change amount of the spacecraft relative to the geodesic line reference points at the current moment; and calculating the six-dimensional number of the spacecraft at the current moment according to the six-dimensional number of the geodesic line reference point at the current moment and the six-dimensional number change amount, and taking the six-dimensional number as an initial parameter of the spacecraft at the next moment. On the basis of inertial navigation, a relativistic theory is used for further improving the navigation method, accumulated errors of inertial navigation along with time are avoided, and higher navigation precision is expected to be achieved.

Description

technical field [0001] The present invention relates to the field of navigation, in particular to a gravitational field-based spacecraft inertial navigation method, system, medium and equipment Background technique [0002] Military satellites, space stations and other major spacecraft are important guarantees for the implementation of space strategic deterrence and aerospace integrated military forces. This field requires high measurement accuracy for navigation systems. At present, there are three main space navigation methods for spacecraft at home and abroad: inertial navigation, satellite navigation and pulsar navigation. The three methods have their own advantages and disadvantages. At present, the navigation accuracy can only be improved through combined mode navigation or hardware equipment improvement, but there is no new breakthrough in theoretical algorithms. [0003] The main problem existing in the current inertial navigation technology is that the acceleration...

AI Technical Summary

Problems solved by technology

The three methods have their own advantages and disadvantages. At present, the navigation accuracy can only be improved through combined mode navigation or hardware equipment improvement, but there is no new breakthrough in theoretical algorithms.

[0003] The main problem existing in the current inertial navigation technology is that the acceleration needs to be integrated twice, resulting in an increase in the accumulated error over time, which affects the long-term positioning accuracy, and the theory of the spacecraft navigation model involves a wide range of gravitational field distribution and space-time bending effects. Relativistic effects cannot be ignored in this case

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