Solar tdoa measurement method and integrated navigation method for formation flight

Abstract

The present invention discloses a solar TDOA measurement method and an integrated navigation method oriented to formation flight, including establishing a solar TDOA measurement model as follows, executing an orbital dynamics model oriented to formation flight for detectors in formation flight, and establishing a Mars direction measurement model , establish the inter-satellite link ranging model; use the extended Kalman filter EKF as the navigation filter, use the star sensor to obtain the celestial body orientation information, the inter-satellite link measurement value and the relative distance in the radial direction of the sun, combined with the formation The orbital dynamics model of the flying probe, under the action of the EKF, obtains the estimated position and velocity information of the probe. The present invention proposes a solar TDOA measurement technical solution for formation flight, which can provide relative position information in the radial direction; the present invention makes full use of a variety of navigation measurement information, and can be used for formation flight in the entire space The sensor provides absolute and relative navigation information with higher accuracy.

Description

technical field [0001] The invention belongs to the field of autonomous navigation of spacecraft, and in particular relates to a technical solution for autonomous navigation of formation flight based on astronomical direction-finding and ranging information. Background technique [0002] Formation flight is a new field in aerospace technology. Flying in formation can increase redundancy, reduce costs, and provide a multi-point platform. In the field of deep space exploration formation flight, both absolute and relative navigation accuracy are very important, especially relative navigation accuracy. [0003] The autonomous navigation of deep space exploration often uses the measurement information of the sun for navigation, including angle measurement, velocity measurement and distance measurement. Solar angle measurement navigation uses the sun's azimuth vector as the measurement information. This method is the most traditional, but the distance between the probe and the s...

AI Technical Summary

Problems solved by technology

Xiong Kai combines pulsar navigation and inter-satellite links to improve relative navigation accuracy, but relative navigation accuracy is still limited and needs to be improved

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