A high-orbit natural fly-around trajectory correction method

Abstract

The invention discloses a high-orbit natural-flying-around-track correcting method. The high-orbit natural-flying-around-track correcting method includes the steps of at the flying-around starting point position, calculating to build the speed increment of a natural flying-around track, and outputting the speed increment to a thruster for execution; according to a flying-around-starting-point effective relative navigation result, based on a CW equation analytical solution, calculating the relative position, corresponding to the current moment, of a nominal track in an extrapolation mode; determining the position deviation between the relative position corresponding to the nominal track at the same phase angle and the relative position of the relative navigation result, building a deviation mark if the position deviation exceeds a preset threshold value, calculating the speed deviation between the relative speed, corresponding to the current phase angle, of the relative navigation result and the relative speed of the nominal track, calculating the acceleration control quantity according to the position deviation and the speed deviation, and calculating a pulse output command according to the acceleration control quantity. By means of the high-orbit natural-flying-around-track correcting method, the distance deviation caused by orbit perturbation and the error of an execution mechanism can be corrected, the flight track approaches an ideal closed oval under the perturbation-free condition to the maximum degree, and therefore the stable flying-around track is built.

Description

technical field [0001] The invention belongs to the technical field of relative motion control of high-orbit spacecraft, and relates to a nominal trajectory correction control method of natural orbiting. Background technique [0002] Due to the high value and precious orbital resources of high-orbit communication satellites and navigation satellites, on-orbit service for their failed satellites has become an important development direction. Before the approach operation, it is a necessary stage to fly around and observe it. Compared with the low orbit, the orbit period of the high orbit satellite is longer, not less than 24 hours, and the orbit is mainly affected by the uneven gravitational perturbation of the earth. Natural orbiting is to track the natural trajectory of the spacecraft rotating around the target spacecraft with one orbital period. According to the analytical solution of the linearized equation, it is a 2:1 positive elliptical trajectory, and the semi-major a...

AI Technical Summary

Problems solved by technology

However, the main payload camera for observation generally has no automatic focusing capability, or the autonomous focusing capability is weak, which requires that the flying trajectory must be known in advance, and the deviation value must be controlled within a range of tens of meters

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