A large elliptical orbit transfer planning method for spacecraft returning to a predetermined landing point

Abstract

The invention relates to a large elliptical orbit transfer planning method for a spacecraft returning to a predetermined landing point, comprising the following steps: a. Determining a spacecraft orbit entry condition and a spacecraft terminal constraint condition; (b) determine parameter variable and planning constraints of spacecraft orbit transfer planning; C. Setting up the orbit-changing programming equation of high-speed reentry of large ellipse; D. planning Orbit transfer of the spacecraft and calculating orbit transfer parameters; E. Orbiting prediction based on the initial orbit of the spacecraft and the orbit transfer parameters; F. Calculating the re-entry distance of the spacecraft to obtain the re-entry distance difference; (g) feeding back the reentry range difference to theorbit transfer planning, and adopting nonlinear programming iteration to calculate the required orbit and the orbit transfer parameted sequence. The large elliptical orbit transfer planning method ofthe spacecraft returning to the predetermined landing point can solve the orbit transfer planning problem of a near-earth spacecraft returning to a large elliptical orbit at a high speed.

Description

technical field [0001] The invention relates to a large elliptical orbit change planning method for a spacecraft returning to a predetermined landing point. Background technique [0002] The orbit formed by the carrier rocket launching the spacecraft into orbit is called the orbit. The orbit of the spacecraft before returning becomes the orbit. The running track during the return process is called the return track. The orbital orbit of returnable spacecraft flying around the earth is usually a near-circular low-orbit orbit. After orbit change, it can reach a large elliptical orbit with high orbital energy. After carrying out scientific experiments in the large elliptical orbit, it needs to return to the predetermined landing point , Recover the test samples and related equipment. Return refers to the process that the spacecraft enters the earth's atmosphere along its orbit or transition orbit after orbit change, decelerates and lands under the action of aerodynamic force....

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the orbit change planning problem of large ellipse high-speed reentry and return of near-Earth spacecraft, and provide a large ellipse orbit change planning method for the spacecraft to return to the predetermined landing point

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