Evaluation method and system for spin separation trajectory and collision probability of stacked satellites

Abstract

The invention provides an evaluation method and system for a spin separation trajectory and a collision probability of stacked satellites, and relates to the technical field of separation trajectory and collision probability evaluation.The method comprises the steps that S1, the principle of motion relativity is used to establish a reference system through fixed coordinates of any satellite body; S2, relative velocity vectors of other satellites in the same layer to the reference system are established; S3, the relative velocity vectors are projected into the reference system and integrated in the reference system to obtain motion trajectory analytic solutions of other satellites relative to the reference system; and S4, rotational motion of the satellites can be ignored based on trajectories, and relative motion between the satellites is simplified into translational motion according to the trajectories, so that collision probabilities of the satellites can be estimated. According to the invention, the complexity of collision risk evaluation in a satellite separation link can be obviously reduced, and reference is further provided for making a stacked satellite group separation strategy.

Description

technical field [0001] The present invention relates to the technical field of evaluation of separation trajectory and collision probability, in particular to an evaluation method and system for stacking satellite spin separation trajectory and collision probability. Background technique [0002] The evaluation method applicable to the spin-separation trajectory and collision probability of stacked satellites is directly related to the safety of stacked satellites after separation. Stacking each satellite itself does not have a single spring or explosive bolt, and cannot rely on the deployment mechanism to provide separation action, but is deployed very slowly with the spin of the upper stage. A single satellite is generally approximated as a two-dimensional flat plate structure, which generally uses spin separation. The disadvantage is that it may cause collisions between satellites, especially between satellites on the same layer, and bring serious safety risks to spacebor...

AI Technical Summary

Problems solved by technology

A single satellite is generally approximated as a two-dimensional flat plate structure, which generally adopts spin separation. The disadvantage is that it may cause collisions between satellites, especially between satellites on the same layer, and bring serious safety risks to spaceborne equipment.

[0003] From the force state after separation, after the satellite group is unlocked, ignoring the friction effect and orbital angular velocity between satellites, each satellite has both translational motion in the inertial system and uniform rotation, plus the actual satellite’s own outline The complexity of the collision analysis brings difficulties

Images