An optimal trajectory design method considering the constraint of a non-cooperative target no-fly zone

Abstract

The invention discloses an optimal orbit design method considering the constraint of a non-cooperative target no-fly zone, comprising the following steps: 1) establishing the earth inertia coordinatesystem EXYZ and the target spacecraft orbit coordinate system Txyz, setting the no-fly zone of the target spacecraft body and the no-fly zone of the target spacecraft sensor; 2) establishing a relative motion orbit model of the spacecraft, obtaining the solution of the relative motion orbit model of the spacecraft, eliminating the drift term, and then giving the conditions for tracking the initialposition and the final position of the spacecraft by use of the initial conditions; 3) constructing the analytical equation of the transfer trajectory; 4) constructing the mathematical expression ofthe constraint conditions of the no-fly zone, and then constructing the conditions to complete the orbital transfer avoiding the no-fly zone; 5) according to the analytical equation of the transfer trajectory, the mathematical expression of the constraint condition of the no-fly zone and the condition of avoiding the no-fly zone, completing the orbit transfer and designing the optimal transfer trajectory. The optimal trajectory of the no-fly zone constraint of the non-cooperative target can be obtained by this method.

Description

technical field [0001] The invention belongs to the technical field of on-orbit service for space non-cooperative targets, and relates to an optimal orbit design method considering the constraints of a no-fly zone for non-cooperative targets. Background technique [0002] In recent years, with the increasing number of spacecraft and space debris in orbit, on-orbit servicing has become more and more important. The general on-orbit service mission can be divided into three stages: the fly-around observation stage, the approach and rendezvous segment, and the service segment. The fly-around observation segment can obtain the target's motion information and its own property information in advance, including position, attitude, and inertia. parameters etc. Especially for non-cooperative targets, it is very important to obtain information in advance. However, the observation accuracy of long-distance observation is limited by the accuracy of the sensor, and the resulting observa...

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Problems solved by technology

However, these methods are aimed at cooperative goals, and for non-cooperat

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