Autonomous rendezvous strategy for non-cooperative targets based on null space method

Abstract

The invention discloses an autonomous rendezvous strategy for non-cooperative targets based on a null space method, which is characterized in that firstly task analysis is performed on the autonomous rendezvous process in allusion to a non-cooperative target on-orbit service task, the whole rendezvous process is divided into a non-cooperative target butt joint capturing point tracking task and a collision avoiding task, priority ranking is performed on the two tasks, a null space corresponding to each basic task is solved, finally the two tasks are synthesized according to the null space method, the task with a low priority is projected to a null space of the task with a high priority, and thus the safety of a rendezvous trajectory is ensured. The autonomous rendezvous strategy based on the null space method provided by the invention is a multilevel hierarchical control method, and the task with a high priority can be ensured to be completed in the first place, so that conflicts between tasks with different priorities are avoided. The autonomous rendezvous strategy for the non-cooperative targets based on the null space method can simultaneously realize the requirements of non-cooperative target butt joint capturing point tracking and collision avoidance.

Description

technical field [0001] The invention belongs to the field of spacecraft dynamics, and in particular relates to an autonomous rendezvous strategy for non-cooperative targets based on a zero-space method. Background technique [0002] With the rapid development of space science and technology, human exploration of space has also increased dramatically in recent decades. So far, humans have successfully sent thousands of artificial satellites into orbit for a variety of space missions. However, just when all human beings are secretly happy for the great progress they have made, human beings have gradually realized that the space environment is deteriorating rapidly. At present, space debris is growing rapidly with a "Kessler" effect. At the same time, the existing satellites are not capable of repairing, and they can only be scrapped if they fail. In this case, the concept of space on-orbit service is widely mentioned, and at the same time, on-orbit service technology has bec...

AI Technical Summary

Problems solved by technology

Non-cooperative targets are usually in a rolling state under the influence of their own residual angular momentum and space complex perturbations, and the motion information of non-cooperative targets cannot be completely and accurately obtained by the serving spacecraft, which makes it very important for non-cooperative autonomous safe rendezvous. Difficulties

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