Medium and long distance space non-cooperative target orbit maneuver detection method

Abstract

The invention discloses a medium and long distance space non-cooperative target orbit maneuver detection method, which comprises the following steps: taking relative angular momentum of a spacecraft as a center test parameter, establishing a relative kinetic model by a linearized relative motion equation, and carrying out relative measurement in a manner that an optical camera installed deviating from the mass center of a tracking satellite only measures an angle; setting a maneuver detection threshold value through a correlation coefficient of data in a sudden change simulation array and a sliding window, so that orbit maneuver detection of any in-orbit target satellite is realized, and measurement and tracking of any target satellite which may maneuver by a simple algorithm are realized through a mode of restarting a filter. According to the method, the calculation steps are simplified, the maneuvering detection accuracy of the short-range kilometer-level target satellite is improved, and improvement is carried out for the long-range hundred-kilometer-level target satellite.

Description

technical field [0001] The invention belongs to the field of autonomous relative navigation in space, and relates to a method for detecting orbital maneuvering of non-cooperative targets in medium and long-range space. Background technique [0002] In order to ensure the safety of spacecraft in orbit, it is necessary to improve the situational awareness in space to monitor targets that may pose contact threats to orbiting spacecraft. It is relatively simple to observe the motion state of free-flying targets. There are many effective methods. However, it is more difficult to observe the targets that will perform orbital maneuvers. The first problem to be solved is to determine whether the maneuver has occurred. That is, the detection of orbital maneuvers. [0003] The main difficulty in the detection of orbital maneuvers is: for orbital maneuvers that provide a small specific impulse, the motion state of the target changes very little in a short time, and it is easily submer...

AI Technical Summary

Problems solved by technology

However, there are several defects in this method: 1. There is a contradiction between missed detection and misjudgment in the determination method of the threshold mentioned in this method, which reduces the accuracy of detection in theory; 2. It is not discussed in the patent method For the detection effect of long-distance targets, its maneuvering detection error for targets at a distance of hundreds of kilometers is relatively large

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