Orbit movement target parameter estimation system based on transient relative model

Abstract

Disclosed is a motion parameter estimation system for orbital maneuver targets based on a transient relative model, which belongs to the mechanics and control fields, wherein: an input information preprocessing module preprocesses the input information for providing the compatible real-time measurement and time-varying parameter information to a transient relative model module, the transient relative model module updates the input measurement content and time-varying parameters of the transient model in real time at the moment of measurement and sampling for feeding the updated model into a relative state estimation module, and the relative state estimation module obtains a relative state estimated value, one path of the relative state estimated value serves as the relative state output and the other path thereof is fed into a target maneuver identification module to make a one-step prediction of relative state through sampling delay, and the target maneuver estimated value output is obtained by using the maneuver parameter variable equation, thereby judging relative motion conditions accurately in real time. The system is also applicable to targets running on unknown tracks in unknown maneuver conditions, thereby benefiting achievements of such space tasks as long-term autonomous monitoring and tracking for maneuvering targets.

Description

technical field [0001] The invention relates to a navigation system in the field of mechanics and control, in particular to a system for estimating motion parameters of an orbital maneuvering target based on a transient relative model. Background technique [0002] Obtaining the relative motion laws of spacecraft in orbit has important application value, and is a necessary prerequisite for realizing rendezvous and docking, interception, position maintenance and other short-distance operations in space. The law of relative motion is mainly reflected in relevant motion parameters, such as relative position, speed, maneuvering and other vectors. Therefore, the key to mastering the law of relative motion in space is to establish an estimation system for motion parameters. [0003] At present, the motion parameter estimation system assumes that the orbit of the target spacecraft is known, that is, the target is in a free-moving orbit, or flies under known maneuvers and perturbati...

AI Technical Summary

Problems solved by technology

However, its shortcoming is that the article believes that the tracking spacecraft as the main star has no maneuvering, and this assumption is not always true in the actual environment

However, the traditional relative model will contain unknown maneuvering parameters that reflect the maneuvering of the target at this time. For this model with unknown parameters, how to accurately obtain motion parameters such as relative position, relative velocity, and target maneuvering through its state transition matrix, the existing literature does not not considered

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