Non-cooperative target relative navigation motion estimation method based on sequence image

A non-cooperative target and relative navigation technology, applied in the field of spacecraft relative navigation, can solve the problems of dependence on observation accuracy, small amount of calculation, and high processing difficulty

Inactive Publication Date: 2018-11-30
BEIJING INST OF SPACECRAFT SYST ENG
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Problems solved by technology

The method of measuring feature points has the advantages of small amount of calculation and fast speed, but it also has certain shortcomings: (1) The observation accuracy depends on the nature and observation conditions of the characteristics o

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  • Non-cooperative target relative navigation motion estimation method based on sequence image
  • Non-cooperative target relative navigation motion estimation method based on sequence image
  • Non-cooperative target relative navigation motion estimation method based on sequence image

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings.

[0047] The embodiment of the present invention uses laser ranging radar to obtain a series of distance images of non-cooperative targets in space, and uses them as input data to obtain relative navigation motion parameters of non-cooperative targets relative to active spacecraft. Such as figure 1 As shown, the non-cooperative target relative navigation motion estimation method based on sequence images includes the following steps:

[0048] Step 1: Establish a reference coordinate system OXYZ on the active spacecraft; use the laser ranging sensor on the active spacecraft to observe the space non-cooperative target, and the number of sensors is k. In the observation time period, the total number of sensor observation sampling is p times, and the sampling time is the tth time s measured every second.

[0049] t s =s T (1)

[0050] Wherein, s=0,1,2,...p, T is the samp...

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Abstract

The invention relates to a non-cooperative target relative navigation motion estimation method based on a sequence image. The implementation of non-cooperative target on-orbit tasks has high requirements for the relative speed, high precision and high reliability of relative navigation, especially when an active spacecraft does not rely on ground operations and independently completes relative navigation and guidance and control of non-cooperative targets. The method overcomes the deficiencies of the existing non-cooperative target relative navigation motion parameter estimation methods, and uses the sequence distance image as an input. The sequence distance image is used as input, the image is spatially discretized by a body unit, a non-cooperative target dynamic equation is used for Kalman filtering, which overcomes the limitations of a feature recognition method, improves the estimation accuracy and efficiency, and reduces the amount of data processing.

Description

technical field [0001] The invention belongs to the field of spacecraft relative navigation, and in particular relates to a method for estimating relative navigation motion of space non-cooperative targets. Background technique [0002] With the development of space missions, on-orbit service and space operation missions will not only be oriented to space cooperation goals, but also to space non-cooperation goals. Space non-cooperative targets refer to objects such as in-orbit invalid satellites and large space debris. The biggest difference from cooperative targets is that non-cooperative targets in space usually have no ability to output information. Therefore, accurately grasping the motion state and inertia parameters of space non-cooperative targets is the key and difficult point to successfully serve and operate non-cooperative targets. [0003] Because the motion state and inertial parameters of space non-cooperative targets can neither be obtained in advance nor th...

Claims

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Application Information

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IPC IPC(8): G01C21/24
CPCG01C21/24
Inventor 张志娟王大轶关晓东宫伟伟葛东明高珊郑世贵史纪鑫王泽宇
Owner BEIJING INST OF SPACECRAFT SYST ENG
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