Time and frequency domain mixed identification method of non-cooperative target motion and inertial parameters

A non-cooperative target and inertial parameter technology, applied in the field of time-frequency domain hybrid identification of non-cooperative target motion and inertial parameters, can solve the problems of long processing time, unknown motion state and inertial parameters, unfavorable identification accuracy and fuel consumption, etc.

Active Publication Date: 2018-02-16
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0003] The premise of space operation is to capture the target. Since the captured target is a non-cooperative target, its motion state and inertia parameters are unknown, which has a great impact on the capture and the stability control of the complex after capture. Some research results and experiments are aimed at cooperative targets whose parameters are known, or use incentives to identify them, and need to be physically connected to the target, which ...

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  • Time and frequency domain mixed identification method of non-cooperative target motion and inertial parameters
  • Time and frequency domain mixed identification method of non-cooperative target motion and inertial parameters
  • Time and frequency domain mixed identification method of non-cooperative target motion and inertial parameters

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Embodiment Construction

[0112] Now in conjunction with embodiment, accompanying drawing, the present invention will be further described:

[0113] In order to achieve the above object, the technical solution adopted in the present invention comprises the following steps:

[0114] 1) The relative pose information of the non-cooperative target obtained by the visual camera

[0115] 2) According to the target pose information obtained by the visual camera and the spacecraft motion equation, the frequency-domain optimal filter is used to estimate the centroid position and translational velocity of the non-cooperative target.

[0116] 3) According to the target pose information obtained by the visual camera and the spacecraft motion equation, the extended finite impact corresponding filter is used in the time domain to estimate the motion angular velocity and inertia parameters of the non-cooperative target.

[0117] In described step 1), the specific steps of calculating the coordinates of the target in...

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Abstract

The invention relates to a time and frequency domain mixed identification method of non-cooperative target motion and inertial parameters. Firstly, target pose information is obtained through a visioncamera. According to the invention, on the basis of visual measurement of target pose, translation and rotation in motion course are decoupled, time and frequency domain synchronous identification oftarget states and kinetic parameters is achieved, translation-related parameters are identified by DFT in the frequency domain, kinetic equation of a target floating in a space is linearized in the time domain, and rotation-related parameters are identified by EFIR.

Description

technical field [0001] The invention belongs to the field of spacecraft parameter identification, and relates to a time-frequency domain hybrid identification method of motion and inertia parameters of a non-cooperative target. Background technique [0002] Space operations, as the direction of future aerospace technology development, are getting more and more attention from aerospace powers. The space manipulator robot consisting of a platform base and an operating manipulator can be widely used in on-orbit service tasks such as on-orbit refueling, maintenance of faulty satellites, orbital garbage cleaning, and auxiliary orbit changes. The space manipulator robot is a kind of space robot, which has a large working space and dexterous operation performance. It has become the main means of current space operations. [0003] The premise of space operation is to capture the target. Since the captured target is a non-cooperative target, its motion state and inertia parameters ...

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Application Information

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IPC IPC(8): G01C21/10G01M1/12
CPCG01C21/10G01M1/125
Inventor 黄攀峰韩冬刘正雄孟中杰张夷斋张帆
Owner NORTHWESTERN POLYTECHNICAL UNIV
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