A method for estimating relative attitude angular rate of a spatial non-cooperative target based on iterative fourier transform

By using the iterative Fourier transform method and the periodic variation pattern of point cloud data measured by lidar, the relative attitude angular rate information of non-cooperative targets in space is extracted. This solves the problems of computational complexity and insufficient accuracy in existing technologies and achieves efficient attitude angular rate estimation.

CN118294924BActive Publication Date: 2026-07-24INNOVATION ACAD FOR MICROSATELLITES OF CAS +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INNOVATION ACAD FOR MICROSATELLITES OF CAS
Filing Date
2024-02-28
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing technologies are computationally complex and computationally intensive when estimating the relative attitude angular rate of non-cooperative targets in space, making it difficult to achieve high-precision estimation.

Method used

The iterative Fourier transform method is adopted, which utilizes the periodic variation law of point cloud data measured by lidar to convert time domain information into frequency domain information through Fourier transform, and extracts relative attitude angular rate information through iterative optimization.

Benefits of technology

It achieves high-precision estimation of the relative attitude angular rate of non-cooperative targets in space, simplifies the calculation process, reduces accumulated errors, and is applicable to targets with constant or small fluctuations in rotational angular velocity.

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Abstract

The application discloses a space non-cooperative target relative attitude angular rate estimation method based on an iterative Fourier transform. The method utilizes the periodic change rule of the point number of each frame of point cloud measured by a laser radar caused by the rotation of a space non-cooperative target, combines the Fourier transform method, converts the time domain change information of the point number of each frame of point cloud into the change in the frequency domain, further extracts the relative attitude angular rate information from the frequency characteristics, and further adopts the iterative Fourier transform to optimize the result, so that the optimal estimation of the relative attitude angular rate of the space non-cooperative target is realized. The method is relatively simple, the calculation amount is small, the relative attitude angular rate of the space non-cooperative target can be quickly obtained, can be used for autonomous relative attitude estimation and the like, the cumulative error in estimation is reduced, and is suitable for a non-cooperative tumbling target with constant or small fluctuation of the rotation angular velocity.
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