Satellite antenna reflector part pose coordination method and system based on geometric error

CN121935995BActive Publication Date: 2026-07-03NANJING UNIV OF AERONAUTICS & ASTRONAUTICS

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Filing Date: 2026-03-31
Publication Date: 2026-07-03

AI Technical Summary

Technical Problem

In the existing technology, it is difficult to control the surface accuracy, the edge gap is uneven, and the assembly error is easy to accumulate during the assembly of large satellite antenna reflectors, resulting in unstable assembly quality. In addition, traditional methods are time-consuming and labor-intensive, and are prone to damaging fragile materials.

Method used

A pose coordination method for satellite antenna reflector components based on geometric errors is adopted. A global coordinate system is established by a laser tracker, point cloud data is acquired by a scanner, multi-scale filtering and voxelization are performed, a joint control objective function is constructed, and rigid body transformation matrix is solved and virtual assembly is performed by combining topological adjacency relationship to achieve high-precision pose coordination of reflector sub-blocks.

Benefits of technology

It achieves high-precision positioning of reflector sub-blocks in a unified coordinate system, ensuring the electrical performance and mechanical assembly safety of the antenna, improving computational efficiency and final convergence stability, and solving the problem of difficult-to-control multi-source error coupling.

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Abstract

This invention relates to a method and system for pose coordination of satellite antenna reflector components based on geometric errors. The method includes establishing a global coordinate system, scanning raw point cloud data and performing multi-scale filtering and voxelization processing, dividing the processed point cloud data into effective surface points and edge feature points and obtaining their coordinates in the global coordinate system, establishing a joint control objective function including surface approximation error and gap uniformity error terms, locking the pose of the central fixed reflector, solving the rigid body transformation matrix of each reflector sub-block to be assembled according to spatial adjacency, and physically assembling each reflector sub-block to achieve pose coordination of the satellite antenna reflector components. This invention alleviates problems such as difficulty in controlling surface accuracy and uneven edge gaps during the assembly of large satellite antenna reflectors, achieving high-precision virtual assembly and pose correction of reflector sub-blocks.

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