Design and Implementation of Thermal Stability Testing System for Large Spacecraft Structures
The thermal stability of structural surfaces is one of important indicators for spacecraft structural design,which plays an important role in achieving the functionality and performance of spacecraft in orbit vacuum low-temperature environment.To en-sure the correctness of structural thermal stability design,it is necessary to conduct thermal stability testing tests in space environ-ment on the ground.The research on the high-precision and high-frequency thermal stability deformation testing requirements of large-scale structures is conducted.By using optical photography in-situ deformation measurement technology,a multi camera fusion measurement system architecture and measurement method are designed,effectively ensuring the construction of the optimal deforma-tion measurement field for large structures.Through the intelligent synchronous control design of the system electromechanical and image acquisition devices,the automatic matching of spatial position attributes of image data is achieved.Through experimental verifi-cation,the results show that the system can meet the transient and high-precision structural deformation of large spacecraft no less than 4 m in vacuum and low-temperature environments,with a minimum measurement period of 90 s and unidirectional measurement accuracy better than 28 μm.The testing process runs stably and reliably.
large spacecraftstructurethermal stabilitydeformation measurementsystem design
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