Thermo-decoupling expandable truss system applicable to space planar antenna

Abstract

A thermo-decoupling expandable truss system applicable to a space planar antenna comprises a thermo-decoupling rectangular frame and an expandable truss. A thermo-decoupling function of bottom frame connectors can be used for releasing in-plane degrees of freedom of the planar antenna to keep a mounting foundation of the expandable truss unchanged under high and low temperature conditions, and in-orbit reliable expansion into a stable truss supporting system can be guaranteed. The expandable truss is contracted in a launching stage to bear load in the launching stage and can be expanded reliably to provide sufficient expansion rigidity and precision for the planar antenna after injection. The technical defect of failure in keeping profile accuracy of an existing antenna supporting structure in space severe temperature field is overcome, the system is available for thermo-decoupling with the antenna to release thermal stress, and the requirement of the antenna on a high-accuracy high-rigidity expandable supporting structure can be met.

Description

technical field [0001] The present invention relates to a deployable support truss system. Background technique [0002] The large payloads of the spacecraft, such as antennas and solar wings, need to be folded and folded into a smaller volume during launch to withstand the assessment of various mechanical and environmental conditions; In the low temperature environment, it is necessary to maintain a high profile accuracy. [0003] During the launch phase, the truss is folded and folded on the back of the antenna, and is fixedly connected to the antenna panel to bear the load during the launch phase; after the satellite enters orbit, the truss is unfolded and locked into a three-dimensional configuration, which is used to maintain the stiffness and accuracy of the antenna. When the antenna is flying in orbit, the temperature field of the whole system is harsh and uneven, and the deformation of the antenna and the truss is not coordinated, resulting in a large internal stres...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, the present invention provides a thermally decoupled expandable truss system suitable for space panel antennas, which can realize the deployment and locking of large spacecraft antenna wings after launching and deploying into orbit. The function of stabilizing the support structure overcomes the technical deficiency that the accuracy of the existing antenna support structure cannot be maintained under the harsh temperature field. It can be thermally decoupled from the antenna to release thermal stress and meet the needs of the antenna for high-precision, high-rigidity expandable support structures. needs

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