A strap locking and releasing device for an expandable antenna

Abstract

The invention discloses a strap locking and releasing device for an expandable antenna, which is applied to the locking and releasing of the expandable antenna. Including: root expansion joints, pre-tensioning devices, composite strapping components and pyrotechnics. The composite strap assembly includes two composite straps, and the two ends of the two straps are respectively connected with the root expansion joint and the pre-tightening device, so as to connect the two straps together. The pre-tensioning device realizes locking and releasing through the pin puller of the pyrotechnic product, thereby realizing the locking and releasing function of the strap. The invention has the advantages of simple structure, convenient operation and high reliability. It can solve the problems of traditional rope-type and steel-belt-type wrapping hooks for reflectors, and can be extended and applied to the locking and releasing fields of various expandable structures, realizing locking and releasing under the requirement of large pre-tightening force, and has broad application potential. application prospects.

Description

technical field [0001] The invention relates to a tape locking and releasing device for an expandable antenna, which belongs to the technical field of space expandable structures. Background technique [0002] Tape locking and releasing technology is the key technology of the deployable antenna and the prerequisite for the successful deployment of the deployable antenna. Its reliability determines the success or failure of the deployable antenna. [0003] The function of the tape is to lock the antenna in the folded state during the active section of transfer, environmental test and launch. After the satellite enters the orbit, the tape is unlocked and unfolded under the command, and the antenna is unfolded immediately. , whose functional requirements are as follows: [0004] 1. The tape has sufficient pre-tightening force and strength to meet the requirements of passing the ground vibration test and transmitting the vibration load of the active section when the antenna is ...

AI Technical Summary

Problems solved by technology

[0007] The existing wrapping forms of space expandable structures mainly include rope belt, steel belt and chain belt. In the field of deployable antennas, the former two have problems caused by gravity or deployment impact in the ground deployment test of deployable antennas. The phenomenon of hooking or damaging the antenna due to the action, affecting the normal deployment of the deployable antenna

The Chinese patent application with the application number 201218000124.1 and titled "Chain Belt Type Spaceborne Frame Type Expandable Reflector Tape" introduces a chain type spaceborne frame type deployable reflector strap, which is not suitable for antennas The large load in the folded state is stepless preload, and its separation force is much greater than 1.2 times the connection force, the output impulse is large, and there is no independent installation point. The power supply cable must be routed along the tape to the root fixed point. After unlocking, it will follow the bag It is more complex with moving parts (including pyrotechnic cables and remnants)

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