Satellite-borne folding mobile antenna and locking method thereof

Abstract

The invention discloses a satellite-borne folding mobile antenna and a locking method thereof. The satellite-borne folding mobile antenna comprises a first bracket (2), a rotary shaft (5), an unlocking device (6) and a second bracket (8), wherein the first bracket (2) is connected with the second bracket (8) through the rotary shaft (5); two first auxiliary brackets (3) are fixed on the first bracket (2); a hole (11) through which a locking rod penetrates is formed in each first auxiliary bracket (3); two second auxiliary brackets (4) are fixed on the second bracket (8); a hole (16) through which the locking rod penetrates is formed in each second auxiliary bracket (4); and the locking rod penetrates through the hole (11) in each first auxiliary bracket (3) and the hole (16) in each second auxiliary bracket (4) and then compresses and fixes the first auxiliary bracket (3) and the second auxiliary bracket (4). The invention has the advantages that on the premise that the rigidity, strength and base frequency of the antenna are unchanged, the quantity of initiating explosive devices is decreased, the unlocking reliability of the antenna is improved, and the whole antenna structure is compact.

Description

technical field [0001] The invention relates to a folding locking method for a space-borne movable antenna, which is particularly suitable for a space-borne movable antenna with a diameter of the antenna reflector not greater than 1m and a fundamental frequency not higher than 60Hz. Background technique [0002] Space-borne movable antennas are widely used in satellites, spacecraft, space stations and other spacecraft, including movable antennas for relay terminals, movable antennas for inter-satellite data transmission, and movable antennas for spot beams. After the satellite is launched into orbit, the movable antenna needs to be detonated and unlocked by pyrotechnics, and the reliability of the unlocking of pyrotechnics directly determines the success or failure of the launch. It is well known that the more pyrotechnic devices are installed on the antenna, the lower the reliability of antenna unlocking. Such as figure 1 As shown, at present, most of my country's spacebo...

AI Technical Summary

Problems solved by technology

Each locking release device 6 includes 1 round of pyrotechnics, so all 4 rounds of pyrotechnics must be detonated. If 1 round is not detonated, it will directly cause the antenna to fail, and the satellite launch will fail.

[0003] The first bracket 2 and the second bracket 8 of the antenna are two parts that can rotate with each other. If the number of pyrotechnics is reduced without fixing the first bracket 2 and the second bracket 8, the fundamental frequency of the antenna will drop, causing the antenna The fundamental frequency and the entire satellite fundamental frequency are coupled, resulting in structural damage, or the antenna cannot meet its own stiffness and strength requirements

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