A test device and test method for a negative-pressure flip-up umbrella

Abstract

A test device and test method for a negative pressure flip-up umbrella, using special umbrella cabin tooling to simulate the structure interface size and volume of the umbrella cabin, installing a deceleration parachute assembly, the umbrella cabin tooling is equipped with an interface to connect the deceleration parachute strap, and simulating the speed of the deceleration parachute. The installation and fixing state in the umbrella cabin; through the sealing structure, the umbrella cabin tooling is attached to the umbrella cabin cover to form a sealed cavity; vacuum pumps and other equipment are connected to the umbrella cabin tooling to reduce the air pressure in the umbrella cabin tooling sealing cavity, simulating the umbrella cabin cover The state of working under negative pressure; the pyrotechnic control device detonates the catapult between the umbrella hatch and the tooling of the umbrella cabin, and the ejection canopy pulls out the deceleration parachute assembly; at the same time, the pyrotechnic control device sends a wireless trigger signal to the high-speed camera measurement device, and the high-speed The camera measurement device records the test images. The invention provides a negative-pressure working environment for the retractor recovery system, so as to check and verify the ejection separation performance of the canopy cover.

Description

technical field [0001] The invention relates to a test device and a test method for a flip-up umbrella, in particular to a test device and a test method for a negative-pressure flip-up umbrella, belonging to the field of spacecraft ground tests. Background technique [0002] During the process of returning to the earth from the orbit around the earth, the returner descends at a high speed, and the returner interacts with the air, forming a relatively high aerodynamic pressure around the returner. The recovery system on the returner pulls out the parachute device by ejecting the umbrella hatch to decelerate the returner, thereby ensuring the safe landing of the returner. The aerodynamic pressure around the returner acts on the canopy cover from the outside to the inside, which to a certain extent weakens the effect of the catapult ejecting the canopy cover. Therefore, it is necessary to verify whether the canopy can be ejected and separated normally under negative pressure. ...

AI Technical Summary

Problems solved by technology

The aerodynamic pressure around the returner acts on the canopy cover from the outside to the inside, which to a certain extent weakens the effect of the catapult ejecting the canopy cover. Therefore, it is necessary to verify whether the canopy can be ejected and separated normally under negative pressure. Whether the speed meets the requirements and whether the drogue parachute and the drogue parachute can be separated normally

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