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System and method for verifying infinite-mass parachute opening strength of parachute

A parachute and quality technology, applied in the aerospace field, can solve problems such as unsuitable parachutes, and achieve the effect of accurate data

Active Publication Date: 2020-04-07
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the limitation of the size of the existing domestic wind tunnel, it is not suitable for larger parachutes

Method used

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  • System and method for verifying infinite-mass parachute opening strength of parachute
  • System and method for verifying infinite-mass parachute opening strength of parachute
  • System and method for verifying infinite-mass parachute opening strength of parachute

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] refer to figure 1 , showing that the embodiment of the present invention provides a schematic structural diagram of a system for verifying the parachute opening strength of infinite mass, including: an airdrop model, a pyrotechnic device, a control device, a measuring device, a parachute device, an airdrop model and a helicopter (such as figure 2 Shown) connection, consisting of the front cabin and the test umbrella cabin.

[0056] The parachute device includes a test parachute and a main parachute, the test parachute is pre-installed in the test parachute cabin, and the main parachute is pre-installed in the front cabin.

[0057] The control device includes an on-board release control device and an on-cabin recovery control device, and the on-cabin recovery control device includes a pitot.

[0058] The pyrotechnic device can be used to complete the release of the airdrop model, and to test the connection and separation of the umbrella cabin and the front cabin.

[005...

Embodiment 2

[0084] refer to Figure 7 , shows a flow chart of the steps of a helicopter airdrop test method for verifying the strength of a parachute under the condition of infinite mass parachute opening provided by an embodiment of the present invention, the method may include:

[0085] After completing the connection between the airdrop model and the helicopter, turn on the manual switch of the measuring device and the recovery control device, and start the measuring device;

[0086] Controlling the helicopter to release the airdrop model through a pyrotechnic device;

[0087] 0.2s after the airdrop universal controller is started, issue the command to destabilize the parachute;

[0088] After the stabilizing parachute is disengaged, judge whether the dynamic pressure measured by the pitot tube meets the parachute opening dynamic pressure requirement of the test parachute through the general controller;

[0089] When the parachute-opening dynamic pressure meets the parachute-opening ...

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Abstract

The embodiment of the invention provides a system and method for verifying the infinite-mass parachute opening strength of a parachute. According to the system, an air-drop model is connected with a helicopter and is composed of a front cabin and a test parachute cabin; a parachute device comprises a test parachute and a main parachute, the test parachute is installed in the test parachute cabin in advance, and the main parachute is installed in the front cabin in advance; a control device comprises an onboard throwing control device and an onboard recovery control device, the onboard recoverycontrol device comprises an airspeed head, and an initiating explosive device is used for completing throwing of the air-drop model and connection and separation of a test parachute bay and a front bay; the onboard throwing control device is used for controlling throwing of the air-drop model; the onboard recovery control device is used for realizing recovery control on the air-drop model; a measuring device is used for measuring the flight altitude and the vacuum speed of the airdrop model; and the airspeed head is used for measuring the parachute opening dynamic pressure of the test parachute. According to the invention, the obtained parachute opening load data can be more accurate, so that the purpose of verifying the infinite-mass parachute opening condition strength of the parachuteis achieved.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a system and method for verifying the opening strength of a parachute with infinite mass. Background technique [0002] In the field of aerospace, the parachute is an important aerodynamic deceleration and stabilization device. It is made of soft and breathable special textile materials. After inflation, it has a large resistance area, which can greatly reduce the speed of the recovery load. The load provides some stability. [0003] The parachute opening process is divided into infinite quality parachute opening and finite quality parachute opening. Under the two parachute opening conditions, the stress state of the parachute is different. In the process of parachute opening with infinite mass, the peak value of the parachute opening load generally appears at the moment when the bottom of the canopy is full, and the parachute opening load is all borne by the canopy, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D21/00
CPCB64D21/00
Inventor 鲁媛媛张兴宇张亚婧李健房冠辉王立武吕智慧贾贺黎光宇王帝李烨朱维亮张章王文强郭李杨
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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