CN204373932U - Astable body air-drop parachute-opening simulation test device - Google Patents

Abstract

The utility model discloses a kind of astable body air-drop parachute-opening simulation test device, comprise body, release platform, input fixator and adjusting rope, the rear end of body is provided with umbrella storehouse, the stage casing of body is installed on below release platform by throwing in fixator, position below release platform between input fixator and umbrella storehouse is provided with fixed block, one end of adjusting rope is connected with fixed block, and be connected with body by rope pin after the other end winding body of adjusting rope, rope is sold for the latch with becket bridle.Carry out astable body air-drop parachute-opening simulation test by astable body air-drop parachute-opening simulation test device described in the utility model, the body parachute-opening rule under serial flying speed, unstability roll angle speed and unstability pitch rate condition can be obtained; The opening process under actual projectile flight attitude can be simulated by default roll angle speed and pitch rate, meet the development demand dropping or shed weapon.

Description

Astable body air-drop parachute-opening simulation test device

Technical field

The utility model relates to a kind of air-drop simulation test device for giving the initial unstability attitude of body, particularly relates to a kind of astable body air-drop parachute-opening simulation test device.

Background technology

In present stage, the stability study of parachute-bomb is still based on experimental study.To drop or to shed weapon, normally throw in body by aircraft platforms, body is separated rear time delay a period of time with release platform, and deceleration drogue of dishing out realizes the gesture stability to body.In Practical Project practice, often due to the extremely unstable of air-drop body aerodynamic configuration, cause air-drop body, after air-drop action, attitude instability occurs, body attitude unstability can cause umbrella bullet to be wound around, thus brings great difficulty to body opening process.Body unstability causes parachute to be wound around, can not to open by predetermined way, thus causes body not fall into desired target location, causes preplanned mission failure.

Because actual flying test costs dearly, traditional simulation experiment method typically uses aircraft, hot air balloon, high tower etc. and replaces aircraft to complete the airdrop test of body development stage, to obtain corresponding parachute-opening data.But such test method is taked directly to throw in mode at present, throw in actual flying test body and there is the difference such as flying speed, incoming flow effect, result through parachute-opening rule when such air-drop simulation test cannot draw body unstability, be difficult to reach checking body with the test objective of the aerial parachute-opening of the astable flight attitude of reality.

Utility model content

The purpose of this utility model is just to provide a kind of astable body air-drop parachute-opening simulation test device that can obtain body parachute-opening rule to solve the problem.

The utility model is achieved through the following technical solutions above-mentioned purpose:

A kind of astable body air-drop parachute-opening simulation test device, comprise body, release platform, input fixator and adjusting rope, the rear end of described body is provided with umbrella storehouse, the stage casing of described body is installed on below described release platform by described input fixator, position below described release platform between described input fixator and described umbrella storehouse is provided with fixed block, one end of described adjusting rope is connected with described fixed block, is connected with described body by rope pin after the other end of described adjusting rope is wound around described body, it is latch with becket bridle that described rope is sold.

In said structure, adjusting rope and fixed block cooperation can realize controlling the initial unstability attitude of body, and this is important innovations of the present utility model point, and this structure efficiently solves the problem that tradition directly throws in the initial unstability attitude of uncontrollable body.

In order to cushion tensile impact when adjusting rope is tightened and between body, be clearance fit between described rope pin and described body.

As preferably, the coiling length L of described adjusting rope on described body is determined by following formula:

$L=\frac{{3r}^2{\mathrm{\ω}}_0^2}{4g}$

In formula, r is body radius, and g is acceleration of gravity, ω ₀for needing the body roll angle speed of simulation.

Distance D between the barycenter of described fixed block and described body is determined by following formula:

$D=\frac{{2J}_f{\mathrm{\ω}}_f}{{\mathrm{mr\ω}}_o}$

In formula, r is body radius, J _ffor the moment of inertia of body pitch orientation, m is Shell body quality, ω ₀for needing the body roll angle speed of simulation, ω _ffor needing the body pitch rate of simulation.

The beneficial effects of the utility model are:

Owing to adding adjusting rope and the initial instability status of fixed block to body controls, so carry out astable body air-drop parachute-opening simulation test by astable body air-drop parachute-opening simulation test device described in the utility model, have the following advantages:

(1) unstability roll angle speed and pitch rate can be preset under given flying speed;

(2) the body parachute-opening rule under serial flying speed, unstability roll angle speed and unstability pitch rate condition can be obtained;

(3) opening process under actual projectile flight attitude can be simulated by default roll angle speed and pitch rate, under body unstability attitude, parachute-opening research provides more effective test method, meet the development demand dropping or shed weapon.

Accompanying drawing explanation

Fig. 1 is the structural representation of astable body air-drop parachute-opening simulation test device described in the utility model.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail:

As shown in Figure 1, astable body air-drop parachute-opening simulation test device described in the utility model comprises body 8, release platform 1, throw in fixator 2 and adjusting rope 5, the rear end of body 8 is provided with umbrella storehouse 4, the stage casing of body 8 is installed on below release platform 1 by throwing in fixator 2, position below release platform 1 between input fixator 2 and umbrella storehouse 4 is provided with fixed block 3, one end of adjusting rope 5 is connected with fixed block 3, the other end of adjusting rope 5 is wound around the rear rope pin 6 that passes through of body 8 and is connected with body 8, rope pin 6 is the latch with becket bridle, be clearance fit between rope pin 6 and body 8.

As shown in Figure 1, the coiling length L of adjusting rope 5 on body 8 is determined by following formula:

$L=\frac{{3r}^2{\mathrm{\ω}}_0^2}{4g}$

In formula, r is the radius of body 8, and g is acceleration of gravity, ω ₀for needing the roll angle speed of the body 8 of simulation.

Distance D between the barycenter 7 of fixed block 3 and body 8 is determined by following formula:

$D=\frac{{2J}_f{\mathrm{\ω}}_f}{{\mathrm{mr\ω}}_o}$

In formula, r is the radius of body 8, J _ffor body 8 is at the moment of inertia of pitch orientation, m is the quality of body 8, ω ₀for needing the roll angle speed of the body 8 of simulation, ω _ffor needing the pitch rate of the body 8 of simulation.

As shown in Figure 1, during test, according to L and D calculated, fixed block 3, input fixator 2, body 8 and adjusting rope 5 are installed on release platform 1; After carrying out the preparation of other test observations by experimental test requirement, trigger and throw in fixator 2, release body 8; Attitude pitching and rolling unstability is there is by design in advance in body 8 dropping process under the effect of adjusting rope 5; After body 8 unstability, umbrella storehouse 4 reaches predetermined delay time and triggers parachute-opening action, and the drag parachute in umbrella storehouse 4 is dished out and parachute-opening, and the opening process under observation body 8 unstability attitude and umbrella bullet disturbed condition, obtain parachute-opening rule during body 8 unstability, complete test.Above-mentioned test method is the conventional method of this astable body air-drop parachute-opening simulation test device; under the prerequisite of L and D determining this device, this test method is selected to determine, so; test method described herein is not innovation scheme of the present utility model, does not protect.

Above-described embodiment is preferred embodiment of the present utility model; it is not the restriction to technical solutions of the utility model; as long as without the technical scheme that creative work can realize on the basis of above-described embodiment, all should be considered as falling within the scope of the rights protection of the utility model patent.

Claims (4)

1. an astable body air-drop parachute-opening simulation test device, it is characterized in that: comprise body, release platform, throw in fixator and adjusting rope, the rear end of described body is provided with umbrella storehouse, the stage casing of described body is installed on below described release platform by described input fixator, position below described release platform between described input fixator and described umbrella storehouse is provided with fixed block, one end of described adjusting rope is connected with described fixed block, be connected with described body by rope pin after the other end of described adjusting rope is wound around described body, described rope pin is the latch with becket bridle.

2. astable body air-drop parachute-opening simulation test device according to claim 1, is characterized in that: be clearance fit between described rope pin and described body.

3. astable body air-drop parachute-opening simulation test device according to claim 1 and 2, is characterized in that: the coiling length L of described adjusting rope on described body is determined by following formula:

$L=\frac{3r^2{\mathrm{\ω}}_0^2}{4g}$

In formula, r is body radius, and g is acceleration of gravity, ω ₀for needing the body roll angle speed of simulation.

4. astable body air-drop parachute-opening simulation test device according to claim 1 and 2, is characterized in that: the distance D between the barycenter of described fixed block and described body is determined by following formula:

$D=\frac{2J_f{\mathrm{\ω}}_f}{\mathrm{mr}{\mathrm{\ω}}_o}$

In formula, r is body radius, J _ffor the moment of inertia of body pitch orientation, m is Shell body quality, ω ₀for needing the body roll angle speed of simulation, ω _ffor needing the body pitch rate of simulation.