CN110723297A - Control method for assisting parachute opening of ram parafoil - Google Patents
Control method for assisting parachute opening of ram parafoil Download PDFInfo
- Publication number
- CN110723297A CN110723297A CN201911040919.2A CN201911040919A CN110723297A CN 110723297 A CN110723297 A CN 110723297A CN 201911040919 A CN201911040919 A CN 201911040919A CN 110723297 A CN110723297 A CN 110723297A
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- Prior art keywords
- auxiliary
- cord
- rope
- parachute
- umbrella
- Prior art date
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- IBSREHMXUMOFBB-JFUDTMANSA-N 5u8924t11h Chemical compound O1[C@@H](C)[C@H](O)[C@@H](OC)C[C@@H]1O[C@@H]1[C@@H](OC)C[C@H](O[C@@H]2C(=C/C[C@@H]3C[C@@H](C[C@@]4(O3)C=C[C@H](C)[C@@H](C(C)C)O4)OC(=O)[C@@H]3C=C(C)[C@@H](O)[C@H]4OC\C([C@@]34O)=C/C=C/[C@@H]2C)/C)O[C@H]1C.C1=C[C@H](C)[C@@H]([C@@H](C)CC)O[C@]11O[C@H](C\C=C(C)\[C@@H](O[C@@H]2O[C@@H](C)[C@H](O[C@@H]3O[C@@H](C)[C@H](O)[C@@H](OC)C3)[C@@H](OC)C2)[C@@H](C)\C=C\C=C/2[C@]3([C@H](C(=O)O4)C=C(C)[C@@H](O)[C@H]3OC\2)O)C[C@H]4C1 IBSREHMXUMOFBB-JFUDTMANSA-N 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000009960 carding Methods 0.000 claims abstract description 30
- 239000004744 fabric Substances 0.000 claims description 13
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004080 punching Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D17/00—Parachutes
- B64D17/40—Packs
- B64D17/52—Opening, e.g. manual
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D17/00—Parachutes
- B64D17/62—Deployment
- B64D17/72—Deployment by explosive or inflatable means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D17/00—Parachutes
- B64D17/62—Deployment
- B64D17/74—Sequential deployment of a plurality of canopies
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Tents Or Canopies (AREA)
Abstract
The invention discloses an auxiliary ram parafoil parachute opening control method, which is characterized in that a parachute cord carding belt, an auxiliary cord and a connecting cord fastener are arranged, a cross belt and a cord-threading ring are arranged on the parachute cord carding belt, the parachute cord equally penetrates through the corresponding cord-threading rings, the auxiliary cord is symmetrically overlapped and then sewn through a suture line, two ends of the auxiliary cord are reserved to form overlapped ends, the auxiliary cord rings are reserved at the two ends of the auxiliary cord, the auxiliary cord is connected with the connecting cord fastener through the auxiliary cord rings and connected with the cross belt through the auxiliary cord fastener, all the auxiliary cords are symmetrical about the center of a wing surface, a parachute jacket is unfolded after being air-dropped, the parachute cord is under the tension effect, the parachute cord carding belt is driven to slide downwards through the cord-threading rings, the auxiliary cord is straightened and pulled, the pulling force is torn along the suture line after reaching a certain value, the parachute cord carding belt continues to slide downwards until the tail end of the parachute cord is fully. The method slowly straightens the umbrella rope, reduces umbrella opening impact overload, improves the reliability of umbrella opening program control, has wide applicability, does not change the impact pressing parafoil greatly and has low cost.
Description
Technical Field
The invention belongs to the field of air drop, and particularly relates to an auxiliary control method for unfolding a ram parafoil.
Background
With the development of accurate air-drop systems, the application of ram parafoil is also widespread, which relies on ram air to expand and inflate to fill the canopy and form the wing shape. The upper and lower two-layer canopy of punching press parafoil is the material of little ventilative volume to flexible state is folded and is packed, and the expansion is aerifyd under the condition that has certain speed, but at the expansion in-process, because the characteristics of little ventilative, the instantaneous full area expansion can bring great impact force, so need control the gradual expansion of punching press parafoil, is used for delaying the time that full area parafoil expanded, in order to reduce the parachute-opening impact, promotes the reliability of parachute-opening.
At present, the parachute opening control method of the ram parafoil mainly adopts a closing-in cloth sliding control method, and the method has the following problems: in the gliding process of the sliding cloth, the sliding cloth can generate resistance, and the closing-up of the parafoil can be released only when the tension of the umbrella rope is greater than the downward movement resistance and the gravity of the sliding cloth, but the size design of the closing-up sliding cloth is complex, a large number of tests are required for groping, and the closing-up sliding cloth is obviously impractical when applied to a large parafoil.
Disclosure of Invention
The invention aims to provide an auxiliary control method for opening a stamping parafoil, which slowly straightens an parachute rope, reduces parachute opening impact overload, improves reliability of parachute opening program control, has wide applicability, does not change the stamping parafoil greatly and has low cost.
The technical scheme adopted by the invention is as follows:
an auxiliary ram parafoil parachute opening control method comprises an parachute cord carding belt and a plurality of auxiliary cords, wherein a plurality of connecting cord buckles are arranged on the airfoil surface of a ram parafoil, the parachute cord carding belt is enclosed into a square shape, a cross belt is arranged in the middle of the parachute cord carding belt, cord rings are distributed at four corners of the parachute cord carding belt, the parachute cords of the ram parafoil are divided into four groups and respectively penetrate through the corresponding cord rings, the auxiliary cords are symmetrically overlapped and then sewn through stitches, two ends of each auxiliary cord are reserved for the auxiliary cord rings, the auxiliary cord buckles are reserved at the ends of the auxiliary cords, the auxiliary cords are connected with the connecting cord buckles through the auxiliary cord rings and connected with the cross belt through the auxiliary cord buckles, and all the auxiliary cords are symmetrical about the center of the airfoil surface; during packaging, the side air chambers and the middle air chambers are stacked together, the auxiliary ropes and the umbrella rope carding belts are packaged and folded at the lower ends of the wing surfaces, after air drop, ram air flows to the side air chambers along the middle air chambers, the umbrella cloth is unfolded, the umbrella ropes are under tension, the umbrella rope carding belts are driven to slide downwards through the rope threading rings, the auxiliary ropes are straightened and pulled, the pulling force is torn along a suture line after reaching a certain value, the umbrella rope carding belts continue to slide downwards until the tail ends of the umbrella ropes, and the umbrella cloth is inflated and fully stretched.
Furthermore, the auxiliary ropes are connected near the umbrella rope buckles, and the auxiliary rope rings at the two ends of the auxiliary ropes are distributed along the chord direction of the airfoil.
Further, in the chord direction of the same airfoil, the number of the auxiliary ropes is 50% of the number of the umbrella ropes.
Further, auxiliary cords are attached at least near the middle air cell and at the side-most air cells.
Further, the length of the umbrella rope carding belt is 15% of the chord-wise length of the unfolded umbrella cloth.
Furthermore, the auxiliary rope adopts an umbrella rope.
Further, the suture is a zigzag suture.
Further, the rope threading ring adopts a smooth circular ring.
The invention has the beneficial effects that:
the method can prevent the umbrella rope carding belt from rapidly sliding downwards, restrain and release the canopy unfolding area of the ram parafoil by using the auxiliary rope with specific strength, slowly straighten the parachute rope, prolong the parachute opening and inflation time of the ram parafoil, reduce parachute opening impact overload, enable the air chamber to be orderly unfolded and inflated, and improve the reliability of parachute opening program control; the tearing strength of the auxiliary rope can be designed and known in advance, so that the method has wide applicability for controlling the prediction of the full parachute opening force of the parachute opening inflation of different ram parafoil, meets the requirement of practical performance, and has better application prospect; the pressing parafoil is not changed greatly only by arranging the parachute line carding belt, the auxiliary rope and the connecting rope buckle, the cost is low, and the installation is convenient.
Drawings
FIG. 1 is a schematic view of a ram parafoil prior to deployment in an embodiment of the invention.
Fig. 2 is a schematic diagram of a ram-air parachute according to an embodiment of the present invention after being deployed.
Fig. 3 is a schematic view of an auxiliary cord and a parachute cord combing tape in an embodiment of the present invention.
In the figure: 1-umbrella rope; 2-umbrella rope carding belt; 3-auxiliary ropes; 4-side air chamber; 5-an intermediate air chamber; 6-cross-strips; 7-a stringing ring.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1 to 3, an auxiliary ram parafoil parachute opening control method comprises the steps of arranging a parachute cord carding belt 2 and a plurality of auxiliary cords 3, arranging a plurality of connecting cord buckles on the airfoil surface of a ram parafoil, arranging a cross belt 6 in the middle of the parachute cord carding belt 2 in a square shape, distributing cord rings 7 at four corners, dividing parachute cords 1 of the ram parafoil into four groups, respectively penetrating through the corresponding cord rings 7, sewing the auxiliary cords 3 after symmetrical superposition, reserving two ends to form superposed ends, reserving the auxiliary cord rings at two ends of the auxiliary cords 3, reserving the auxiliary cord buckles at the ends, connecting the auxiliary cords 3 with the connecting cord buckles through the auxiliary cord rings, connecting the auxiliary cord buckles with the cross belt 6, and symmetrically arranging all the auxiliary cords 3 with respect to the airfoil center; during packaging, the side air chambers 4 and the middle air chamber 5 are stacked together, the auxiliary rope 3 and the umbrella rope carding belt 2 are packaged and folded at the lower end of the wing surface, after air drop, ram air flows to the side air chambers 4 along the middle air chamber 5, the umbrella cloth is unfolded, the umbrella rope 1 is under the tension effect, the rope threading ring 7 drives the umbrella rope carding belt 2 to slide downwards, the auxiliary rope 3 is stretched and pulled straightly, the pulling force is torn along a suture line after reaching a certain value, the umbrella rope carding belt 2 continues to slide downwards until the tail end of the umbrella rope 1, and the umbrella cloth is fully inflated.
The method can prevent the umbrella rope carding belt 2 from rapidly sliding downwards, restrain and release the canopy unfolding area of the ram parafoil by using the auxiliary rope 3 with specific strength, slowly straighten the parachute rope 1, prolong the parachute opening and inflation time of the ram parafoil, reduce parachute opening impact overload, enable the air chamber to be orderly unfolded and inflated, and improve the reliability of parachute opening program control; the tearing strength of the auxiliary rope 3 can be designed and known in advance, so that the prediction of the full parachute opening force for controlling parachute opening inflation of different ram parafoil is wide in applicability, meets the practical performance requirement, and has a good application prospect; only need set up parachute cord and comb area 2, supplementary rope 3 and connect the cable loop, it is little to change punching parafoil, with low costs, simple to operate.
As shown in fig. 2, in the present embodiment, the auxiliary rope 3 is connected near the parachute line buckle and the auxiliary rope rings at the two ends of the auxiliary rope 3 are distributed along the chord direction of the airfoil, and in the same airfoil chord direction, the number of the auxiliary rope 3 is 50% of the number of the parachute ropes 1, which can be adjusted according to the actual effect.
As shown in fig. 2, in the present embodiment, the auxiliary ropes 3 are connected at least near the middle air chamber 5 and at the most lateral air chamber 4, and a plurality of auxiliary ropes 3 may be provided therebetween.
In this embodiment, the length of the umbrella cord carding belt 2 is 15% of the chord length of the unfolded umbrella coat, which can be adjusted according to the actual effect; the auxiliary rope 3 adopts an umbrella rope, so that the strength is high; the stitches are saw-tooth stitches which are convenient to tear in sequence; the rope threading ring 7 adopts a smooth circular ring, so that the umbrella rope 1 is prevented from being scratched.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (8)
1. An auxiliary ram parafoil opening control method is characterized by comprising the following steps: the method comprises the following steps that an umbrella rope carding belt and a plurality of auxiliary ropes are arranged, a plurality of connecting rope buckles are arranged on the airfoil surface of the ram parafoil, the umbrella rope carding belt is enclosed into a square shape, a cross belt is arranged in the middle of the umbrella rope carding belt, rope-threading rings are distributed at four corners of the umbrella rope carding belt, the umbrella ropes of the ram parafoil are divided into four groups and respectively penetrate through the corresponding rope-threading rings, the auxiliary ropes are symmetrically overlapped and then sewn through stitches, two ends of each auxiliary rope are reserved, auxiliary rope buckles are reserved at the ends of the auxiliary ropes, the auxiliary ropes are connected with the connecting rope buckles through the auxiliary rope rings and are connected with the cross belt through the auxiliary rope buckles, and all the auxiliary ropes are symmetrical about; during packaging, the side air chambers and the middle air chambers are stacked together, the auxiliary ropes and the umbrella rope carding belts are packaged and folded at the lower ends of the wing surfaces, after air drop, ram air flows to the side air chambers along the middle air chambers, the umbrella cloth is unfolded, the umbrella ropes are under tension, the umbrella rope carding belts are driven to slide downwards through the rope threading rings, the auxiliary ropes are straightened and pulled, the pulling force is torn along a suture line after reaching a certain value, the umbrella rope carding belts continue to slide downwards until the tail ends of the umbrella ropes, and the umbrella cloth is inflated and fully stretched.
2. The method for controlling the parachute opening of an auxiliary ram parachute as recited in claim 1, further comprising: the auxiliary rope is connected near the umbrella rope buckle, and the auxiliary rope rings at the two ends of the auxiliary rope are distributed along the chord direction of the airfoil.
3. The method for controlling the parachute opening of an auxiliary ram parachute as recited in claim 2, further comprising: in the chord direction of the same airfoil, the number of the auxiliary ropes is 50 percent of the number of the umbrella ropes.
4. The method for controlling the parachute opening of an auxiliary ram parachute as recited in claim 1, further comprising: the auxiliary ropes are connected at least near the middle air chamber and on the most lateral air chamber.
5. The method for controlling the parachute opening of an auxiliary ram parachute as recited in claim 1, further comprising: the length of the umbrella rope carding belt is 15 percent of the chord-wise length of the unfolded umbrella coat.
6. The method for controlling the parachute opening of an auxiliary ram parachute as recited in claim 1, further comprising: the auxiliary rope is an umbrella rope.
7. The method for controlling the parachute opening of an auxiliary ram parachute as recited in claim 1, further comprising: the suture adopts a sawtooth suture.
8. The method for controlling the parachute opening of an auxiliary ram parachute as recited in claim 1, further comprising: the rope threading ring adopts a smooth circular ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911040919.2A CN110723297A (en) | 2019-10-29 | 2019-10-29 | Control method for assisting parachute opening of ram parafoil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911040919.2A CN110723297A (en) | 2019-10-29 | 2019-10-29 | Control method for assisting parachute opening of ram parafoil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110723297A true CN110723297A (en) | 2020-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911040919.2A Pending CN110723297A (en) | 2019-10-29 | 2019-10-29 | Control method for assisting parachute opening of ram parafoil |
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| Country | Link |
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| CN (1) | CN110723297A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277089A (en) * | 2021-06-28 | 2021-08-20 | 湖北文理学院 | Device for changing flight angle of attack of parafoil |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4664342A (en) * | 1984-11-19 | 1987-05-12 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Methods of deploying parachutes |
| US6220547B1 (en) * | 1999-06-08 | 2001-04-24 | Pioneer Aerospace Corporation | Large scale parafoil apparatus with an energy attenuator for controlling initial deployment |
| CN202911949U (en) * | 2012-10-31 | 2013-05-01 | 航宇救生装备有限公司 | Parafoil |
| CN203567939U (en) * | 2013-11-29 | 2014-04-30 | 航宇救生装备有限公司 | Porous necking-in slide cloth used for large parafoil |
| CN107757923A (en) * | 2017-10-27 | 2018-03-06 | 航宇救生装备有限公司 | Ram air parachute parachute-opening control method |
| CN107826256A (en) * | 2017-10-27 | 2018-03-23 | 航宇救生装备有限公司 | Reduce the method for ram air parachute parachute-opening shock |
| CN109250122A (en) * | 2018-10-19 | 2019-01-22 | 航宇救生装备有限公司 | A kind of traction parachute-opening inflatable ram air parachute |
-
2019
- 2019-10-29 CN CN201911040919.2A patent/CN110723297A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4664342A (en) * | 1984-11-19 | 1987-05-12 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Methods of deploying parachutes |
| US6220547B1 (en) * | 1999-06-08 | 2001-04-24 | Pioneer Aerospace Corporation | Large scale parafoil apparatus with an energy attenuator for controlling initial deployment |
| CN202911949U (en) * | 2012-10-31 | 2013-05-01 | 航宇救生装备有限公司 | Parafoil |
| CN203567939U (en) * | 2013-11-29 | 2014-04-30 | 航宇救生装备有限公司 | Porous necking-in slide cloth used for large parafoil |
| CN107757923A (en) * | 2017-10-27 | 2018-03-06 | 航宇救生装备有限公司 | Ram air parachute parachute-opening control method |
| CN107826256A (en) * | 2017-10-27 | 2018-03-23 | 航宇救生装备有限公司 | Reduce the method for ram air parachute parachute-opening shock |
| CN109250122A (en) * | 2018-10-19 | 2019-01-22 | 航宇救生装备有限公司 | A kind of traction parachute-opening inflatable ram air parachute |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113277089A (en) * | 2021-06-28 | 2021-08-20 | 湖北文理学院 | Device for changing flight angle of attack of parafoil |
| CN113277089B (en) * | 2021-06-28 | 2022-08-05 | 湖北文理学院 | Device for changing flight angle of attack of parafoil |
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Application publication date: 20200124 |