EP0977305A2 - Elektromagnetisch durchlässiges Verbundfenster für zielverfolgende Über- und Hyperschall-Flugkörper - Google Patents
Elektromagnetisch durchlässiges Verbundfenster für zielverfolgende Über- und Hyperschall-Flugkörper Download PDFInfo
- Publication number
- EP0977305A2 EP0977305A2 EP99112424A EP99112424A EP0977305A2 EP 0977305 A2 EP0977305 A2 EP 0977305A2 EP 99112424 A EP99112424 A EP 99112424A EP 99112424 A EP99112424 A EP 99112424A EP 0977305 A2 EP0977305 A2 EP 0977305A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- window
- layers
- supersonic
- window layers
- hypersonic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/32—Range-reducing or range-increasing arrangements; Fall-retarding means
- F42B10/38—Range-increasing arrangements
- F42B10/42—Streamlined projectiles
- F42B10/46—Streamlined nose cones; Windshields; Radomes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B15/00—Self-propelled projectiles or missiles, e.g. rockets; Guided missiles
- F42B15/34—Protection against overheating or radiation, e.g. heat shields; Additional cooling arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q1/422—Housings not intimately mechanically associated with radiating elements, e.g. radome comprising two or more layers of dielectric material
Definitions
- the invention relates to an electromagnetic permeable window in a targeting supersonic or hypersonic missile.
- Target-tracking supersonic and hypersonic missiles have a seeker head with a viewfinder which responds to electromagnetic radiation and which for example, IR radiation from a target object is detected.
- IR radiation for example, IR radiation from a target object is detected.
- over and Hypersonic speeds of the missile are caused by aerokinetic heating the structure of the missile heated up greatly.
- the viewfinder is protected by a window, which is for the electromagnetic Radiation is permeable.
- Windows made of magnesium fluoride or zinc sulfide are relatively small Thermal conductivity, so that they become very hot in the flight phase, causing the The outside of the window is melting. Furthermore, the viewfinder can "go blind” due to the Own emission of the window.
- infrared-transmissive materials For windows made of brittle-break-prone, infrared-transmissive materials is one greater thickness of the window to accommodate the pressure load favorable. On the other hand however, thinner windows have more favorable properties Thermal shock loads. There is an optimal window thickness for which the through Back pressure and temperature induced tensions of the window are minimal.
- EP 0 599 035 A1 shows a connection arrangement for connecting one Search head covering domes made of relatively brittle, infrared-transmissive material the structure of a missile.
- This connection arrangement contains one over the Edge of the cathedral gripping, holding the cathedral positively and with the structure of the Retaining ring connected to the missile.
- the connection is made without a material connection Connection between cathedral and retaining ring.
- Along the edge of the cathedral is under that Retaining ring provided a groove in which a flexible sealant for sealing is housed between the retaining ring and the cathedral.
- the invention has for its object to a window of the type mentioned improve that it better the loads occurring in the flight phase of the missile withstands.
- the window several has mutually supported, mutually supporting window layers, their choice of materials, Thickness and arrangement of temperature-related mechanical stresses in case of over or Hypersonic flight reduced compared to a completely homogeneous window.
- the window must be a specific one Total thickness to withstand the significant mechanical loads. A temperature gradient occurs across this total thickness of the window. At the The surface and the outer layers of the window become very hot. The further inside Layers of the window lying are initially heated less. With a homogeneous Windows then experience thermal, mechanical stresses: the outer ones Layers expand more thermally than the inner layers The resulting tensions can be reduced through a multi-layer window.
- the lifespan of a window according to the invention can be 10 seconds and more consult.
- Typical mission times of a target-tracking supersonic or hypersonic missile are in the range of 3-8 seconds. So it’s not necessary to provide special protective coverings which cover the window in certain flight phases protect.
- a window is shown, which in a search head of a target-tracking over or Hypersonic missile is inserted.
- the part of the search head shown is rotationally symmetrical.
- the axis of rotation is designated 10.
- the flight direction of the Missile is to the left in FIG. 1.
- the window consists of a front window layer 12 and a rear one Window layer 14, which are blown against each other.
- the front window layer 12 is made of sapphire and is relatively thin.
- the rear window layer 14 consists of Magnesium fluoride and is relatively thick.
- the window is in a version 16.
- the Socket is connected to the structure 18 of the missile. Between version 16 and the structure 18 is an insulation layer 20 made of silicone. Furthermore, the Socket 16 is insulated from structure 18 by an ablation layer 22. The Socket 16 extends over the window with an edge 24.
- the curve 2 shows those occurring in three differently designed windows Maximum voltage applied over the flight duration.
- the curves are mathematical simulated. At the end of the acceleration phase, a very high dynamic pressure acts on the Window that drops again after the acceleration phase. The temperature load of the window rises beyond the acceleration phase.
- the curve 30 shows the basic course of the occurring tensions in a conventional single-layer window.
- Curve 32 shows the course of the voltages occurring in FIG a window with two window layers, which at a temperature of 320 ° C. are blasted against each other.
- the curve 34 shows the course of the emerging Tensions in a window with two window layers, between which there is one Voltage isolation layer is located.
- Curve 32 shows that the tension in a window with two against each other blown window layers made of different materials first on a moderate maximum rises, then falls again and rises again later. Overall, the voltage curve is significantly below the curve for one single-layer, homogeneous windows. Because the window layers are different Have thermal expansion coefficients, the high temperature causes one Shear stress between the window layers. The starting is carried out in such a way that the thermal shear stress between the two window layers then is very small when the stress caused by the dynamic pressure is greatest.
- Curve 34 shows that the stress in a window with two through a sliding layer, e.g. Oil or grease layer separated window layers first again a moderate maximum increases. Then the voltage drops again.
- the Sliding layer causes the window layers with different thermal expansion can slide on each other, creating no shear stress between the Window layers can be built.
- the high temperature during the flight So no significant influence on the voltage occurring in the window.
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fluid Mechanics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Remote Sensing (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
Abstract
Description
- Fig. 1
- ist eine schematische Schnittdarstellung und zeigt den vorderen Teil eines Suchkopfes eines zielsuchenden Flugkörpers.
- Fig. 2
- zeigt den Verlauf der auftretenden Spannungen in drei unterschiedlich ausgeführten Fenstern während der Flugphase.
Claims (5)
- Für elektromagnetische Strahlung durchlässiges Fenster bei einem zielverfolgenden Über- oder Hyperschall-Flugkörper, dadurch gekennzeichnet, daß das Fenster mehrere gemeinsam gehalterte, einander stützende Fensterschichten (12,14) aufweist, deren Materialwahl, Dicke und Anordnung temperaturbedingte mechanische Spannungen bei Über- oder Hyperschallflug im Vergleich zu einem durchgehend homogenen Fenster reduziert.
- Fenster nach Anspruch 1, dadurch gekennzeichnet, daß die Fensterschichten auf ihren aneinandergrenzenden Oberflächen fest miteinander verbunden sind und aus Materialien mit derart unterschiedlichen thermischen Ausdehnungs-Koeffizienten bestehen, daß sich bei dem während des Über- oder Hyperschallfluges durch das Fenster hindurch auftretenden Temperaturgradienten in den verschiedenen Fensterschichten im wesentlichen gleiche thermische Ausdehnungen ergeben.
- Fenster nach Anspruch 1 oder 2, gekennzeichnet durch Mittel zum Herstellen eines guten Wärmeüberganges zwischen den Fensterschichten.
- Fenster nach Anspruch 3, dadurch gekennzeichnet, daß als Mittel zum Herstellen eines guten Wärmeüberganges die Fensterschichten durch Ansprengen miteinander verbunden sind.
- Fenster nach Anspruch 1, dadurch gekennzechnet, daß zwischen den Fensterschichten (12,14) eine Gleitschicht vorhanden ist, die eine Relativbewegung der Fensterschichten parallel zu ihren aneinandergrenzenden Oberflächen gestattet, so daß die Übertragung der Spannungen zwischen den Fensterschichten (12,14) vermindert wird.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833884A DE19833884C1 (de) | 1998-07-28 | 1998-07-28 | Elektromagnetisch durchlässiges Verbundfenster für zielverfolgende Über- und Hyperschall-Flugkörper |
| DE19833884 | 1998-07-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0977305A2 true EP0977305A2 (de) | 2000-02-02 |
| EP0977305A3 EP0977305A3 (de) | 2002-02-13 |
Family
ID=7875539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99112424A Withdrawn EP0977305A3 (de) | 1998-07-28 | 1999-06-30 | Elektromagnetisch durchlässiges Verbundfenster für zielverfolgende Über- und Hyperschall-Flugkörper |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6273362B1 (de) |
| EP (1) | EP0977305A3 (de) |
| DE (1) | DE19833884C1 (de) |
| IL (1) | IL130997A (de) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2189672C1 (ru) * | 2001-06-15 | 2002-09-20 | Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология" | Головной антенный обтекатель ракеты |
| RU2189674C1 (ru) * | 2001-09-24 | 2002-09-20 | Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология" | Антенный обтекатель |
| RU2189673C1 (ru) * | 2001-09-24 | 2002-09-20 | Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология" | Антенный обтекатель |
| RU2447549C1 (ru) * | 2011-01-25 | 2012-04-10 | Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология" | Антенный обтекатель |
| CN109606617A (zh) * | 2018-11-28 | 2019-04-12 | 天津津航技术物理研究所 | 一种超声速飞行器可见光窗口组件 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6565036B1 (en) * | 2001-04-12 | 2003-05-20 | The United States Of America As Represented By The Secretary Of The Army | Technique for improving accuracy of high speed projectiles |
| DE102004044203B4 (de) * | 2004-09-13 | 2006-12-07 | Diehl Bgt Defence Gmbh & Co. Kg | Materialverbundfenster |
| RU2459325C1 (ru) * | 2010-12-08 | 2012-08-20 | Открытое акционерное общество "Обнинское научно-производственное предприятие "Технология" (ОАО "ОНПП "Технология") | Головной обтекатель ракеты |
| US11513072B2 (en) | 2021-03-12 | 2022-11-29 | Raytheon Company | Ablation sensor with optical measurement |
| US11880018B2 (en) * | 2021-03-12 | 2024-01-23 | Raytheon Company | Optical window with abrasion tolerance |
| US12491700B2 (en) | 2022-03-11 | 2025-12-09 | Textron Systems Corporation | Shielded multi-layer ablative/insulative material for hypersonic flight and similar applications |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0599035A1 (de) | 1992-10-20 | 1994-06-01 | Bodenseewerk Gerätetechnik GmbH | Verbindungsanordnung zum Verbinden eines einen Suchkopf abdeckenden Domes mit der Struktur eines Flugkörpers |
| DE3715085A1 (de) | 1986-05-08 | 1996-05-02 | British Aerospace | Flugkörper-Spitzenverkleidungsaufbau |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3356549A (en) * | 1964-07-31 | 1967-12-05 | Charles B King | Method and apparatus for bonding a plastics sleeve onto a metallic body |
| US3925783A (en) * | 1974-11-15 | 1975-12-09 | Us Army | Radome heat shield |
| US5457471A (en) * | 1984-09-10 | 1995-10-10 | Hughes Missile Systems Company | Adaptively ablatable radome |
| US4613540A (en) * | 1984-10-09 | 1986-09-23 | Rogers Corporation | Window for broad bandwidth electromagnetic signal transmission, and method of construction thereof |
| US5182155A (en) * | 1991-04-15 | 1993-01-26 | Itt Corporation | Radome structure providing high ballistic protection with low signal loss |
| US5515054A (en) * | 1994-04-20 | 1996-05-07 | Westinghouse Electric Corp. | Dual mode radar transparency and method of fabricating same |
| US5707723A (en) * | 1996-02-16 | 1998-01-13 | Mcdonnell Douglas Technologies, Inc. | Multilayer radome structure and its fabrication |
-
1998
- 1998-07-28 DE DE19833884A patent/DE19833884C1/de not_active Expired - Fee Related
-
1999
- 1999-06-30 EP EP99112424A patent/EP0977305A3/de not_active Withdrawn
- 1999-07-20 IL IL13099799A patent/IL130997A/xx not_active IP Right Cessation
- 1999-07-26 US US09/360,758 patent/US6273362B1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3715085A1 (de) | 1986-05-08 | 1996-05-02 | British Aerospace | Flugkörper-Spitzenverkleidungsaufbau |
| EP0599035A1 (de) | 1992-10-20 | 1994-06-01 | Bodenseewerk Gerätetechnik GmbH | Verbindungsanordnung zum Verbinden eines einen Suchkopf abdeckenden Domes mit der Struktur eines Flugkörpers |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2189672C1 (ru) * | 2001-06-15 | 2002-09-20 | Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология" | Головной антенный обтекатель ракеты |
| RU2189674C1 (ru) * | 2001-09-24 | 2002-09-20 | Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология" | Антенный обтекатель |
| RU2189673C1 (ru) * | 2001-09-24 | 2002-09-20 | Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология" | Антенный обтекатель |
| RU2447549C1 (ru) * | 2011-01-25 | 2012-04-10 | Федеральное государственное унитарное предприятие "Обнинское научно-производственное предприятие "Технология" | Антенный обтекатель |
| CN109606617A (zh) * | 2018-11-28 | 2019-04-12 | 天津津航技术物理研究所 | 一种超声速飞行器可见光窗口组件 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19833884C1 (de) | 1999-12-23 |
| IL130997A (en) | 2003-12-10 |
| IL130997A0 (en) | 2001-01-28 |
| EP0977305A3 (de) | 2002-02-13 |
| US6273362B1 (en) | 2001-08-14 |
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