Method and device for providing a dummy target for protecting a vehicle and/or an object from radar-guided seeker heads

Patent metadata

Field	Value
Publication number	US-10670376-B2
Application number	US-201715695246-A
Country	US
Kind code	B2
Filing date	Sep 5, 2017
Priority date	Mar 5, 2015
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A method and a device for providing a dummy target via decoy chaffs for protecting a vehicle and/or an object from radar-guided missiles. After identification of the radar-guided missile and calculation of a decoy chaff pattern, the decoy chaff pattern is presented in the form of polar coordinates in accordance with the firing of shots, a “cut-off” distance for the determination of a defence radius is then found in these polar coordinates. A minimum distance between the disassembly or detonation points within the defence radius is set. The dummy target is then optimized on the basis of the “cut-off” distance and the minimum distance between the disassembly or detonation points. As a result of this calculation, the only decoy chaffs that are deloyed are those that meet the conditions, i.e. that have a minimum distance between the disassembly or detonation points within the defence radius in the optimized dummy target.

First claim

What is claimed is:

1. A method for providing a dummy target via decoys for protecting a vehicle and/or object from radar-guided missiles, the method comprising:
detecting an attack by a radar-guided missile;
identifying the radar-guided missile;
calculating a decoy pattern in accordance with a firing of shots;
representing the decoy pattern as a point cloud of a disintegration or detonation point of the dummy target in a form of polar co-ordinates;
ascertaining or defining a cut-off distance for determining a defense radius;
defining a minimum distance between the disintegration or detonation points within the defense radius;
optimizing the dummy target based on the cut-off distance and the minimum distance between the disintegration or detonation points; and
deploying only the decoys that have the minimum distance between the disintegration or detonation points within the defense radius in the optimized dummy target.

2. The method as claimed in claim 1 , wherein a cluster recognition of the point cloud having the disintegration or detonation points in the decoy pattern is carried out by a cluster algorithm.

3. The method as claimed in claim 1 , wherein recognized clusters of the dummy target are thinned out from an outside inward.

4. The method as claimed in claim 1 , wherein the dummy target is ascertained at substantially right angles to a threat or an approach angle of the radar-guided missile relative to the object.

5. The method as claimed in claim 1 , wherein at least environmental influences such as course and speed of the object, wind direction, wind speed, speed and approach angle of the radar-guided missile are taken into account at an operation time.

6. A device for providing a dummy target via decoys for protecting a vehicle and/or object from radar-guided missiles, the device comprising:
at least one sensor for identifying a missile after detecting an attack by the missile;
at least one decoy launch system having at least one launcher, the decoy launch system being connected to the sensor directly or via a combat management system; and
a database implemented in the decoy launch system, information about a multiplicity of known missiles being stored in the database,
wherein the decoy launch system in reaction to a knowledge of the missile type, specifies a decoy pattern with disintegration or detonation points of the decoys present in the decoy launch system in a decoy pattern in accordance with a firing of shots after calculation, and
wherein the disintegration or detonation points are represented in a polar co-ordinate system and, in a firing control system of the decoy launch system, a point cloud is optimized with an aid of a cluster analysis of the point cloud.

7. The device as claimed in claim 6 , wherein the sensor is an electronic support measures (ESM) system.

8. The device as claimed in claim 6 , wherein the decoy launch system is directable or non-directable in azimuth and/or elevation.

9. The device as claimed in claim 6 , wherein the decoy launch system comprises one, two or a plurality of launchers.

10. The device as claimed in claim 9 , wherein a plurality of launchers incorporated on the object are used.

Assignees

• Rheinmetall Waffe Munition Gmbh

Inventors

• Grundner Lukas
• Macher Thomas

Classifications

• F41J2/00

  Reflecting targets, e.g. radar-reflector targets; Active targets transmitting electromagnetic {or acoustic} waves · CPC title

• F41H11/02 Primary

  Anti-aircraft or anti-guided missile {or anti-torpedo} defence installations or systems (cartridges or missiles for producing smoke or for dispensing radar chaff or infrared material F42B5/15, F42B12/48, F42B12/70; {informative reference: details of radar or sonar systems G01S7/00; jamming or electronic countermeasures G01S7/38, G01S7/495, H04K3/00}) · CPC title

• F41G7/224

  Deceiving or protecting means (jamming or anti-jamming of radio-wave systems in general G01S7/36, G01S7/38; defense installations in general F41H11/02; chaff dispensers F42B12/70) · CPC title

• F41G3/04

  for dispersing fire from a battery {; for controlling spread of shots; for coordinating fire from spaced weapons} · CPC title

• B63G13/00

  Other offensive or defensive arrangements on vessels; Vessels characterised thereby · CPC title