# US 2018/0023928 A1 · Method and device for providing a dummy target for protecting a vehicle and/or an object from radar-guided seeker heads > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2018/0023928 A1 - Document ID: US20180023928A1 - Status: Published application - Kind: A1 - Application number: 15/695,246 - Filed: 2017-09-05 - Published: 2018-01-25 - Earliest claimed: 2015-03-05 - Assignees: Rheinmetall Waffe Munition GmbH - Applicants: Rheinmetall Waffe Munition GmbH - Inventors: Lukas GRUNDNER; Thomas MACHER - Web page: https://patentgrep.com/patent/US20180023928A1 ## CPC - F41H 11/02: 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}) - F41G 3/04: for dispersing fire from a battery {; for controlling spread of shots; for coordinating fire from spaced weapons} - F41G 7/224: {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)} - F41J 2/00: Reflecting targets, e.g. radar-reflector targets; Active targets transmitting electromagnetic {or acoustic} waves - F41H: ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL - F41G: WEAPON SIGHTS; AIMING (optical aspects thereof G02B) - F41J: TARGETS; TARGET RANGES; BULLET CATCHERS {(targets for shooting or hurling games A63F9/0204)} ## 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. ## Claims ### Claim 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 the disintegration or detonation point of the dummy target in the 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; deploying only the decoys that have the minimum distance between the disintegration or detonation points within the defense radius in the optimized dummy target. ### Claim 2 (depends on 1) 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 the application of the cluster algorithm. ### Claim 3 (depends on 1) The method as claimed in claim 1, wherein recognized clusters of the dummy target are thinned out from an outside inward. ### Claim 4 (depends on 1) The method as claimed in claim 1, wherein the dummy target is ascertained at substantially right angles to the threat or an approach angle of the radar-guided missile relative to the object. ### Claim 5 (depends on 1) 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 the operation time. ### Claim 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 the 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 the 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 the aid of a cluster analysis of the point cloud. ### Claim 7 (depends on 6) The device as claimed in claim 6, wherein the sensor is an ESM system. ### Claim 8 (depends on 6) The device as claimed in claim 6, wherein the decoy launch system is directable or non-directable in azimuth and/or elevation. ### Claim 9 (depends on 6) The device as claimed in claim 6, wherein the decoy launch system comprises one, two or a plurality of launchers. ### Claim 10 (depends on 9) The device as claimed in claim 9, wherein a plurality of launchers incorporated on the object are used.