WO2016169760A1 - Dispositif de correction de trajectoire d'un projectile et procede de correction de trajectoire - Google Patents
Dispositif de correction de trajectoire d'un projectile et procede de correction de trajectoire Download PDFInfo
- Publication number
- WO2016169760A1 WO2016169760A1 PCT/EP2016/057400 EP2016057400W WO2016169760A1 WO 2016169760 A1 WO2016169760 A1 WO 2016169760A1 EP 2016057400 W EP2016057400 W EP 2016057400W WO 2016169760 A1 WO2016169760 A1 WO 2016169760A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- projectile
- trajectory
- correction
- sequence
- impeller
- Prior art date
Links
- 238000012937 correction Methods 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 title claims description 12
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 25
- 230000004913 activation Effects 0.000 claims description 10
- 238000004146 energy storage Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 235000015842 Hesperis Nutrition 0.000 abstract description 3
- 235000012633 Iberis amara Nutrition 0.000 abstract description 3
- 230000003213 activating effect Effects 0.000 abstract description 2
- 239000006185 dispersion Substances 0.000 description 15
- 238000004891 communication Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 239000002360 explosive Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
- F42B10/48—Range-reducing, destabilising or braking arrangements, e.g. impact-braking arrangements; Fall-retarding means, e.g. balloons, rockets for braking or fall-retarding
- F42B10/50—Brake flaps, e.g. inflatable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G7/00—Direction control systems for self-propelled missiles
- F41G7/20—Direction control systems for self-propelled missiles based on continuous observation of target position
- F41G7/30—Command link guidance systems
-
- 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
- F42B10/60—Steering arrangements
- F42B10/66—Steering by varying intensity or direction of thrust
-
- 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
- F42B10/60—Steering arrangements
- F42B10/66—Steering by varying intensity or direction of thrust
- F42B10/661—Steering by varying intensity or direction of thrust using several transversally acting rocket motors, each motor containing an individual propellant charge, e.g. solid charge
Definitions
- the present invention is in the field of artillery rockets and relates to a device for correcting the trajectory of a projectile.
- the invention also relates to a method for correcting the trajectory of a projectile.
- the invention is described with a rocket ground-ground, that is to say a rocket launched from the ground and whose position of the impact is on the ground, but it can be applied from the same way to an air-ground rocket, launched from an aircraft, or a sea-ground, sea-sea or sea-sea rocket, launched from or to a ship. More generally, the invention applies to any non-guided projectile.
- An artillery rocket is propelled by means of a thruster.
- developments in rocket propellents have significantly increased their range. Indeed, thanks to a new motorization, that is to say by means of a contribution of more energy at the level of the engines, the range of a rocket could be multiplied by two, making it pass approximately from 20 km to 40 km.
- a rocket being a non-guided projectile, there are dispersions on impact. In other words, when launching the rocket, a nominal trajectory (and therefore desired) is planned. But in practice, the actual trajectory of the rocket differs from the nominal trajectory. This results in dispersion on impact, that is, the impact of the rocket is not the impact initially desired.
- the rocket has an explosive head, a dispersion on impact can cause many collateral damage. And this impact dispersion is even more important than the rocket range is.
- the aim of the invention is to overcome all or some of the problems mentioned above by proposing a device for correcting the trajectory by application to the projectile on the one hand of a succession of discrete corrections and, on the other hand, the deployment of an aerodynamic brake during its trajectory, after finding at the beginning of the trajectory of a difference between the nominal trajectory and the real trajectory of the projectile.
- the subject of the invention is a device for correcting a real trajectory of a projectile intended to travel a nominal trajectory, characterized in that it comprises:
- An impeller positioned on the projectile and intended to provide a lateral correction to the actual trajectory of the projectile
- An aerodynamic brake positioned on the projectile and intended to provide an axial correction to the actual trajectory of the projectile
- the device comprises a modular block and the modular block may comprise the trajectory correction means and the impeller.
- the launch module comprises the actual trajectory measuring means, the calculation means and the transmission means.
- the projectile consisting of a head and a thruster configured to be removably attached to one another, the modular block is positioned between the head and the thruster.
- the aerodynamic brake is positioned on the thruster.
- the modular block further comprises the aerodynamic brake.
- the correction means comprises:
- An information storage means for recording the sequence of at least one correction
- a device for determining the roll position of the projectile • an activation unit for the impeller and the aerodynamic brake.
- the invention also relates to a method for correcting a real trajectory of a projectile intended to travel a nominal trajectory, implementing the correction device, comprising the following successive steps:
- the real trajectory of the projectile comprising a first phase during which the correction means is able to communicate with the transmission means and a second phase during which the correction means is autonomous, the measurement of the real trajectory of the projectile, the determination of the sequence of at least one correction and the transmission of the sequence to the correction means are made during the first phase, and the activation of the impeller and the aerodynamic brake is done during the second phase.
- the correction provided by the impeller is discrete.
- the correction provided by the aerodynamic brake is discrete.
- FIG. 1 schematically represents a condition in which the invention can be implemented
- FIG. 2 diagrammatically represents a first embodiment of the device according to the invention
- FIG. 3 schematically represents a launch module from which the projectile can be launched
- FIGS. 4 and 5 schematically represent a projectile comprising a correction device according to the invention, according to a second and a third embodiment
- FIG. 6 schematically represents a correction means of the correction device according to the invention
- FIG. 7 illustrates the steps of the method of correcting a real trajectory of a projectile intended to travel a nominal trajectory, according to the invention
- FIG. 8 is a schematic representation of a nominal trajectory and a real trajectory of a projectile.
- FIG 1 schematically shows a condition in which the invention can be implemented.
- a rocket is propelled from a launcher 10 which most often consists of a cylindrical hollow tube.
- the launcher 10 is positioned on the shoulder of a man.
- the launcher can also be positioned on a stabilized truck or not, or on a fixed carriage on a ship.
- the conditions under which the propulsion of such a projectile is made are a source of dispersion in the trajectory of the projectile. It is easily understood that from a support such as a man not completely immobile or a non-stabilized vehicle, it will be difficult to obtain a real trajectory that is the desired nominal trajectory since the positioning of the projectile deviations can have place from the launch.
- the aerological conditions are also a source of dispersion in the trajectory of the projectile.
- the trajectory of the projectile is also sensitive to variations in pressure, temperature, local turbulence, particularly related to the wind. These external conditions are difficult to control and generate a dispersion at the impact of the projectile.
- the rotor of the helicopter will disrupt the trajectory of the rocket at the beginning of the launch phase.
- propellant characteristics can also play a role in impact dispersions.
- the Probable Error Circle (known by its CEP abbreviation) makes it possible to quantify the contribution of the different sources of dispersion of the projectile. It has been found that the main causes of dispersion, about 80% of the CEP, are concentrated on the first tenth of the trajectory. In other words, the vast majority of dispersions in the trajectory of the projectile originate from the launching of the projectile and the beginning of the firing phase. In order to correspond to the desired nominal trajectory, any real trajectory must therefore potentially be corrected, radially and / or axially.
- FIG. 2 diagrammatically represents a first embodiment of a device 1 1 according to the invention.
- a projectile 12 is intended to travel a nominal trajectory.
- the correction device 1 1 of a real trajectory according to the invention comprises an impeller 13 positioned on the projectile 12 and intended to provide a lateral correction to the actual trajectory of the projectile 12. It comprises an aerodynamic brake 14 positioned on the projectile 12 and intended to provide an axial correction to the actual trajectory of the projectile.
- the correction device 1 1 comprises a trajectory correction means 15 embarked on the projectile 12, able to activate the impeller 13 and the aerodynamic brake 14. More precisely, the trajectory correction means 15 is a means for controlling the devices trajectory correction.
- the correction means 15 is able to drive the impeller 13 and trigger the aerodynamic brake 14.
- the correction device 1 1 comprises a means of measurement 1 6 of the actual trajectory of the projectile 12, for determining a deviation between the trajectory real and the nominal trajectory.
- the correction device 11 comprises a calculation means 17 intended to determine a sequence of at least one correction. according to the deviometry.
- the correction device 1 1 comprises a transmission means 18 of the sequence of the calculation means 17 towards the trajectory correction means 15.
- the correction device 1 1 may comprise a modular block
- the modular block 19 and the modular block 19 may comprise the trajectory correction means 15 and the impeller 13.
- FIG. 3 schematically shows a launch module 20 from which the projectile 12 can be launched.
- the launch module
- the 20 may comprise the measurement means 1 6 of the real trajectory, the calculation means 17 and the transmission means 18.
- Figures 4 and 5 show schematically the projectile 12 comprising a correction device 1 1 according to the invention, according to a second and a third embodiments.
- the projectile 12 consists of a head 21 and a thruster 22 configured to be removably attached to one another.
- the modular block 19 can be positioned between the head 21 and the thruster 22. This configuration is particularly advantageous. Indeed, in addition to being compact, it has the advantage of being compatible with existing hardware. It is therefore possible to use a head 21 and a pre-existing thruster 22 and to intercalate between the head 21 and the thruster 22 the modular block 19.
- the aerodynamic brake 14 can be positioned on the thruster 14 or at the level of the head 21.
- the aerodynamic brake 14 can be positioned at any position on the thruster 14. In particular, it can be positioned at the rear of the thruster 14 at the level of the stabilizer.
- the aerodynamic brake 14, once actuated, increases the drag of the projectile 12, which then reduces the distance traveled by the projectile 12.
- the aerodynamic brake 14 will thus allow an axial correction of the trajectory the actual projectile 12.
- the modular block 19 may further comprise the aerodynamic brake 14. In other words, in such a configuration, the impeller 13 and the aerodynamic brake 14 are integrated in the modular block 19.
- FIG. 6 schematically represents a correction means 15 of the correction device 1 1 according to the invention.
- the correction means 15 may comprise an antenna 23 intended to allow communication with the launch module 20, an information storage means 24 intended to record the sequence of at least one correction, an electrical energy storage means 25 for supplying the correction means 15, a stopwatch 26, a roll position determination device 27 of the projectile 12, an activation unit 28 of the impeller 13 and the aerodynamic brake 14.
- the stopwatch 26 allows the measurement the elapsed time and will allow the correction means 15 to determine when to activate the impeller 13 and / or the aerodynamic brake 14.
- the roll position determining device 27 will allow the correction means 15 to accurately determine when to activate a impeller 13.
- the rolling position determining device 27 may be for example a magnetometer or a gyroscopic system.
- FIG. 7 illustrates the steps of the method of correcting a real trajectory of a projectile 12 intended to travel a nominal trajectory, according to the invention.
- the correction method comprises the following successive steps:
- the actual trajectory of the projectile 12 can be split into two phases.
- the actual trajectory of the projectile 12 then comprises a first phase during which the correction means 15 is able to communicate with the transmission means 18 and a second phase during which the correction means 15 is autonomous.
- the measurement of the real trajectory of the projectile 12, the determination of the sequence of at least one correction and the transmission of the sequence to the correction means 15 take place during the first phase.
- the activation of the impeller 13 and the aerodynamic brake 14 is done during the second phase.
- FIG. 8 is a schematic representation of a nominal trajectory 30 and of a real trajectory 31 of a projectile 12. Initiating a projectile firing 12, it is desired that this projectile 12 follow a nominal trajectory 30. For the reasons explained previously, disturbances will generate dispersions in the real trajectory 31 of the projectile. These disturbances occur essentially during the first phase 33 of the trajectory.
- the trajectory correction method is implemented. Firstly, after about 10% of the trajectory, the means for measuring the true trajectory of the projectile 12 determines a difference between the real trajectory 31 and the nominal trajectory of the projectile 12.
- the measuring means 1 6 can be a short-range conventional trajectory radar, since intervening in the first phase 33 of the trajectory, the projectile is still at a short distance from the measuring means 1 6.
- the calculation means 17 determines a sequence of at least one correction according to the differenceometry determined in the previous step.
- the calculation means 17 can therefore determine a sequence of one or more necessary corrections as a function of the deviation.
- the calculation means 17 can be any software specific and using a trajectory with six degrees of freedom.
- the calculation means 17 is implanted on the measuring means 1 6 of the real trajectory 31. But it can also be distinct.
- the transmission means 18 is generally based on the ground (or in the aircraft or even on a ship in the case, respectively, of rocket air-ground or sea-ground) and dialoguing in wired communication with the means of calculation 17.
- the transmission means 18 dialogue with the correction means 15 positioned on the projectile 12 by radio frequency.
- This may be for example a short-range radiofrequency communication transmission means. More generally, it can be any other transmission means allowing the transmission of information between the calculation means 17 and the correction means 15.
- the transmission of information between the transmission means 18 and the projectile 12 is done during the first phase 33 of the trajectory during which the correction means 15 is able to communicate with the transmission means 18, that is to say when the projectile 12 is not yet too far from its module 20.
- This configuration has the advantage of collecting all the computing power (measurement means 1 6, calculation means 17, transmission means 18) and keep it on the ground. In other words, once the projectile 12 fired, the computing power does not start with the projectile 12. It is kept and can be used again for another shot.
- the correction means 15 begins the second phase 34 during which the correction means 15 is autonomous.
- the transmission means 18 has transmitted the correction sequence (s) to the correction means 15 positioned on the projectile 12, the correction means 15 then activates the impeller 13 and the aerodynamic brake 14 according to the sequence transmitted to make the corrections. necessary so that the the actual trajectory of the projectile 12 corresponds to the nominal trajectory initially desired.
- the correction device 11 can comprise several impellers. Each impeller 13 generates by triggering a calibrated lateral thrust. In general, 4 to 10 impellers 13 needed. This choice represents a good compromise between efficiency and embedded mass.
- the triggering of an impeller 13 is determined according to the calculated correction sequence.
- the rolling position determination device 27 of the projectile 12 and the stopwatch 26 will determine when the activation unit 28 will activate the impeller 13. Moreover, for the correct course of the sequence of corrections, it is necessary to ensure the compatibility between the rotation speed of the projectile 12, the tripping time and any dispersion of the tripping.
- Each impeller 13 provides a discrete radial correction to the trajectory of the projectile 12.
- the triggering of the aerodynamic brake 14 is also determined by the sequence of corrections.
- the correction device may comprise a plurality of aerodynamic brakes, but generally only one brake is sufficient. Indeed, the aerodynamic brake 14 provides a discrete axial correction to the trajectory of the projectile 12. It is then sufficient to make sure to have a trajectory whose impact would be further axially than desired and to activate once the aerodynamic brake. 14.
- the projectile 12 follows a corrected real trajectory 35 whose impact corresponds to that of the nominal trajectory 30.
- the correction device 1 1 allows a gain in accuracy of about a factor of 5 to 10. This gain of precision is of paramount importance since the projectile can be provided with a unitary explosive head and any gain in precision can then result in a reduction of collateral damage and / or an improvement in the impact efficiency of the 'armed.
- the correction device according to the invention has many other advantages. Indeed, it is inexpensive, independent of satellite geolocation systems, modular and compatible with existing equipment.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
- Vehicle Body Suspensions (AREA)
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ROA201700846A RO132502B1 (ro) | 2015-04-20 | 2016-04-05 | Procedeu de corectare a traiectoriei unui proiectil |
PL423643A PL231346B1 (pl) | 2015-04-20 | 2016-04-05 | Urządzenie do korygowania trajektorii pocisku rakietowego i sposób korygowania trajektorii |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1553490A FR3035205B1 (fr) | 2015-04-20 | 2015-04-20 | Dispositif de correction de trajectoire d'un projectile et procede de correction de trajectoire |
FR1553490 | 2015-04-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016169760A1 true WO2016169760A1 (fr) | 2016-10-27 |
Family
ID=54291367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2016/057400 WO2016169760A1 (fr) | 2015-04-20 | 2016-04-05 | Dispositif de correction de trajectoire d'un projectile et procede de correction de trajectoire |
Country Status (4)
Country | Link |
---|---|
FR (1) | FR3035205B1 (fr) |
PL (1) | PL231346B1 (fr) |
RO (1) | RO132502B1 (fr) |
WO (1) | WO2016169760A1 (fr) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2543606A1 (de) * | 1975-09-30 | 1977-04-07 | Deutsch Franz Forsch Inst | Verfahren zur steigerung der wirksamen reichweite von geschossen durch impulskorrekturen |
WO1989007744A1 (fr) * | 1988-02-17 | 1989-08-24 | Thomson-Csf | Systeme de correction de la trajectoire d'un projectile |
EP0887613A2 (fr) * | 1997-04-03 | 1998-12-30 | Giat Industries | Procédé de programmation en vol d'un instant de déclenchement d'un élément de projectile, conduite de tir et fusée mettant en oeuvre un tel procédé |
WO2002061363A2 (fr) * | 2001-02-01 | 2002-08-08 | United Defense Lp | Correcteur de trajectoire de projectiles bidimensionnel |
EP1783451A2 (fr) * | 2005-11-03 | 2007-05-09 | Junghans Feinwerktechnik GmbH & Co.KG | Projectile stabilisé par rotation |
-
2015
- 2015-04-20 FR FR1553490A patent/FR3035205B1/fr active Active
-
2016
- 2016-04-05 WO PCT/EP2016/057400 patent/WO2016169760A1/fr active Application Filing
- 2016-04-05 RO ROA201700846A patent/RO132502B1/ro unknown
- 2016-04-05 PL PL423643A patent/PL231346B1/pl unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2543606A1 (de) * | 1975-09-30 | 1977-04-07 | Deutsch Franz Forsch Inst | Verfahren zur steigerung der wirksamen reichweite von geschossen durch impulskorrekturen |
WO1989007744A1 (fr) * | 1988-02-17 | 1989-08-24 | Thomson-Csf | Systeme de correction de la trajectoire d'un projectile |
EP0887613A2 (fr) * | 1997-04-03 | 1998-12-30 | Giat Industries | Procédé de programmation en vol d'un instant de déclenchement d'un élément de projectile, conduite de tir et fusée mettant en oeuvre un tel procédé |
WO2002061363A2 (fr) * | 2001-02-01 | 2002-08-08 | United Defense Lp | Correcteur de trajectoire de projectiles bidimensionnel |
EP1783451A2 (fr) * | 2005-11-03 | 2007-05-09 | Junghans Feinwerktechnik GmbH & Co.KG | Projectile stabilisé par rotation |
Also Published As
Publication number | Publication date |
---|---|
FR3035205B1 (fr) | 2018-10-05 |
PL231346B1 (pl) | 2019-02-28 |
FR3035205A1 (fr) | 2016-10-21 |
RO132502B1 (ro) | 2023-10-30 |
PL423643A1 (pl) | 2018-03-26 |
RO132502A2 (ro) | 2018-04-27 |
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