EP0939881B1 - Method for correcting the trajectory of a projectile of a gun, a mortar or a rocket launcher or the like - Google Patents

Method for correcting the trajectory of a projectile of a gun, a mortar or a rocket launcher or the like Download PDF

Info

Publication number
EP0939881B1
EP0939881B1 EP97927216A EP97927216A EP0939881B1 EP 0939881 B1 EP0939881 B1 EP 0939881B1 EP 97927216 A EP97927216 A EP 97927216A EP 97927216 A EP97927216 A EP 97927216A EP 0939881 B1 EP0939881 B1 EP 0939881B1
Authority
EP
European Patent Office
Prior art keywords
projectile
indicator
electronic unit
spotting
set forth
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.)
Expired - Lifetime
Application number
EP97927216A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0939881A1 (en
Inventor
Pekka Pylkkänen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0939881A1 publication Critical patent/EP0939881A1/en
Application granted granted Critical
Publication of EP0939881B1 publication Critical patent/EP0939881B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G3/00—Aiming or laying means
    • F41G3/14—Indirect aiming means
    • F41G3/142—Indirect aiming means based on observation of a first shoot; using a simulated shoot

Definitions

  • the present invention relates to a method for correcting the trajectory of a projectile of a gun, a mortar or a rocket launcher or the like firearm, said method comprising a step of determining the site coordinates of a firing position and a recognized target on a map, and of using a compass, an azimuth gyro or some other method for determining the bearing from the firing position to the target at the accuracy of a few degrees. More specifically, the invention is about the speedy adjustment of bearing and elevation of the barrel of a gun for high-precision firing.
  • the projectile When firing a gun, a mortar and a rocket launcher or the like firearm to far-away targets, the projectile will reach a very high altitude at the highest point of its trajectory, even an altitude of up to 5 - 15 km.
  • the climatic disturbances have a major effect on target-hitting precision.
  • the force and direction of wind may vary at various altitudes.
  • the air density and atmospheric humidity may vary substantially at various altitudes.
  • This information is then utilized for calculating a corrected trajectory by means of a so-called layer formula, wherein the trajectory is calculated in increments in various atmospheric layers.
  • This provides an improvement in target-hitting precision, but such prior known method involves several drawbacks.
  • the ascent of a weather sonde to a sufficient altitude may take up to 40 minutes and, thus, the method is slow and not suitable for modern high-speed warfare.
  • the method involves two inaccuracy factors. First of all, the weather probe is exposed to winds and, hence, during the ascent, it may drift even far away from the location of the projectile trajectory. Secondly, the calculation effected with the layer formula only provides an approximation for the required correction.
  • An object of the invention is to provide an improved method for determining the required correction for displacement and elevation of the barrel or tube of a gun, a mortar or a rocket launcher by simultaneously accounting for all firing-related disturbance factors so as to achieve a target-hitting precision better than before. Another object of the invention is to speed up the calculation of required correction and the transfer to a new firing position.
  • a gun 1 has been driven to a firing position 2 which has fixed its position accurately e.g. by means of spotting signals received thereby from a GPS-system 6, 7.
  • the reconnaissance has cleared the site coordinates of a target 4 on the map at an accuracy which is sufficient for a projectile finding said coordinates to destroy the target 4.
  • the indicator projectile 5 is fitted with an electronic package 8, which contains
  • the corrections for elevation and bearing can be made easily on the basis of a difference between the coordinates of a hypothetical location P 1 and a real location P 2 of the indicator projectile.
  • the indicator projectile 5 is fired sufficiently off the target 4 not to be observed in the target area, the indicator projectile must nevertheless travel in substantially the same weather conditions over substantially the same distance as the actual live projectile to the target 4. Thus, all firing-related disturbance factors can be taken into consideration at the same time. This applies also to the temperature of gunpowder, which will be automatically accounted for as the indicator projectile corresponding to the actual explosive projectile in terms of its dimensions and weight is stored at the same temperature as live ammunition.
  • the spotting system may be a spotting system based on fixed ground stations or a GPS-system or a differential GPS-system, wherein the inaccuracy intentionally added in satellite spotting 6 is eliminated by means of a ground station 7.
  • GPS-system GPS-system
  • differential GPS-system differential GPS-system
  • the spotting accuracy can be increased according to the invention in such a manner that, in the receiving unit 3 of a firing position, whose site coordinates are precisely known, the spotting is performed simultaneously with the spotting of an indicator projectile by receiving a spotting signal of the GPS-satellites 6 and by comparing the spotting result with the precisely known site coordinates of the firing position 2, 3.
  • This comparison results in the discovery of a position error caused by the fading of system coordinates, whereby a correction equal to said error can be made in the site coordinates received from the indicator projectile 5.
  • Fig. 2a illustrates how the electronic unit 8 containing a transmitter and a receiver can be launched or ejected from the indicator projectile 5 rearwards to a substantially stationary position before the indicator projectile 5 hits the ground.
  • Technology for discovering the proper instant is used e.g. in mid-air exploding ammunition.
  • the indicator projectile 5 or the electronic unit 8 released therefrom can be decelerated with a parachute 9 prior to hitting the ground, as shown in fig. 2b.
  • the release of the electronic unit 8 from the projectile can also be effected on the basis of flying time, in other words the electronic unit has its clock activated during the muzzle acceleration of a projectile and the electronic unit is released after a preset time.
  • the electronic unit 8 can be incorporated also in exploding projectiles so as to receive coordinates from all strikes.
  • the information supplied by the electronic unit 8 may also include a measured flying time, which can be utilized in fire control calculations.
  • the information provided by the electronic unit 8 can also be utilized, such that the received information is used for calculating the corrections necessitated by weather, Coriolis effect, change of gravity (according to latitude), gunpowder temperature and muzzle velocity for conventional fire control calculation.
  • the electronic unit 8 can be made self-destructive after it has transmitted site coordinates for its own location. The purpose of this is to avoid revelation of the applied technology.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
EP97927216A 1996-06-19 1997-06-19 Method for correcting the trajectory of a projectile of a gun, a mortar or a rocket launcher or the like Expired - Lifetime EP0939881B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI962545 1996-06-19
FI962545A FI98957C (fi) 1996-06-19 1996-06-19 Menetelmä tykin, kranaatin- tai raketinheittimen tai vastaavan ammuksen lentoradan korjaamiseksi
PCT/FI1997/000397 WO1997048963A1 (en) 1996-06-19 1997-06-19 Method for correcting the trajectory of a projectile of a gun, a mortar or a rocket launcher or the like

Publications (2)

Publication Number Publication Date
EP0939881A1 EP0939881A1 (en) 1999-09-08
EP0939881B1 true EP0939881B1 (en) 2002-11-27

Family

ID=8546245

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97927216A Expired - Lifetime EP0939881B1 (en) 1996-06-19 1997-06-19 Method for correcting the trajectory of a projectile of a gun, a mortar or a rocket launcher or the like

Country Status (4)

Country Link
EP (1) EP0939881B1 (fi)
DE (1) DE69717488T2 (fi)
FI (1) FI98957C (fi)
WO (1) WO1997048963A1 (fi)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19718947B4 (de) * 1997-05-05 2005-04-28 Rheinmetall W & M Gmbh Pilotgeschoß
US6386879B1 (en) * 2000-03-24 2002-05-14 Cubic Defense Systems, Inc. Precision gunnery simulator system and method
RU2695592C1 (ru) * 2018-12-13 2019-07-24 Акционерное общество "Научно-производственное предприятие "Дельта" Способ коррекции навесной траектории артиллерийского снаряда

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344422A (en) * 1966-09-26 1967-09-26 Avco Corp Miss distance indicator
GB2140538A (en) * 1983-05-17 1984-11-28 Ferranti Plc Projectile guidance system
SE460501B (sv) * 1986-09-17 1989-10-16 Bofors Ab Saett och anordning att foelja en raketprojektil i dess bana
BR9004712A (pt) * 1989-01-24 1991-07-30 Contraves Ag Processo e aparelhagem para melhorar a precisao do tiro
FR2705446B1 (fr) * 1993-05-14 1995-06-23 Thomson Csf Procédé d'amélioration du pointage d'une arme par obus précurseurs et obus correspondant.

Also Published As

Publication number Publication date
DE69717488T2 (de) 2003-07-03
WO1997048963A1 (en) 1997-12-24
FI98957B (fi) 1997-05-30
EP0939881A1 (en) 1999-09-08
FI98957C (fi) 1997-09-10
FI962545A0 (fi) 1996-06-19
DE69717488D1 (de) 2003-01-09

Similar Documents

Publication Publication Date Title
US5647558A (en) Method and apparatus for radial thrust trajectory correction of a ballistic projectile
US6037899A (en) Method for vectoring active or combat projectiles over a defined operative range using a GPS-supported pilot projectile
US4004487A (en) Missile fire-control system and method
US7367525B2 (en) Munition with integrity gated go/no-go decision
US7698983B1 (en) Reconfigurable fire control apparatus and method
US20030089219A1 (en) System and method for disabling time critical targets
GB2212252A (en) Missile defence system.
US3073550A (en) Guidance system for missiles
KR20010021613A (ko) Ｇｐｓ 유도 군수품
RU2584210C1 (ru) Способ стрельбы управляемым снарядом с лазерной полуактивной головкой самонаведения
CN114502465B (zh) 通过脉冲信标和低成本惯性测量单元确定姿态
CN109813177A (zh) 一种间瞄武器模拟训练导调控制与对抗评估方法和系统
RU2663764C1 (ru) Способ стрельбы управляемым снарядом и реализующая его система высокоточного оружия
RU2538509C1 (ru) Способ стрельбы управляемой ракетой
EP0939881B1 (en) Method for correcting the trajectory of a projectile of a gun, a mortar or a rocket launcher or the like
EP0105918A1 (en) GUIDANCE SYSTEM FOR PROJECTILES AT THE END OF THE TRAJECTORY.
RU179821U1 (ru) Автоматизированная система управления наведением и огнем пусковой установки реактивной системы залпового огня (варианты)
WO1996008688A1 (en) System and method for hitting a target in a cluster
RU2674401C2 (ru) Способ стрельбы управляемым артиллерийским снарядом
RU2346232C1 (ru) Высокоточная авиационная бомба, стабилизированная по крену, круглосуточного и всепогодного боевого применения с аппаратурой инерциально-спутникового наведения
RU2253820C2 (ru) Мобильный зенитный ракетный комплекс
US4938115A (en) Arrangement in a flying weapons carrier for combating ground targets
KR102184337B1 (ko) 로켓보조 곡사포탄의 사거리 예측 방법
US8513580B1 (en) Targeting augmentation for short-range munitions
US3741501A (en) Self monitoring strike system

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19990119

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE FI FR GB IT LI SE

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

17Q First examination report despatched

Effective date: 20020301

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FI FR GB IT LI SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM & CO. PATENTANWAELTE

REF Corresponds to:

Ref document number: 69717488

Country of ref document: DE

Date of ref document: 20030109

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030828

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20050512

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20050516

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20050519

Year of fee payment: 9

Ref country code: SE

Payment date: 20050519

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050520

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060619

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060620

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060630

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20060630

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070103

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20060619

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070619

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FI

Payment date: 20100303

Year of fee payment: 14

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110619