EP0348985A2 - Fusée d'allumage pour des projectiles explosifs - Google Patents

Fusée d'allumage pour des projectiles explosifs Download PDF

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Publication number
EP0348985A2
EP0348985A2 EP89111910A EP89111910A EP0348985A2 EP 0348985 A2 EP0348985 A2 EP 0348985A2 EP 89111910 A EP89111910 A EP 89111910A EP 89111910 A EP89111910 A EP 89111910A EP 0348985 A2 EP0348985 A2 EP 0348985A2
Authority
EP
European Patent Office
Prior art keywords
acceleration
projectile
tube
fed
path
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Withdrawn
Application number
EP89111910A
Other languages
German (de)
English (en)
Other versions
EP0348985A3 (fr
Inventor
Friedrich Melchior
Rainer Berthold
Bernd Siedelhofer
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.)
ABB AG Germany
ABB AB
Original Assignee
Asea Brown Boveri AG Germany
Asea Brown Boveri AB
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 Asea Brown Boveri AG Germany, Asea Brown Boveri AB filed Critical Asea Brown Boveri AG Germany
Publication of EP0348985A2 publication Critical patent/EP0348985A2/fr
Publication of EP0348985A3 publication Critical patent/EP0348985A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/06—Electric fuzes with time delay by electric circuitry
    • F42C11/065—Programmable electronic delay initiators in projectiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/40—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected electrically

Definitions

  • the invention relates to a method according to the preamble of claim 1, and a circuit arrangement for performing the method.
  • the ignition and explosion of a projectile after firing must be set so that the projectile explodes as precisely as possible at the predetermined point.
  • the muzzle velocity is determined in different ways:
  • This is disadvantageous because the positioning of the sensors (transducers) must be carried out extremely precisely and error signals can be generated by pipe erosion. The measurement inaccuracies ultimately result in a spread of the explosion site in the target area.
  • the object of the invention is to provide a method of the type mentioned, in which the inaccuracies are reduced even further. Furthermore, a circuit arrangement for performing the method is to be specified.
  • the propellant gases build up a pressure inside the pipe, which gives the floor an acceleration that increases from 0 to the maximum value and then decreases.
  • acceleration inside and outside the tube have extremely different sizes and also different signs
  • two separate accelerometers are used according to the invention and their signals are summed electronically.
  • One accelerometer only supplies the positive values of the acceleration during the so-called internal ballistic acceleration phase; the other accelerometer only provides negative voltage values during the external ballistic delay.
  • Both signals must of course have the same sensitivity; this means that suitable amplifiers or attenuators must be connected upstream or provided.
  • the path covered is evaluated by comparing the voltage values or signals generated during the second phase with a threshold value by a comparator. As soon as the added signals reach this threshold value, an ignition pulse is emitted.
  • the path can be determined exactly without having to particularly measure the otherwise important muzzle velocity value.
  • auxiliary variables which are used for path measurement are not included in the path calculation. Triangulation, way-time Conversion, v o measurement or radar measurements can thus be omitted.
  • the outer shape of the projectile is retained and not changed because all elements for the acceleration measurement are housed inside the projectile. This does not change the drag coefficient as the resistance coefficient of the projectile. All external ballistic influences in the direction of flight on the projectile during the flight phase, which influence the negative acceleration, are included in the path determination with the double integration, so that the projectile can always detonate in the target area.
  • a projectile that is fired from a gun is accelerated within the gun barrel.
  • the speed curve is shown in Fig. 1b.
  • the velocity of the projectile increases from 0 to a maximum value v o , which is the velocity in the area of the mouth of the tube. Then the speed drops because the projectile flies without propulsion and is slowed down by the air friction.
  • the speed is calculated according to the acceleration.
  • the muzzle velocity is: t o is the time at which the projectile leaves the pipe mouth.
  • the detonator is set before firing so that the projectile explodes after a certain flight duration that corresponds to a certain flight path.
  • the time from leaving the mouth to the explosion must be set accordingly.
  • the muzzle velocity can fluctuate, the location of the projectile detonates. This spread can be minimized by correcting the duration by taking the muzzle velocity v o into account.
  • the acceleration of the projectile in the tube is detected and integrated by means of an acceleration element located in the projectile, the value v o being calculated within the projectile (see FIG. 2 below).
  • FIG. 2 shows in a block diagram a circuit arrangement for determining the ignition timing of a projectile.
  • the accelerometer 20 measures the positive acceleration, ie the inside ballistic acceleration (in the tube), and the accelerometer 21 the negative acceleration, that is the outside ballistic acceleration (outside the tube).
  • Both measured values which differ by a factor of 10 3 are matched to one another by means of amplifiers 22 and 23, so that they can be brought together at point 24 and fed to an evaluator 25 at whose output the signal b (t) is present.
  • This signal is applied to a first integrator 26, which calculates the speed from this.
  • the muzzle velocity v o is obtained , ie the velocity that the bullet has at the moment it exits the tube. With this speed, the time period previously set in the above-mentioned detonator from the firing point to the target can be corrected.
  • the signal v o would be fed via the dashed line 26 a to a computer 27 in which - starting from a nominal muzzle velocity - a nominal period of time corresponding to a nominal distance has been programmed for the timer.
  • the nominal muzzle velocity is compared with the actual muzzle velocity and the ignition timing is corrected so that the ignition signals Z are emitted by the computer 27 at the point in time at which the projectile is in the target.
  • a signal S is formed on the output side for the path that the projectile travels.
  • This path signal is fed to a comparator 29, to which a path setpoint, which is provided by a path setpoint generator 30, is also fed.
  • a path setpoint which is provided by a path setpoint generator 30, is also fed.
  • an ignition pulse Z is generated which detonates the projectile.
  • Sensors can simply be used as acceleration measuring elements, since no value has to be placed on the linearity or reproducibility of the measured values after the first acceleration phase in the tube. For example, an element can be used which deforms elastically or plastically under the influence of an inert mass; the deformation is then a measure of the acceleration.
  • upset meters which are used in gas pressure measurements in pipes.
  • an elastically deformable body is attached to the rear end of a space arranged in the floor, the front end of which has a small mass; when the projectile is accelerated, the deformable body is compressed in accordance with the acceleration and a measure of the acceleration can then be derived from this deformation.
  • Precise accelerometers are not required; in particular, they do not have to provide reproducible values because measurements are only carried out once.
  • the integration time for the positive acceleration is approx. 5 msec, since there is only a positive acceleration in the pipe. Therefore, the measurement of the positive acceleration must not take longer than this 5 msec so that any errors that occur later when evaluating the negative acceleration no longer have any influence. In addition, since the majority of the speed increase occurs at the maximum acceleration, an accelerometer that is not particularly linear is also sufficient.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
EP89111910A 1988-06-30 1989-06-30 Fusée d'allumage pour des projectiles explosifs Withdrawn EP0348985A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3822072 1988-06-30
DE19883822072 DE3822072A1 (de) 1988-06-30 1988-06-30 Zuendeinrichtung fuer sprenggeschosse

Publications (2)

Publication Number Publication Date
EP0348985A2 true EP0348985A2 (fr) 1990-01-03
EP0348985A3 EP0348985A3 (fr) 1990-03-07

Family

ID=6357614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89111910A Withdrawn EP0348985A3 (fr) 1988-06-30 1989-06-30 Fusée d'allumage pour des projectiles explosifs

Country Status (2)

Country Link
EP (1) EP0348985A3 (fr)
DE (1) DE3822072A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0601983A3 (fr) * 1992-11-12 1994-08-31 Bofors Ab
EP0661516A1 (fr) * 1993-12-30 1995-07-05 Alliant Techsystems Inc. Fusée magnétique multifunctionnelle
FR2899679A1 (fr) * 2006-04-07 2007-10-12 Tda Armements Sas Soc Par Acti Dispositif de controle de mise a feu de la charge d'une roquette et procede de lancement d'une roquette equipe d'un tel dispositif.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009011447B9 (de) * 2009-03-03 2012-08-16 Diehl Bgt Defence Gmbh & Co. Kg Verfahren zum Zünden eines Gefechtskopfs einer Granate und Fahrzeug

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3176518A (en) * 1961-08-24 1965-04-06 Systron Donner Corp Dual acceleration range integrating accelerometer
US3340387A (en) * 1963-04-03 1967-09-05 Gen Time Corp Integrating device
US3353487A (en) * 1966-05-11 1967-11-21 Bendix Corp Device for measuring flight distance of a missile
US3793890A (en) * 1972-05-22 1974-02-26 Us Navy Digital electronic integrating accelerometer
US4375192A (en) * 1981-04-03 1983-03-01 The United States Of America As Represented By The Secretary Of The Navy Programmable fuze
DE3307785A1 (de) * 1983-03-04 1984-09-06 Deutsch-Französisches Forschungsinstitut Saint-Louis, Saint-Louis Verfahren und vorrichtung zur einstellung eines geschoss-zeitzuenders
DE3309147A1 (de) * 1983-03-15 1984-09-20 Rainer Dipl.-Phys. 6901 Gaiberg Berthold Verfahren und anordnung zur korrektur eines zuendzeitpunktes
US4691152A (en) * 1986-02-19 1987-09-01 International Business Machines Corporation Data disk drive velocity estimator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0601983A3 (fr) * 1992-11-12 1994-08-31 Bofors Ab
EP0661516A1 (fr) * 1993-12-30 1995-07-05 Alliant Techsystems Inc. Fusée magnétique multifunctionnelle
US5497704A (en) * 1993-12-30 1996-03-12 Alliant Techsystems Inc. Multifunctional magnetic fuze
FR2899679A1 (fr) * 2006-04-07 2007-10-12 Tda Armements Sas Soc Par Acti Dispositif de controle de mise a feu de la charge d'une roquette et procede de lancement d'une roquette equipe d'un tel dispositif.
WO2007115998A1 (fr) * 2006-04-07 2007-10-18 Tda Armements S.A.S Dispositif de controle de mise a feu de la charge d'une roquette et procede de lancement d'une roquette equipe d'un tel dispositif

Also Published As

Publication number Publication date
EP0348985A3 (fr) 1990-03-07
DE3822072A1 (de) 1990-01-04

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