EP0329524B1 - Dispositif de calcul du pas d'intégration de trajectoire d'obus - Google Patents

Dispositif de calcul du pas d'intégration de trajectoire d'obus Download PDF

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Publication number
EP0329524B1
EP0329524B1 EP19890400336 EP89400336A EP0329524B1 EP 0329524 B1 EP0329524 B1 EP 0329524B1 EP 19890400336 EP19890400336 EP 19890400336 EP 89400336 A EP89400336 A EP 89400336A EP 0329524 B1 EP0329524 B1 EP 0329524B1
Authority
EP
European Patent Office
Prior art keywords
trajectory
integration step
shell
values
point
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
EP19890400336
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0329524A1 (fr
Inventor
Serge Braconne
Jean-Luc Estival
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.)
Thales SA
Original Assignee
Thomson CSF SA
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 Thomson CSF SA filed Critical Thomson CSF SA
Publication of EP0329524A1 publication Critical patent/EP0329524A1/fr
Application granted granted Critical
Publication of EP0329524B1 publication Critical patent/EP0329524B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G3/00—Aiming or laying means
    • 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 device for calculating the integration pitch of a shell trajectory.
  • the subject of the present invention is a device for calculating such an optimized integration step, that is to say the maximum integration step compatible with the required precision, making it possible to save on the integration time of the trajectories. without losing on the precision of the integration calculation.
  • the set of these variables constitutes a point P of the trajectory.
  • time limit noted h limit
  • firing configurations T each of which is characterized by the following parameters: firing conditions applied to the cannon, geographic and meteorological data, characteristics of the shell (mass, ejection speed).
  • This method is relatively costly in calculation time, but it does not have to be implemented in the field, in the calculation means associated with the firing battery; it will advantageously be implemented beforehand, with more efficient calculation means than those associated with the firing battery, the performance of which is obviously limited for reasons of bulk. Since this database cannot be exhaustive, it is necessary, if we want to effectively reduce the time taken to calculate trajectories in the field, using the calculation means associated with the firing battery, to determine a means quick calculation of the h lim value corresponding to any point P, from this database and according to the parameters existing at the point considered and the firing configuration considered.
  • explanatory variables that is, variables according to which the variable to be modeled h lim is expressed according to a certain function.
  • This geometrically amounts to carrying out a projection of the set of points representing h lim in the space of the different variables "x" of the set (T, X, ⁇ p ), on each plans (h lim , x), then to select those of these variables "x" having the strongest explanatory power.
  • h lim is expressed linearly, by domain, of the explanatory variables.
  • M denotes the Mach number (ratio of the speed of the shell to the speed of sound)
  • P r the local pressure
  • m the mass of the shell
  • T e temperature
  • U o speed of ejection of the shell.
  • Each of the eight zones thus defined corresponds to a set of coefficients b i 1, b i 2, b i 3, b i 4, b i 5 (1 ⁇ i ⁇ 8) used in the expression of the above model. These different cases will appear in FIG. 3 which will be described later.
  • the model is represented graphically making it possible to approximate h lim in a limited space for greater clarity with the two explanatory variables ⁇ p and M ⁇ 2 and in this space we have only considered the case M> M0 (zone " High Mach ").
  • This model is constituted by a succession of planes which each project, as represented on figure 2a, in each of the planes (h lim , ⁇ p ) and (h lim , M ⁇ 2) according to the line segments resulting from the modeling linear.
  • the values of the parameters which it is necessary to know at the point considered are the values of the parameters M, U X , U Y , U Z , A0, T e , P r , U o , W X , m.
  • the parameters U X , U Y , U Z designate the components of the absolute speed of the shell at the point considered; A0 denotes the rise of the barrel.
  • the value of the increase A0 is necessary for the calculation of the tolerable position error by step ⁇ p at the point considered.
  • This modeling of ⁇ p is obtained from a database ( ⁇ p , T) which can itself be obtained in the following way.
  • the invention makes it possible to significantly reduce the calculation times and to dispense with operators specialized in the calculation means associated with the firing battery; the architecture of these is simplified and their energy consumption reduced, which is fundamental for problems of portability and autonomy.
  • the device according to the invention makes it possible to reduce this number to around twenty.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
EP19890400336 1988-02-17 1989-02-07 Dispositif de calcul du pas d'intégration de trajectoire d'obus Expired - Lifetime EP0329524B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8801857 1988-02-17
FR8801857A FR2627302B1 (fr) 1988-02-17 1988-02-17 Procede et dispositif de calcul du pas d'integration de trajectoire d'obus

Publications (2)

Publication Number Publication Date
EP0329524A1 EP0329524A1 (fr) 1989-08-23
EP0329524B1 true EP0329524B1 (fr) 1993-05-12

Family

ID=9363327

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890400336 Expired - Lifetime EP0329524B1 (fr) 1988-02-17 1989-02-07 Dispositif de calcul du pas d'intégration de trajectoire d'obus

Country Status (4)

Country Link
EP (1) EP0329524B1 (da)
DE (1) DE68906418T2 (da)
DK (1) DK66489A (da)
FR (1) FR2627302B1 (da)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2294133B (en) * 1994-10-11 1999-08-18 Accuracy Int Ltd Ballistic calculator
DE102005023739A1 (de) 2005-05-17 2006-12-07 Krauss-Maffei Wegmann Gmbh & Co. Kg Verfahren zur Ermittlung einer Feuerleitlösung
DE102006036257A1 (de) * 2006-08-03 2008-02-07 Rheinmetall Defence Electronics Gmbh Bestimmung der einzustellenden Ausrichtung einer ballistischen Waffe

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2459443A1 (fr) * 1979-06-15 1981-01-09 Thomson Brandt Procede et dispositif de determination des elements de tir d'un projectile
SU860082A1 (ru) * 1979-10-03 1981-08-30 Таганрогский радиотехнический институт им. В.Д.Калмыкова Стохастический интегратор
GB2094950B (en) * 1981-03-12 1984-08-30 Barr & Stroud Ltd Gun fire control systems
GB2098705A (en) * 1981-05-15 1982-11-24 Marconi Co Ltd A gun aiming arrangement

Also Published As

Publication number Publication date
DE68906418D1 (de) 1993-06-17
DE68906418T2 (de) 1993-09-09
DK66489D0 (da) 1989-02-13
DK66489A (da) 1989-08-18
EP0329524A1 (fr) 1989-08-23
FR2627302B1 (fr) 1990-06-08
FR2627302A1 (fr) 1989-08-18

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