Balancing assembly comprising balancing rings for a missile and missile provided with such a balancing assembly

Patent metadata

Field	Value
Publication number	US-11293728-B2
Application number	US-201716466926-A
Country	US
Kind code	B2
Filing date	Nov 28, 2017
Priority date	Dec 8, 2016
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

Missile balancing assemblies include two balancing rings configured for mounting on a missile, each balancing ring having a ballast. Each balancing ring is configured to be rotated and rotationally fixed, and may include materials having different densities at different locations. Each balancing ring may further include an angular graduation.

First claim

The invention claimed is:

1. A balancing assembly for a missile, comprising:
two balancing rings configured to be mounted on the missile, each of said balancing rings comprising a ballast located on the corresponding balancing ring each of said balancing rings being configured to rotate and to be fixed in a plurality of angular positions, wherein each of said balancing rings comprises a ring made of a first material having a first density, and wherein for each of said balancing rings, the ballast is integrated into the ring made of the first material, the ballast being made of a second material having a second density which is greater than said first density.

2. The balancing assembly according to claim 1 ,
wherein for each of said two balancing rings, the ballast is integrated into a circular arc-shaped section of the ring made of the first material.

3. The balancing assembly according to claim 2 , wherein for each of said balancing rings, the ballast is fixed in the ring made of the first material.

4. The balancing assembly according to claim 3 , wherein each of said balancing rings has a peripheral angular graduation, and wherein for each of said balancing rings, said ballast is arranged at a given angular position with respect to said peripheral angular graduation.

5. The balancing assembly according to claim 4 ,
wherein the two balancing rings are arranged coaxially, next to one another, with the peripheral angular graduations of the two balancing rings facing one another.

6. The balancing assembly according to claim 5 , wherein each of said balancing rings has a set of adjustment holes distributed around a periphery thereof.

7. A missile comprising the balancing assembly claim 5 , wherein the two balancing rings of said balancing assembly are mounted on the missile coaxially along a longitudinal axis of said missile so as to be configured to rotate about the longitudinal axis.

8. The missile according to claim 7 ,
wherein the balancing assembly is mounted on a face of the missile that is radially external with respect to the longitudinal axis of said missile.

9. The missile according to claim 7 ,
wherein the balancing assembly is mounted inside an outer structure of the missile, said outer structure having at least one window enabling access through the outer structure to each of the balancing rings.

10. The missile according to claim 7 , further comprising fixing means configured to rotationally fix each of said balancing rings.

11. A method for balancing the missile of claim 7 , comprising the following successive steps:
a first measuring step that includes placing the missile on a balancing bench provided with at least three measuring points, in a first position, and measuring, in the first position, a first plurality of weight values of said missile measured respectively at said three measuring points;
a second measuring step that includes rotating the missile by 90° about the longitudinal axis thereof with respect to the first position to bring the missile into a second position on the balancing bench, and measuring, in the second position, a second plurality of weight values of said missile measured respectively at said three measuring points;
a first calculation step that includes calculating, from the first plurality of weight values and the second plurality of weight values measured at said first and second measuring steps, a set of coordinates in a transversal plane of a center of gravity of the missile;
a second calculation step that includes calculating, from the set of coordinates of the center of gravity and from a plurality of predetermined angular positions of the two balancing rings, an angular adjustment position for each of said balancing rings, the angular adjustment position of each of the two balancing rings being calculated to position the center of gravity of the missile in a predetermined zone in the transversal plane; and
an adjustment step that includes rotating each of the two balancing rings into the angular adjustment position thereof.

12. The method for balancing a missile according to claim 11 ,
further comprising a verification step implemented after the adjustment step that includes verifying, by implementing the first and second measuring steps and the first and second calculation steps, if the center of gravity of the missile is located in the predetermined zone in the transversal plane of the missile, and if not, to again implement the adjustment step.

13. The method for balancing a missile according to claim 11 , wherein said steps of the method are implemented automatically and robotically.

14. The balancing assembly according to claim 1 , wherein for each of said balancing rings, said ballast comprises shot which is coated in a resin.

Assignees

• Mbda France

Inventors

• Bourdillon Rémi
• Reisch François
• Guibout Vincent

Classifications

• F42B35/00

  Testing or checking of ammunition {(apparatus for measuring the energy of projectiles G01L5/14)} · CPC title

• F16F15/32 Primary

  Correcting- or balancing-weights or equivalent means for balancing rotating bodies, e.g. vehicle wheels {(suppression of vibrations in rotating systems by using freely rotating masses F16F15/14; compensation of inertia forces F16F15/22; compensating imbalance for testing purposes G01M1/30)} · CPC title

• F42B10/02 Primary

  Stabilising arrangements · CPC title