SE2100080A1 - Projectile and fire pipe with brake - Google Patents

Abstract

The invention relates to a projectile (1) arranged with a target seeker (5) intended to be fired from a launching device comprising one or more brake panels (3, 3') where the brake panels (3, 3'), after unfolding, cause the projectile (1) to be arranged in a controlled commuting movement. The invention also relates to a fuze.

Description

|nkor_n to the Patent and Registration Office 2021 415" ïS PROJECTILE AND FIRE PIPE WITH BRAKE TECHNICAL FIELD The present invention relates to a projectile arranged with a brake where the projectile is intended to be fired from a launch device. The projectile includes one or more deployable brake panels which, when deployed, affect the properties of the projectile In addition, the invention is a fuze intended for a projectile which fuze includes one or more brake panels arranged to affect the projectile upon deployment.

BACKGROUND OF THE INVENTION, PROBLEM STATEMENT AND KNOWN TECHNOLOGY Barrel-launched projectiles, for example projectiles for artillery, are fired at target objects. The projectiles are intended to act against a target object and can, for example, steer towards the target object, with, for example, end-phase control, or act against the target object by bursting at the appropriate time, or in other ways cause the effect on the target object, for example by shrapnel acting on the target object. End phase guidance, i.e. the guidance at the end of the projectile's trajectory near the target, can for example be done by the projectile being arranged with a target seeker that scans the target area for target objects and steers the projectile towards an identified target object and can thus act with impact against the target object or the fragmentation effect by breeze near the target object. Alternatively, the projectile can operate with forward-directed fragmentation when the seeker has detected a target object and initiates the action against the target object, for example by bursting at the right time and thus causing the fragmentation effect against the target object, for example through forward-directed fragmentation action.

Patent document US 5,155,294 shows a warhead arranged with wings to affect the falling movement of the sub-warhead towards the ground. The patent document does not demonstrate a projectile or a fuze fitted with brake flaps.

Further problems which the invention intends to solve appear in connection with the subsequent detailed description of the various embodiments.

PURPOSE OF THE INVENTION AND ITS CHARACTERISTICS By deploying brake flaps during a projectile's journey towards a target object or target area, a oscillating movement on the projectile can be achieved. The swing can be, for example, in the order of 10 - 20 degrees. The oscillation means that a conical area can be scanned with a sensor arranged in the projectile.

The invention consists of a projectile arranged with a target seeker, intended to be fired from a skimming device, comprising one or more brake flaps where the brake flaps, after deployment, cause the projectile to be arranged in a controlled oscillating movement.

According to further aspects for the project according to the invention apply; that the projectile is arranged with an action part where selection of the action can take place; i.) directed blast action in the forward direction of the projectile, or ii.) fragmentation action in the radial direction of the projectile. that the brake valves are arranged on the projectile, in the longitudinal direction of the projectile, in the interval between a factor of 0.1 of the caliber of the projectile to a factor of 2 of the caliber of the projectile, from the nose of the projectile. that the radial extension of the brake flaps relative to the surface of the projectile, in the deployed position, is in the range between a factor of 0.1 of the caliber of the projectile to a factor of 1 of the caliber of the projectile. that the width of the brake flaps, the spread of the brake flap around the projectile in the outer radius of the projectile, in the deployed position, is in the range between a factor of 0.1 of the circumference of the projectile to a factor of 0.5 of the circumference of the projectile. a t t the brake flaps can be variably set between a fully extended position and a fully retracted position. a t t the brake flaps are arranged with an angle ot of between -45 degrees to 45 degrees. In addition, the invention is a fuze, for device on a projectile intended to be fired from a launching device, where the fuze is arranged with a target finder and including one or more brake panels, characterized in that the brake panels, after unfolding, cause the projectile, where the fuze is arranged on a projectile , ends up in a controlled oscillating movement. According to further aspects, the fuze according to the invention applies; that the brake panels are arranged on the fuze, in the longitudinal direction of the fuze, in the interval between a factor of 0.1 of the caliber of the projectile to a factor of 2 of the caliber of the projectile, from the nose of the fuze. that the radial extension of the brake panels relative to the surface of the fuze, in the deployed position, is in the range of a factor of 0.1 of the caliber of the projectile to a factor of 1 of the caliber of the projectile. that the width of the brake panels, the extension of the brake panel around the fuze at the outer radius of the fuze, in the deployed position, is in the range between a factor of 0.1 of the fuze circumference to a factor of 0.5 of the fuze circumference at the position on the fuze where the phenoms are arranged that the fuze panels are variable adjustable between fully extended position and fully retracted position. that the brake panels are arranged with an angle u of between 0.1 degrees to 10 degrees.

ADVANTAGES AND EFFECTS OF THE INVENTION The invention demonstrates a simple method for using brake flaps to cause an oscillation on a projectile which means that a conical area can be scanned with a target seeker arranged in the projectile. When a target is observed by the target seeker in the scanned target area, the projectile can act against the target. The target seeker scans the target area for target objects and can act against the target object with a forward blast effect, for example with beam-forming or splinter-forming RSV (Directed Blast Effect) LIST OF FIGURES The invention will be described in more detail in the following with reference to the attached figures where: Fig. 1 shows a projectile equipped with a fuze including unfolded brake flaps according to an embodiment of the invention.

Fig. 2 shows an ignition tube with brake flaps in the unfolded position according to an embodiment of the invention.

Fig. 3 shows a fuze in an alternative view according to an embodiment of the invention.

Fig. 4 shows a projectile provided with an active part with directed explosive action according to an embodiment of the invention.

Fig. 5 shows a projectile in the trajectory on its way to a target object when the brake flap is deployed from the projectile according to an embodiment of the invention.

DETAILED PERFORMANCE DESCRIPTION In fig. 1 shows a projectile 1, intended for launching in a launching device such as a cannon, with a fuze 2, where the fuze can be mounted as a separate unit on the projectile or made as part of the projectile 1. The projectile 1 is affected in the embodiment shown by brake flaps 3, 3' which are deployed from the projectile 1. The brake flaps 3, 3' can also be called panel, panel, fin, brake, wing, spoiler or canard. When the brake flaps 3, 3' are folded in, the projectile 1 is rotationally symmetrical around a center line C shown in the figure, where the center line is arranged in the longitudinal direction of the projectile. When the brake flaps 3, 3 ' are deployed, the projectile l is no longer rotationally symmetrical around the center line C shown. The brake flaps 3, 3 ' can be made in the form of a rectangular panel with a thickness, the extension of the panel in the same direction as in the longitudinal direction of the projectile, of between 1 mm - 4 mm and a width, the spread of the panel in a direction perpendicular to the thickness, of between 2 mm - 15 mm or by a factor between 0.1 - 0.5 of the circumference of the projectile where Circumference refers to the circumference of the projectile at the caliber of the projectile, that is, where the projectile has the largest diameter. The brake flaps 3, 3' can be folded out radially from the surface of the projectile body between 1 mm - 15 mm or by a factor between 0.1 - 1 of the caliber of the projectile. The location of the brake flaps longitudinally is, from the nose of the projectile, 20 mm - 150 mm or by a factor between 0.1 - 2 of the caliber of the projectile. The location in the longitudinal direction of the projectile is in relation to the center of gravity of the projectile to cause a moment on the projectile when the brake flaps 3, 3' are folded out. The location can also be between a factor of -2.5 - 2.5 times the caliber of the projectile relative to the center of gravity of the projectile. Preferably, two brake flaps 3, 3' are arranged on the projectile.

In fig. 2 shows a fuze with brass flaps 3, 3 ' folded out. Activation and deployment of the brake flaps 3, 3' can be done by mechanical, electromechanical, chemical or pyrotechnic devices. The ignition tube 2 is provided with a thread 4 to be provided to a shell body of a projectile 1 (not shown in figure 2). The igniter is arranged with a target finder 5 which can for example be an optical target finder.

In fig. 3 shows the fuze 2 from the side in an alternative embodiment with slanted brake panels 3, 3' where only one fin is visible in the projection shown. The brake panels are slanted relative to a line E-E perpendicular to the center line D-D of the fuze/projectile. The line E-E is perpendicular to the center line D-D which passes through the center of the circularly symmetrical fuze. The brake panels 3, 3' are inclined at an angle a relative to the line E-E. The angle is preferably in the range of 0.1 degrees to 5 degrees. The oblique phenomena 3, activation and precipitation can be done by mechanical, electromechanical, chemical or pyrotechnic device. The igniter 2 is provided with a thread 4 to be provided to a shell body for a projectile 1, not shown in the figure. The igniter is arranged with a target finder 5 which can for example be an optical target finder. The fuze is arranged with a chamfer 7 which is used to mount the fuze to the projectile.

In fig. 4 shows projectile 1 arranged with an action part arranged with an action part for directed explosive action 6, RSV. RSV exists in two commonly occurring forms, RSV III - beam-forming, and RSV IV - projectile-forming. Beam-forming RSVs typically use a cone-shaped metal insert, often copper or aluminum, and an explosive charge attached to the cone. When the explosive detonates, the metal cone is reshaped and launched. A subset of the metal forms a narrow beam of very high speed, can be in the order of 8 km/s to 10 km/s, which acts with great force on the target by, for example, penetrating armor plate. The remaining part of the metal forms a trailing projectile (also called "slug") that moves significantly slower, about 500 m/s. Warp with beam-forming RSV charges can penetrate armor with a thickness of the order of 5-7 times that of itself the diameter of the active part/charge. Projectile-forming RSVs use a metal insert that is cup-shaped or has a much flatter cone than beam-forming RSVs. Upon detonation, the entire metal insert forms a coherent projectile traveling at a speed of approximately 1.5 km/s - 2 km/s. The projectile's ability to penetrate armor is significantly worse than the beam-forming RSV, but it retains the penetrating power over much longer distances, of up to hundreds of meters. The effect of the projectile in projectile-forming RSV after penetration of the armor or the protective casing is also significantly better relative to the effect of the beam-forming subsequent projectile ("slug") in beam-forming RSV.

In fig. 5 shows the firing sequence 10 for an embodiment of the invention. The projectile 1 travels in the projectile trajectory on its way to a target object 16 in the target area 18. After the brake panel is dropped from the projectile, a projectile oscillation begins. When projectile 1 oscillates, a target area 18 can be scanned with a target seeker arranged in the projectile. When the projectile oscillates, the scanned target area 18 will be mainly circular in shape and the target seeker will be able to search the entire target area 18. When a target object 16 is detected by the target seeker, the projectile can act against the target object 16 by an explosive charge in the projectile bursting and acting with shrapnel or a beam against the target object, or otherwise act against the target object. When a target object has been detected by the target seeker, the action takes place preferably with directed blast action, RSV. In the event that no target is identified, the effective part can act radially from the projectile, for example through the fragmentation effect.

The oscillating movement can be adapted based on the target seeker and/or the target object and/or the design of the projectile by varying the design of the brake panel and/or how far the brake panel is deployed or at what frequency or interval the brake panel is deployed and/or at what speed and/or acceleration the brake panel is deployed . By varying the brake panel deployment, the size and appearance of the target area can be changed, for example if the target seeker identifies an object, the target area can be delimited to the identified object's surroundings.

The brake panels 3, 3' are deployed from the fuze 2 or from the projectile 1 in the trajectory of the projectile 1 to influence the attitude or angle of the projectile relative to the trajectory of the projectile. Examples of control of the brake panel 3, 3' can be based on the target of the projectile 1 and/or the position of the projectile 1. The target of the projectile 1 can be programmed or otherwise stored in the projectile 1 before launch but can also be communicated, with communication equipment such as a radio transmitter, to the projectile 1 in the projectile's path between the launch device and the target. The position of the projectile 1 is determined based on a navigation system/control system mounted in the projectile which receives the current position from satellite navigation and/or inertial navigation or another navigation system.

The control system can continuously evaluate the current position relative to the target position and calculated speed in order to control and/or optimize the trajectory of the projectile.

The target of the projectile 1 can also be determined with a target seeker 5 included in the projectile 1 which identifies a target and possibly steers the projectile 1 towards that target. Steering of the projectile 1 can be done, for example, with the brake lever, which entails steering in the longitudinal direction, and also includes steering in the lateral direction with dedicated control devices. The projectile's 1 target can - also be combated by the projectile in the projectile's trajectory through, for example, forward-acting shrapnel/beam.

At the appropriate position determined by the control system, a lock is initiated which retains the brake panels in the retracted position, which releases the brake panels 3, 3'. The brake panels 3, 3' are deployed by the rotational force of the projectile and/or preferably by a spring mounted in the deployment mechanism or another elastically deformed and biased operating device or by an actuator such as an electric motor.

After deployment of the brake panels 3, 3', the projectile 1 will begin a predetermined, based on the deployment, design, size and location of the brake panels 3, 3', oscillating motion. Failure of the brake panels will also affect the rotation of the projectile if the projectile is rotating.

An alternative design, not shown in the figure, of the unfolding mechanism means that both the extension and retraction of the brake panels 3, 3' can be regulated based on speed as well as level or length. Regulation of deployment and deployment takes place by a control system mounted in the projectile for the creation of variable oscillating action on the projectile 1 by folding out the brake panels 3, 3' fully, partially or alternately in and out from the projectile 1. By controlling the deployment mechanism, the oscillating action can is variably adjusted to variably control the l oscillation of the projectile.

ALTERNATIVE EMBODIMENTS The invention is not limited to the specifically shown embodiments, but can be varied in various ways within the framework of the patent claims.

It is understood, for example, that the number, size, material and shape of the elements and details included in the projectile equipped with a brake panel are adapted to the projectile type(s), weapon system and/or other design characteristics that are currently available.

It is understood that the above-described projectile designs with brake panels can include several different dimensions and projectile types depending on the area of use and barrel width. However, the above refers to at least the today's most common grenade types of between approx. 20 mm - 203 mm.

Claims (1)

1. Projectile (1) arranged with a target seeker (5), intended to be fired from a launch device, comprising one or more deployable brake panels (3), characterized in that the brake panels (3, 3'), after deployment, cause the projectile (1) arranged in a controlled oscillating movement by the brake panels (3, 3') falling out completely, partially or alternately in and out of the projectile (1)Projectile (1) according to claim 1, characterized in that the projectile is arranged with an action part where choice of effect can be done regarding; i.) directed blast action in the forward direction of the projectile, or ii.) fragmentation action in the radial direction of the projectile Projectile (1) according to the preceding claim, characterized in that the brake panels (3, 3') are arranged on the projectile (1), in the projectile longitudinally, in the range between a factor of 0.1 of the caliber of the projectile (1) to a factor of 2 of the caliber of the projectile (1), from the nose of the projectile (1) Projectile (1) according to the preceding claim, characterized in that the brake panels (3, 3') radial spread relative to the surface of the projectile (1), in the deployed position, is in the range of a factor of 0.1 of the caliber of the projectile (1) to a factor of 1 of the caliber of the projectile (1) (1) according to the preceding claim, characterized in that the width of the brake panels_(3, 3'), the extension of the brake panel around the projectile (1) in the outer radius of the projectile, in the deployed position, is in the range between a factor of 0.1 of the projectile ( 1) circumference to a factor of 0.5 of the circumference of the projectile (1) Projectile (1) according to one of the preceding claims, characterized in that the brake panels (3, 3') are variably adjustable between a fully extended position and a fully retracted position Projectile (1 ) according to one of the preceding claims, characterized by the brake panels (3, 3 ') is arranged with an angle ot of between -45 degrees and 45 degrees Firing tube (2), for device on projectile (1) intended to be fired from a launching device, where the firing tube (2) is arranged with target finder (5) and including one or more deployable brake panels (3, 3 '), characterized in that the brake panels (3, 3 '), after deployment, cause the projectile (1), where the fuze is arranged on a projectile (1), ends up in a controlled oscillating movement Firing tube (2), for device on a projectile (1) according to claim 8, characterized in that the brake panels (3, 3') are arranged on the firing tube (2), in the longitudinal direction of the firing tube , in the range between a factor of 0.1 of the caliber of the projectile (1) to a factor of 2 of the caliber of the projectile (1), from the nose of the fuze (2) Fuze (2), for device on the projectile (1) according to any of claims 8 - 9, characterized in that the radial extension of the brake panel (3, 3') relative to the surface of the fuze (2), in the deployed position, is in the range between a factor of 0.1 of the caliber of the projectile (1) to a factor 1 of the caliber of the projectile (1) Firing tube (2), for device on the projectile (1) according to any of claims 8 - 10, characterized in that the width of the brake panel (3, 3 '), the spread of the brake panel around the fuze (2) in the fuze outer radius, in the deployed position, is in the range between a factor of 0.1 of the fuze (2) circumference to a factor of 0.5 of the fuze (2) circumference at the position on the fuze where the brake panels (3, 3') are arranged Fuze ( 2), for device on a projectile (1) according to one of claims 8 - 11, characterized in that the brake panels (3, 3') are variably adjustable between a fully extended position and a fully retracted position Ignition tube (2), for device on a projectile ( 1) according to one of claims 8 - 12, characterized in that the brake panels (3, 3') are arranged with an angle u of between 0.1 degrees and 10 degrees.