KR102489643B1 - Apparatus for estimating damage and destruction using radar - Google Patents

Abstract

In the present embodiments, by using a range-velocity chart generated by extracting distance information and speed information from target information collected through a single radar beam and evaluating the degree of shooting down and damage, it is possible to efficiently operate radar time resources and armament It provides a shooting down and damage evaluation device that can improve the combat power of the system.

Description

Shooting down and damage evaluation device using radar {APPARATUS FOR ESTIMATING DAMAGE AND DESTRUCTION USING RADAR}

The technical field to which the present invention belongs relates to a weapon system that evaluates the degree of shooting down and damage of a target using a single radar beam in space.

The contents described in this part merely provide background information on the present embodiment and do not constitute prior art.

The armament system operates armaments to shoot down and neutralize enemy targets. In the weapon system using radar, it is required to effectively shoot down and evaluate the enemy's damage using radar after the engagement.

In particular, in the example of a system that requires simultaneous sequential engagement, such as the Close-In Weapons System (CIWS), the response time to the enemy threat target is remarkably short and urgent response is required, so the first threat target must be engaged. After that, rapid shooting down and enemy damage evaluation are required. This is because it is possible to engage the next target only when it is quickly confirmed whether the first engagement target is shot down, and to secure sufficient engagement time for the next target. In general, a close-in defense system intercepts aircraft or missiles approaching a ship, and includes radar, a control device, armaments, and the like.

Since the weapon system judges additional ordnance allocation or weapon operation to other targets based on the result of the shootdown evaluation, effective shootdown evaluation is an important factor in improving the combat power of the weapon system and combat system.

Korean Patent Publication No. 10-2015-0015974 (2015.02.11) Korean Registered Patent Publication No. 10-2214026 (2021.02.03)

Embodiments of the present invention enable efficient operation of radar time resources by evaluating shot down and damage using a range-velocity chart generated by extracting distance information and speed information from target information collected through one radar beam. The main purpose is to improve the combat power of the armed system.

Other non-specified objects of the present invention may be additionally considered within the scope that can be easily inferred from the following detailed description and effects thereof.

According to an aspect of this embodiment, in the apparatus for shooting down and evaluating damage using one radar beam, a target information collection unit for collecting target information using a signal reflected from a tracking target through the one radar beam; A distance information extractor extracting distance information for each pulse of target information, a speed information extractor extracting speed information for each distance gate of a pulse repetition interval of the target information according to the distance information, and the distance information and a shoot-down and damage evaluation unit that evaluates and outputs shoot-down and damage using a distance-velocity chart generated based on the speed information.

The distance-velocity chart may display the distance information and the speed information in directions perpendicular to each other, and divide the display into a first speed area, which is an approaching speed area, and a second speed area, which is a distant speed area.

Both ends of the distance-speed chart may indicate a zero-velocity region in which a stationary or slow target appears.

The first velocity region may display a threat target, and the second velocity region may display ejection ordnance.

The first velocity area may indicate a shoot down evaluation area along the threat target.

The shoot-down and damage evaluation unit may determine interception and shooting-down by analyzing a distance, position, and angle error between the threat target and the ejected ordnance based on the shootdown evaluation area.

The shoot-down and damage evaluation unit includes (i) first and second cases corresponding to failed interception and failed shoot-down, (ii) third case corresponding to successful interception and successful shoot-down, (iii) successful interception and unsuccessful shoot-down. The fourth case corresponding to may be distinguished and output.

The shoot-down and damage evaluation unit may determine the first case based on a first criterion for detecting the projectile ordnance in a remote area outside the shoot-down evaluation area.

The shoot-down and damage assessment unit may determine the second case based on a second criterion for not detecting the ejection ordnance within the shoot-down evaluation area for a predetermined period of time or longer.

The shoot-down and damage evaluation unit includes a third criterion for detecting N or more targets within the shoot-down evaluation area and a fourth criterion for failing to detect the threat target for a predetermined time or longer in a short-range area outside the shoot-down evaluation area. It is possible to determine the third case based on.

The shoot-down and damage assessment unit detects the third criterion for detecting N or more targets in the shoot-down evaluation area and the threat target in a short range outside the shoot-down evaluation area, and the speed of the threat target is reduced. The fourth case may be determined based on the fifth criterion.

As described above, according to the embodiments of the present invention, by using a range-velocity chart generated by extracting distance information and speed information from target information collected through one radar beam, the rate of shooting down and damage is evaluated, It is possible to efficiently use time resources and has the effect of improving the combat power of the armed system.

Even if the effects are not explicitly mentioned here, the effects described in the following specification expected by the technical features of the present invention and their provisional effects are treated as described in the specification of the present invention.

1 is a diagram illustrating a conventional radar shooting down evaluation operation.
2 is a diagram illustrating a shoot down and damage evaluation apparatus according to an embodiment of the present invention.
3 is a diagram illustrating a distance-velocity chart of a shooting down and damage evaluation apparatus according to an embodiment of the present invention.
4 to 7 are diagrams illustrating distance-velocity charts from weapon launch to the point of being shot down, which are processed by the shoot-down and damage evaluation apparatus according to an embodiment of the present invention.
8 is a diagram illustrating criteria for determining an interception and shooting down situation processed by a shootdown and damage assessment apparatus according to an embodiment of the present invention.
9 to 12 are diagrams illustrating distance-velocity charts corresponding to intercept and shoot-down situations processed by the shoot-down and damage evaluation apparatus according to an embodiment of the present invention.

Hereinafter, in the description of the present invention, if it is determined that a related known function may unnecessarily obscure the subject matter of the present invention as an obvious matter to those skilled in the art, the detailed description thereof will be omitted, and some embodiments of the present invention will be described. It will be described in detail through exemplary drawings.

1 is a diagram illustrating a conventional radar shooting down evaluation operation.

In the conventional weapon system, the main shooting down and damage evaluation were judged by the operator watching the images taken by the high-performance video camera.

In the case of using a radar, a number of radar beams were used in the azimuth and elevation directions to detect the existence of a large number of debris generated by the shot down, and the shot down evaluation was performed. The evaluation of the kill was performed by visually checking the radar-provided A-scope (representation of the size signal of targets against distance) by the operator. This method consumes a lot of radar resources (time resources) and increases the radar load because it is possible to evaluate the shooting down only by using a large number of beam resources when using a general radar. Manual judgment based on the operator's visual identification weakens the ability to respond to threats.

Referring to FIG. 1, it is possible to perform a shootdown evaluation with a total of 16 beams using 4 rows of beams in the elevation direction and 4 rows of beams in the azimuth direction.

When a friendly armament shoots down an enemy target, many fragments are spread in the space, and the radar scans a specific space with multiple beams to collect information on the fragment target. At this time, each radar beam obtains target information with respect to time as shown in FIG. 1 for a corresponding azimuth, elevation, and distance irradiated by the beam. In FIG. 1 , target information about a distance represents target information about a radar beam.

In the example of the kill assessment operation in FIG. 1, since 16 beams were used for the kill assessment, a set of range target information was obtained for 16 directions, and this information was communicated to the operator via the A-scope so that the operator could shoot down. There is a procedure for determining whether To form a typical A-scope, it uses fragment detection of the target using a range-ambiguity-free Low Pulse Repetition Frequency (LPRF) waveform.

The conventional shootdown evaluation method transmits a plurality of radar beams in elevation and azimuth directions and detects fragments bounced by the shootdown to evaluate shootdown. It is consumed.

In addition to the consumption of radar beam resources for each angle, it is inefficient to collect only two-dimensional information of the distance and angle direction to perform a shootdown evaluation by detecting fragments on the distance using only the distance information for each angle.

An inefficient shootdown assessment is being made by visually identifying the killdown assessment through the A-scope (size information of targets over distance). Because the final judgment depends on the operator's visual eye, human delay time occurs. Simultaneous response is impossible when performing a mission such as simultaneous engagement in a situation where the response time to the enemy threat is short.

Unlike conventional shootdown evaluation methods, if determination can be made with only one radar beam, the remaining beams can be allocated for search or tracking.

According to the shooting down and damage evaluation apparatus according to the present embodiment, a plurality of pulse waveforms are used in a single radar beam in space, signal processing is performed for distance and speed extraction, and then the distance and speed result pattern of the extracted target is calculated. Based on this, it quickly performs a shootdown evaluation. A distance-velocity chart can be applied when FFT (fast Fourier transform) is performed using a plurality of pulse waveforms.

2 is a diagram illustrating a shoot down and damage evaluation apparatus according to an embodiment of the present invention.

The shoot down and damage evaluation device 10 includes a target information collection unit 100 , a distance information extraction unit 200 , a speed information extraction unit 300 and a shoot down and damage evaluation unit 400 . The shoot-down and damage evaluation device 10 may independently operate a radar beam or utilize a radar beam of a weapon system.

The target information collection unit 100 collects target information using a signal reflected from a tracking target through one radar beam.

The target information collection unit 100 generally operates a tracking beam of a radar toward an enemy target in order to allocate armament to an enemy target, and performs beam steering control so that the tracking beam is irradiated to the exact center of the target. This is to maximize the radar accuracy required for armament. In the process of tracking the target, the radar generates a waveform based on the distance and speed information of the target obtained in advance from the search beam, and uses LPRF (Low Pulse Repetition Frequency), MPRF (Medium Pulse Repetition Frequency), and HPRF (High Pulse Repetition Frequency). Extract the distance and speed of the target without ambiguity under the environment of use.

The target information collecting unit 100 irradiates a radar beam toward the center of the target to extract information on the tracking target, collects the reflected signal, and receives target information.

Since the shootdown evaluation always determines whether or not the weapon is shot down after dispensing, the radar can operate a tracking beam with a wide beam width to simultaneously perform target tracking and shootdown evaluation using the information on the weapon administration in the weapon system. . This is because the beam shape can be freely used in a system using an active phased array radar, so the tracking beam for shooting down evaluation can be controlled to use a wide beam.

A plurality of pulses must be used to collect target information, and a dwell time (ρ, radar beam irradiation time) suitable for Equation 1 must be set in order to detect with excellent speed resolution.

ρ: Dwell time (radar beam irradiation time)

k: side lobe suppression factor according to the Doppler window, typically a value between 1.2 and 1.3

λ: wavelength for carrier frequency

v _res : speed resolution

The distance information extraction unit 200 extracts distance information for each pulse of target information. The distance information extraction unit 200 extracts distance information for each pulse of the collected signal. This can be done through pulse compression techniques.

The speed information extraction unit 300 extracts speed information for each distance gate of a Pulse Repetition Interval (PRI) of target information according to the distance information. The speed information extraction unit 300 extracts speed information for each distance gate of the PRI from which the distance information is extracted. If there are N distance gates in the PRI, speed information for each distance gate for the N distance gates is extracted. For extracting speed information, a general Fast Fourier Transform (FFT) may be used, and in a special case, Finite Impulse Response (FIR) bandpass filters may be used. Through this filter information, a Doppler frequency component for each gate can be extracted and a corresponding velocity can be extracted from the Doppler frequency component.

The result obtained through the distance information extraction unit and the speed information extraction unit is a distance-speed chart, which is illustrated in FIG. 3 .

The shoot-down and damage evaluation unit 400 evaluates the shoot-down and damage using a distance-velocity chart generated based on distance information and speed information, and outputs the result. The shoot down and damage evaluation unit 400 utilizes a distance-velocity chart according to the operation of a shoot down evaluation beam operated after armament allocation.

4 to 7 are diagrams illustrating distance-velocity charts from weapon launch to the point of being shot down, which are processed by the shoot-down and damage evaluation apparatus according to an embodiment of the present invention.

When an armament is assigned to a target being tracked, as in the examples of FIGS. 4 to 7 , a shootdown evaluation is performed by opening a shootdown evaluation area based on the position of an enemy threat target in the distance-velocity chart of the tracking beam.

When an enemy target is shot down, the fragments are scattered in the direction of the distance, and the scattered fragments are scattered at a speed that suddenly decreases from a higher speed to the direction of the velocity. Therefore, a shoot-down evaluation is performed with a range for the distance and speed at which the scattering of fragments can be meaningfully displayed, and this is set as the shoot-down evaluation area.

The shootdown evaluation area is an area limited so that the shotdown judgment is not erroneously performed due to false signals that may be generated by noise or other unspecified phenomena, not by the characteristics of fragments caused by the shooting down of the target.

3 is a diagram illustrating a distance-velocity chart of a shooting down and damage evaluation apparatus according to an embodiment of the present invention.

The distance-velocity chart may display distance information and speed information in directions perpendicular to each other, and may be divided into a first speed area, which is an approaching speed area, and a second speed area, which is a moving speed area. Both ends of the range-speed chart may indicate a zero-velocity region where a stationary or slow target appears. The first velocity region may display a threat target, and the second velocity region may display ejection ordnance. The first velocity area may indicate a kill rate area along the threat target.

The distance vs. speed chart is a chart made through one radar beam and can indicate target information for a speed area made by a pulse repetition frequency (PRF), which is a pulse repetition period. On the left and right of the chart, stationary or low-speed targets appear in the zero-speed area, approaching threat targets appear in the first speed area, and low-threat targets moving away from the radar appear in the second speed area.

4 to 7 are diagrams illustrating distance-velocity charts from weapon launch to the point of being shot down, which are processed by the shoot-down and damage evaluation apparatus according to an embodiment of the present invention.

After armament allocation, the shootdown evaluation area is opened based on the enemy threat target, and the characteristics of the ejected weapon flying toward the enemy threat target are shown through a distance-velocity chart.

Since the enemy threat target is an approaching target, it exists at a specific distance position in the positive speed range, and the ejected projectile is in the negative speed range, moving away from the friendly force, so the distance-velocity chart shown by the tracking beam for shoot down evaluation is gradually increasing in the negative speed range. appears in the form of a receding

When an enemy threat target approaching and an ejection bullet moving away exist at the same distance, and the angle information of the two detected targets falls within the shooting down error range, it becomes the moment of interception.

Referring to FIGS. 4 to 7 , it is possible to confirm a situation assuming that an enemy threat target and an ejection bullet are present in one tracking beam tracking the enemy threat target. This is because an ejection projectile generally flies toward an enemy threat target, and thus an enemy threat target and an ejection projectile coexist within one radar beam.

8 is a diagram illustrating criteria for determining an interception and shooting down situation processed by a shootdown and damage assessment apparatus according to an embodiment of the present invention.

The shoot-down and damage evaluation unit may determine interception and shooting-down by analyzing the distance, position, and angle error between the threat target and the ejected ordnance based on the shootdown evaluation area.

Shootdown and Damage Assessment Division: (i) case 1 and 2 for failed interception and unsuccessful shootdown, (ii) case 3 for successful interception and successful shootdown, (iii) for successful and unsuccessful interception It is possible to distinguish and output the fourth case.

The shoot-down and damage evaluation unit may determine the first case based on the first criterion for detecting ejection ordnance in a remote area outside the shoot-down evaluation area.

The shoot-down and damage evaluation unit may determine the second case based on the second criterion of not detecting ejected ordnance for a predetermined time or longer within the shoot-down evaluation area.

The shoot-down and damage evaluation unit based on the third criterion for detecting N or more targets within the shoot-down evaluation area and the fourth criterion for not detecting a threat target for more than a preset time in the short-range area outside the shoot-down evaluation area case can be judged.

The shootdown and damage evaluation unit is based on the 3rd criterion for detecting N or more targets within the shootdown evaluation area and the 5th criterion for detecting a threatening target in a short range outside the range of the shootdown evaluation area and reducing the speed of the threatening target. As a result, the fourth case can be determined.

9 to 12 are diagrams illustrating distance-velocity charts corresponding to intercept and shoot-down situations processed by the shoot-down and damage evaluation apparatus according to an embodiment of the present invention.

Referring to FIGS. 9 to 12 , it is possible to check the distance-velocity chart by the tracking beam at the moment of judgment about interception and shooting down.

9 and 10 show cases in which interception and shooting down have failed, and the shooting down evaluation area is opened and monitored centering on the enemy threat target.

9 (case 1) is a shape in which the detected projectile moves outside the shootdown evaluation area, and this pattern means interception and shootdown failure. Through this, the arming system can automatically recognize and perform additional arming assignments, and it is possible to request arming reallocation by displaying a warning to the operator.

10 (second case) shows a case where an ejected bullet is not detected, for example, when an ejected bullet is not detected for more than several seconds, it is determined that an interception or shooting down has failed.

If the interception succeeds, a number of detection targets are generated spreading in the range and speed domains as shown in FIGS. 11 (third case) and 12 (fourth case). This is due to the explosion of fragments caused by the interception, and the fragments occur sporadically throughout the interception evaluation area because they occur in the direction away from the target and friendly forces flying faster.

The shoot-down and damage evaluation device performs intercept and shoot-down evaluation based on the number of fragment detection targets (N) that determine the degree of damage within the shoot-down evaluation area. These multiple detection targets suddenly occur abnormally, and since this is a phenomenon caused by an explosion caused by an interception, it is judged as an interception. If necessary, the distance-velocity chart can be provided as a video so that the operator can judge whether to intercept or shoot down.

When a fragment burst is detected, the shootdown evaluation area does not follow the enemy threat target, stops in the range and speed areas (first speed area and second speed area) and observes the amount of fragmentation. This is used to evaluate the damage through N fragment targets that are judged meaningful.

If N fragments are detected and an enemy threatening target is additionally detected in the area closer than the distance in the shooting down evaluation area, the interception is successful, but it is judged as a shooting down failure.

In this case, the degree of damage can be evaluated by the number of N fragments, and the number of N fragments can be listed through experiments or verified modeling simulations in advance, and the degree of damage can be made possible.

The shooting down and damage evaluation apparatus according to the present embodiment evaluates shooting down and damage to an enemy threat target efficiently through a single beam in space. Unlike the conventional technique of shooting down evaluation using multiple beams, by performing shooting down evaluation of a target through a single beam in space, it is possible to efficiently operate radar time resources, thereby improving the combat power of the weapon system.

The shoot-down and damage assessment apparatus according to the present embodiment improves survivability and combat power by performing shoot-down evaluation through one beam in space under an urgent situation of simultaneous engagement and enabling engagement with the next opponent immediately.

The shoot-down and damage evaluation apparatus according to the present embodiment can evaluate engagement only with radar, so it can be used in an automated engagement system, and can improve combat power by providing a considerably faster decision compared to the operator's visual shoot-down decision.

The shoot-down and damage evaluation apparatus according to the present embodiment can determine interception and shoot-down, and even perform damage evaluation, and provides target size information for distance and speed so that an operator can make a shoot-down determination with the naked eye. It can be provided as a video.

The shooting down and damage evaluation apparatus may be installed in a computing device equipped with hardware elements in the form of software, hardware, or a combination thereof. A computing device includes a variety of devices including all or part of a communication device such as a communication modem for communicating with various devices or wired/wireless communication networks, a memory for storing data for executing a program, and a microprocessor for executing calculations and commands by executing a program. can mean a device.

These embodiments are for explaining the technical idea of this embodiment, and the scope of the technical idea of this embodiment is not limited by these embodiments. The scope of protection of this embodiment should be construed according to the claims below, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of rights of this embodiment.

10: Shoot down and damage assessment device
100: target information collection unit
200: distance information extraction unit
300: speed information extraction unit
400: Shoot down and damage evaluation department

Claims (11)

In the shooting down and damage evaluation device using one radar beam,
a target information collection unit that collects target information using a signal reflected from a tracking target through the one radar beam;
a distance information extraction unit extracting distance information for each pulse of the target information;
a speed information extraction unit extracting speed information for each distance gate of a pulse repetition interval of the target information according to the distance information; and
A shoot-down and damage evaluation unit that evaluates and outputs shoot-down and damage using a distance-velocity chart generated based on the distance information and the speed information;
The distance-speed chart displays the distance information and the speed information in a direction perpendicular to each other, and divides them into a first speed area, which is an approaching speed area, and a second speed area, which is a moving speed area. and a damage evaluation device. delete According to claim 1,
Both ends of the distance-velocity chart indicate a zero-velocity region where a stationary or low-speed target appears. According to claim 1,
the first velocity region indicates a threat target;
The second speed region is a shooting down and damage evaluation device, characterized in that to display the ejection ordnance. According to claim 4,
The first speed region displays a shootdown evaluation region along the threat target. According to claim 5,
The shoot down and damage evaluation unit,
The shooting down and damage evaluation device, characterized in that for determining interception and shooting down by analyzing the distance position and angle error between the threat target and the ejection ordnance based on the shooting down evaluation area. According to claim 6,
The shoot down and damage evaluation unit,
(i) Case 1 and Case 2 corresponding to the failure to intercept and the failure to shoot down;
(ii) a third case of successful interception and successful shoot-down;
(iii) Shooting down and damage evaluation device characterized in that the fourth case corresponding to successful interception and failure to shoot down is output separately. According to claim 7,
The shoot down and damage evaluation unit,
The shooting down and damage evaluation device, characterized in that the first case is determined based on a first criterion for detecting the ejection ordnance in a remote area outside the distance of the shooting down evaluation area. According to claim 7,
The shoot down and damage evaluation unit,
The shoot-down and damage evaluation device characterized in that the second case is judged based on a second criterion in which the ejection ordnance is not detected for a predetermined time or longer within the shoot-down evaluation area. According to claim 7,
The shoot down and damage evaluation unit,
The third criterion for detecting N or more targets within the shootdown evaluation area; and
The shoot down and damage evaluation device characterized in that the third case is determined based on a fourth criterion in which the threat target has not been detected for more than a preset time in a short range area outside the shoot down evaluation area. According to claim 7,
The shoot down and damage evaluation unit,
The third criterion for detecting N or more targets within the shootdown evaluation area; and
Detecting the threat target in a short range outside the shooting down evaluation area and determining the fourth case based on a fifth criterion in which the speed of the threat target is reduced.

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