RU2533659C1 - Self-contained radar installation for aerial target selection - Google Patents

Abstract

FIELD: radio engineering, communication.

SUBSTANCE: continuous non-modulated radio frequency generator is used. A part of its signal, after amplification, is radiated by an antenna via the antenna switch to the surrounding space. If an object is detected using a reflected signal, the closing rate of short-range radar stations of the weapon and the object, using the Doppler frequency is estimated. Another part of the generator signal is modulated to short radio pulses that are then amplified by another amplifier and are radiated to the surrounding space through the same antenna switch. Continuous and pulse radio signals, reflected by the object, are fed to the short-range radar input of the device, allowing to estimate both the distance to the object, and the closing rate. The process of the distance and closing rate measurement is performed within three range gate pulses, formed by the short-range radar. A decision of whether a real target is present is made by the device only if the reflected signal is present in any one from the three or in two adjacent range gate pulses, and the closing rate value corresponds to the estimated one of a real target.

EFFECT: higher short range radar immunity to passive interference if no data is present as to the time and location of the real target appearance and relatively short interoperation time with the object detected.

2 dwg

Description

The proposed autonomous radar device for selecting an air target relates to short-range radar, in particular to airborne radar ammunition devices that interact on the trajectory with airborne surveillance objects (targets) and increase noise immunity under various passive interference.

Such devices are mainly intended to provide increased noise immunity to passive interference of short-range radar (RBD) ammunition in the absence of a priori information about the place and time of occurrence of a real target with a relatively short interaction time of the RBD with the detected air object.

Radar devices for selecting air targets at short distances (“short” means distances commensurate with the geometrical dimensions of the target [1, 2]), can be used to solve problems not only with regard to ammunition, but also in many other cases when meeting A rbd of an aircraft with several air targets raises the problem of distinguishing from them only one, defined as a real target, against the background of a number of false ones. So, for example, in spacecraft, the proposed device can be used to detect real objects against the background of foreign objects, the so-called "space debris" [3]. Similar problems can be solved in other cases.

The selection of an air target against the background of passive interference by long-range radar devices has a number of features that preclude their use in solving similar problems in short-range radar, in particular in ammunition. These primarily include the following:

First, in such radar devices, a relatively complex and large-sized antenna system with phase control of angular scanning is used - a phase antenna array (PAR) with two-dimensional electronic scanning in elevation and azimuth [4].

Secondly, in such radar devices, according to the principle of their action, the use of pulsed modulation of the probing signal with a large duty cycle (1000-2000 or more) is required, the use of which is excluded in short-range radars due to the short trajectory interaction of oncoming objects at short distances. In short-range radars, a pulse sequence with a low duty cycle in the range of 2-50 can be used [1].

Thirdly, in such radar devices, the path information parameter, in addition to range and bearing, is the approach speed, the value of which is calculated by the computer as a derivative of the range change, which takes a relatively long time to calculate, which limits the speed of the entire search radar system [2] , which does not allow their use in short-range and short-range radar devices.

Thus, the main disadvantages of existing radar devices for selecting an air target at short distances are:

- bulkiness and complexity of antenna systems;

- large duty cycle of the sounding pulse signals;

- increased time for calculating the speed of approach of objects.

Of the known radar devices for selecting an air target, the closest in technical essence is the radar device described in the patent "Method for tracking the target path" (prototype) [5].

This radio device comprises an antenna, an antenna beam control device, a radio frequency generator, an antenna switch, a receiver, a synchronizer, and a calculator.

The main disadvantages of such a device are:

1) the need to use a relatively complex and large-sized antenna system with phase control of elevation and azimuth by two-dimensional electronic scanning (phase antenna array - PAR);

2) the need for a probing pulse signal with high duty cycle;

3) the relatively long duration of calculating the speed of approach of objects;

4) the increased danger of using such a rifle in ammunition due to the lack of a safety-actuating mechanism that actuates the ammunition firing circuit at the command of the rbd.

The present invention allows:

- detect one real target against the background of passive interference of a simplified phase-controlled antenna in one elevation plane;

- use the transmitter signal with low duty cycle pulses;

- continuously receive information about the speed of approach of objects;

- to achieve the necessary level of effectiveness of ammunition in conditions of passive interference;

- provide with a high degree of safety of the RBD in official circulation and error-free detonation of ammunition on its flight path under conditions of passive interference.

The technical result of the proposed autonomous radar device for selecting an air target is the ability to detect at limited distances one air target against a background of various passive interference, ease of technical implementation, highly efficient and safe operation of the device in small aircraft.

The technical result of the device is achieved by the fact that the following are introduced into the device containing the transceiver antenna, the antenna beam control device, the radio frequency generator, the antenna switch and the calculator: a modulator; mixer; signal adder; first and second power amplifier; Doppler frequency filter; pulse frequency converter; detector; speed recorder; range recorder; clock generator; first, second and third range registers; first, second and third speed registers; impulse counter; logical element "AND NOT"; logical element "NOT" and safety-actuating device.

A feature of the proposed device is that, firstly, it uses a continuous unmodulated radio frequency generator, part of the signal of which, after amplification by an amplifier, is radiated into the antenna space through an antenna switch. If there is an object in space, the signal reflected from it at the Doppler frequency is used to evaluate the rate of approach of the ammunition rifle with this object.

Secondly, a part of the radio signal of the continuous oscillator is modulated by the modulator in the form of short radio pulses, which are then amplified by another amplifier and are also radiated into the antenna space through the same antenna switch. The process of measuring the range and approach speed is carried out in the range gate formed by the RBD, the position and size of which is determined by the value of the allowable miss when the ammunition meets an air target, which, in turn, is associated with the property of the ammunition - its value of the "miss tube" (allowable miss, on in which the striking elements of ammunition with the highest probability can hit this target [6, 7]).

The pulsed radio signals reflected from the target are fed to the RRB input, and when the specified distance is determined by the range strobe, a pulse signal appears at the output of the range recorder, and a Doppler frequency signal appears at the output of the speed register.

To increase the accuracy of recording the range (target position in the gate) with target recognition by the speed of approaching the RBD, three distance gates are generated, which eliminates the uncertainty in estimating the position of the target caused by its simultaneous appearance in two adjacent gates.

, а вектор скорости боеприпаса с РБД составляет

, тогда результирующий вектор скоростей сближения РБД с реальной целью будет определяться скоростями движения РБД боеприпаса и самой целиThe decision to detect a real target is taken by the calculator only if a reflected signal appears in one of three or two adjacent gates, while the approach speed of the RDB with the target corresponds to the expected speed range. Since the condition is accepted that the elements of passive interference can be either stationary (for example, foreign structures) or slowly moving re-emitters (for example, in the form of a cloud of light metallized reflectors moving with wind speed), therefore, given the fact that the vector of the real target with respect to to the RDB moves at a speed $${\overline{V}}_{\ddot{O}}$$

, and the velocity vector of the ammunition with the RBD is

, then the resulting velocity vector for the approach of the RBD with the real purpose will be determined by the speeds of the RBD of the ammunition and the target itself

.

.

и наличии (или отсутствии) только пассивной помехи скорость сближения РБД с элементами пассивных помех будет регистрироваться в вычислителе значением

, в результате чего вычислителем принимается решение об отсутствии цели.In the absence of a fast moving target $$(\overline{V}\ddot{o}\to 0)$$

and in the presence (or absence) of only passive interference, the approach speed of the RDB with the elements of passive interference will be recorded in the calculator by the value

As a result, the calculator makes a decision about the absence of a target.

The decision on the presence of a target in the strobe will be positive only if the vector of the resulting approach speed is not lower than the expected speed of the meeting of the ammunition with the RBD relative to the real target

.

.

с достаточной точностью производится в вычислителе по доплеровской частоте $$F\ddot{a}$$

, в частности, по измеренному среднему значению за несколько периодов частоты Доплера

[1], так чтоApproach Speed Calculation Process

with sufficient accuracy is performed in the computer at the Doppler frequency $$F\ddot{a}$$

in particular, according to the measured average value over several periods of the Doppler frequency

[1] so that

,

,

- длительность периода n-го цикла частоты Доплера $$F\ddot{a}$$

;where n is the number of periods of the Doppler frequency selected for measurements (selected in the range n = 5-7 [1]); $$\raisebox{1ex}{$\mathrm{one}$}\!\left/ \!\raisebox{-1ex}{$F\ddot{a}.n$}\right.$$

- the duration of the period of the n-th cycle of the Doppler frequency $$F\ddot{a}$$

;

and given the fact that the Doppler frequency is estimated by the formula [1]

,

,

then the calculator determines the approximation rate by the formula

,

,

where λ is the wavelength of the probing signal of the RBD.

Figure 1 shows a variant of the possible interaction of an autonomous short-range radar device (AMB) of an ammunition with an air target under conditions of passive interference, which shows that the model of reflected passive interference, like any real air target, can be represented as separate "brilliant" "points of the surface of the reflector [8], from which the reflected signals fall on the input of the RBD.

The start of the gating is performed at the initial, initially set angle of the antenna radiation pattern α (Fig. 1).

The signals entering the RBD, formed by reflections of the reflector surface by one or several “brilliant” points detected in one of the three range gates, fixes the numerical value of the distance to the object (to the “brilliant” point), and the speed of approach of the RBD with the detected one is determined by the Doppler frequency object.

Then these signals are fed to the calculator, in which they are processed taking into account a priori known values:

- ground flight speed of the ammunition,

- the expected range of travel speeds of real air targets,

- the range of maximum permissible trajectory misses of the ammunition determined by its parameter

- "misses tube."

After registering the presence of reflected signals in the strobe characterizing the range and speed of encountering an obstacle, a phase change is made in the angle of the antenna pattern from angle α to angle β (see Fig. 1), after which the cycle of measuring the distance to the object and speed with it is repeated meeting, with the result that the calculator decides on the presence or absence of a real goal.

So, for example, if the signal in the strobe according to the Doppler frequency corresponds to the approach speed of the RDB with a stationary (or slowly moving) object, then the calculator makes a decision about the absence of a target, and the received signal is received by an interference signal. The goal search process continues.

The appearance of the reflected signal in the strobe, which is characterized by the Doppler frequency as reflected from a fast moving object, leads to a decision on its possible reflection from a real target, as a result of which the calculator gives a signal to reset the available information (about the distance to the target and the speed of approach to it) and a phase change in the angle of the beam pattern of the RBD antenna - from angle α to angle β, at which a repeated one-time target detection process is performed.

The selection of the rangefinder gates is made in accordance with the rangefinder value of the "miss tube" of the munition. Changing the angle of the antenna radiation pattern (angle β) is selected from the condition of its agreement with the cone of the expansion of the elements of destruction of the target (figure 1) [6, 7].

The proposed structural diagram of a radar device for autonomous selection of an air target is shown in figure 2, which indicates:

1 - radio frequency generator, 2 - modulator, 3 - mixer, 4 - signal combiner, 5 - antenna switch, 6 - transceiver antenna, 7 - first power amplifier, 8 - second power amplifier, 9 - Doppler frequency filter, 10 - frequency converter pulse signal, 11 - detector, 12 - speed recorder, 13 - range recorder, 14 - clock generator, 15 - first range register, 16 - second range register, 17 - third range register, 18 - first speed register, 19 - second register speed, 20 - third speed register, 21 pulse counter, 22 logical element "AND NOT", 23 logical element "NOT", 24 calculator, 25 antenna beam control device 26 safety-actuating mechanism.

A radar device for autonomous selection of an air target contains: a radio frequency generator 1, a modulator 2, a mixer 3, an adder 4, an antenna switch 5, a transceiver antenna 6, a first power amplifier 7, a second power amplifier 8, a Doppler frequency filter 9, a pulse signal frequency converter 10, detector 11, speed recorder 12, range recorder 13, clock generator 14, first range register 15, second range register 16, third range register 17, first speed register 18, second speed register 19, t there is a speed register 20, a pulse counter 21, an AND-NOT logic element 22, an NOT element 23, a calculator 24, an antenna beam control device 25, a safety actuator 26 so that the first output of the radio frequency generator 1 is connected to the inputs modulator 2, the first power amplifier 7 and the first signal input of the mixer 3, the output of the modulator 2 is connected to the input of the second power amplifier 8, the output of which is connected to the first input of the signal adder 4, the second input of which is connected to the output of the first amplifier power 7, the output of the signal adder is connected to the first input of the antenna switch 5 from which the signal is transmitted to the transceiver antenna 6, the output of the antenna switch 5 is connected to the second signal input of the mixer 3, the third input of which is connected to the output of the second power amplifier 8, the output of the mixer 3 is connected to the inputs of the Doppler frequency filter 9 and the frequency converter 10, the output of the Doppler frequency filter 9 is connected to the first input of the speed recorder 12, the output of the frequency converter of the pulse signal 10 is connected to detector detector 11, the output of which is connected to the first input of the range recorder 13, the output of which is connected to the information inputs of the first 15, second 16 and third 17 range registers, the output of the speed recorder 12 is connected to the third inputs of the first speed register 18, the second speed register 19 and third speed register 20, the output of the clock generator 14 is connected to the second inputs of the speed recorder 12 and the range recorder 13, as well as the first input of the pulse counter 21, the three outputs of the pulse counter 21 are connected to the corresponding three inputs of the logical element "AND NOT" 22 and at the same time, the first output of the pulse counter 21 is connected to the first input of the recording permission of the first range register 15 and the first input of the write permission of the first speed register 18, the second output of the pulse counter 21 is connected to the first resolution input range recording of the second range register 16 and with the first input of the recording permission of the second speed register 19, the third output of the pulse counter 21 is connected to the first input of the recording permission of the range of the third range register 17 and with the first the write enable path of the third speed register 20, the output of the AND-NOT logic element 22 is connected to the input of the logic element “NOT” 23 and to the second inputs of the read permission of the first range register 15, the second range register 16, the third range register 17, the first speed register 18, the second speed register 19, the third speed register 20, and the information outputs of the first range register 15, the second range register 16, the third range register 17, the first speed register 18, the second speed register 19 and the third regis speed rails 20 are connected, respectively, with the first, second, third, fourth, fifth and sixth inputs of the computer 24, the output of the logic element “NOT” 23 is connected to the second input (reset) of the pulse counter 21, the first output of the computer 24 is connected to the input of the control device beam of the antenna 25 and the second input of the clock generator 14, the output of the beam control device of the antenna 25 is connected to the second input of the antenna switch 5, the second output of the computer 24 is connected to the input of the safety-actuating mechanism 26.

, поступает на третьи информационные входы первого регистра скорости 18, второго регистра скорости 19 и третьего регистра скорости 20. С выхода смесителя 3 сигнал поступает также на преобразователь частоты 10, откуда преобразованный сигнал через детектор 11 поступает на первый информационный вход регистратора дальности 13, с выхода которого сигнал, пропорциональный текущей дальности R поступает на третьи входы первого регистра дальности 15, второго регистра дальности 16 и третьего регистра дальности 17.The radio frequency generator 1 generates a continuous signal, part of which is converted into short pulses of low duty cycle in the modulator 2, which are then amplified in the second power amplifier 8 and fed to the first input of the adder 4, from the output of which the pulse signal of small duty cycle is radiated into the space of the transceiver antenna 6 through the antenna switch 5. From the radio frequency generator 1, a continuous signal is also supplied to the first power amplifier 7, from the output of which the signal goes to the second input of the adder 4, with the output which a continuous signal is also radiated into the space by the transceiver antenna 6 through the antenna switch 5. If there is an air object, the signal reflected from it enters through the transceiver antenna 6 and the antenna switch 5 to the signal input 2 of the mixer 3. To the first heterodyne input 1 of the mixer 3 from the output of the radio frequency generator 1, an unmodulated signal arrives, and the second heterodyne input 3 of mixer 3 receives a signal from the output of the second power amplifier 8. From the output of mixer 3, the signal goes to the additional filter Rovsky frequency 9, from where it is fed to a first data input speed recorder 12, the output of which a signal proportional to the Doppler frequency $$F_{\partial }$$

is supplied to the third information inputs of the first speed register 18, the second speed register 19 and the third speed register 20. From the output of the mixer 3, the signal also goes to the frequency converter 10, from where the converted signal through the detector 11 goes to the first information input of the range recorder 13, from the output which signal proportional to the current range R is supplied to the third inputs of the first range register 15, the second range register 16 and the third range register 17.

, $${\text{R}}_{\text{2}}{\text{F}}_{д\text{2}}$$

, $$R_3{F}_{\ddot{a}3}$$

осуществляется тактовым генератором 14, сигналы которого поступает на управляющие входы регистратора скорости 12, регистратора дальности 13 и первый вход счетчика импульсов 21.The formation of three gates is made by the signals of the clock generator 14. Management of the joint measurement of ranges and speeds by Doppler frequencies in each individual gate, respectively $${\text{R}}_{\text{one}}{\text{F}}_{d\text{one}}$$

, $${\text{R}}_{\text{2}}{\text{F}}_{d\text{2}}$$

, $$R_3{F}_{\ddot{a}3}$$

carried out by a clock generator 14, the signals of which are fed to the control inputs of the speed recorder 12, range recorder 13 and the first input of the pulse counter 21.

The operation of the device in the absence of passive interference and the detection of a real target in one of the three range gates is as follows. At the first discrete time instant t ₁ , when the clock generator 14 is started by applying the Start command to its input, an information signal on the formation of the first range gate (the first current range R ₁ to the observed object) appears only at the output of the first register 15, and then a second time t ₂ the information signal on the formation of the second range gate (a second current range R to the observed object ₂₎ appears only on the output of the second register 16 range, at a third time t ₃ of the information signal ormirovanii strobe third range (R range thirds current ₃ to the observed object) appears only on the output of the third register 17 range.

появляется только на выходе первого регистра скорости 18, а затем во второй момент времени t₂, определяемый тем же тактовым генератором 14 информационный сигнал о второй текущей частоте Доплера $${\text{F}}_{д\text{2}}$$

появляется только на выходе второго регистра скорости 19, в третий момент времени t₃, определяемый тем же тактовым генератором 14, информационный сигнал о третьей текущей частоте Доплера $$F_{\ddot{a}3}$$

появляется только на выходе третьего регистра скорости 20.When a target is detected at the first discrete time moment t ₁ , the information signal about the first current Doppler frequency determined by the clock generator 14 $${\text{F}}_{d\text{one}}$$

appears only at the output of the first speed register 18, and then at the second time moment t ₂ , the information signal about the second current Doppler frequency determined by the same clock generator 14 $${\text{F}}_{d\text{2}}$$

appears only at the output of the second speed register 19, at the third time t ₃ , determined by the same clock generator 14, an information signal about the third current Doppler frequency $$F_{\ddot{a}3}$$

appears only at the output of the third speed register 20.

The signal from the first bit output of the pulse counter 21 is fed to the first input of the AND-NOT logic element 22, to the first input of the write enable of the first range register 15 and to the first input of the write enable of the first speed register 18. The signal from the second bit output of the pulse counter 21 is received to the second input of the AND-NOT logical element 22, to the first input of the write permission of the second range register 16 and to the first input of the write permission of the second speed register 19. The signal from the third bit output of the pulse counter 21 is received t to the third input of the AND-NOT logical element 22, to the first input of the write permission of the third range register 17 and to the first input of the write permission of the third speed register 20.

From the output of the AND-NOT logic element 22, the signal is fed to the input of the NOT gate 23 and the second read permission inputs of the first range register 15, the second range register 16, the third range register 17, the first speed register 18, the second speed register 19 and third speed register 20.

The information outputs of the first range register 15, the second range register 16, the third range register 17, the first speed register 18, the second speed register 19 and the third speed register 20 are connected respectively to the first, second, third, fourth, fifth and sixth inputs of the calculator 24, which the presence of the output signal at the second output characterizes the fact of detecting a real target. At the second output of the calculator 24 there will be no signal if there is no target and interference within the distance gates, while the signal will be absent both at the output of the speed recorder 12 and at the output of the range recorder 13, there will be no signal at the outputs of the first range register 15 , the second range register 16 and the third range register 17, at the outputs of the first speed register 18, the second speed register 19 and the third speed register 20. This state is registered by the calculator 24 by calculating the values of the range and speed of approach Nia DDB with air targets.

In the presence of only passive interference (in the absence of a real target), the signal appears sequentially in all gates, but by the calculator 24 this fact is recorded as the detection of interference formed by a stationary or slowly moving object that creates a signal with a reduced value of the Doppler frequency, and at the second output of the calculator 24 signals will not be.

If there is a target in the absence of interference, the signal will appear at the output of the range recorder 13, it will be at the outputs of the first range register 15, the second range register 16 and the third range register 17. A signal will also appear at the output of the speed recorder 12, as a result of which it will be on the outputs of the first speed register 18, the second speed register 19 and the third speed register 20. Given the appeared value of the Doppler frequency signal when a real target is detected by the calculator 24, this fact is recorded as the presence of an object in One of the three gates and from the first output of the transmitter 24 receives a signal at the input of the beam control device of the antenna 25, the output of which is connected to the second input of the antenna switch 5, while the angle of inclination of the radiation pattern changes. At the same time, from the first output of the calculator 24, the signal is fed to the second input of the clock generator 14, which causes a reset of all previous measurements and repeats the operation cycle in a one-time mode. When the angle of the antenna radiation pattern is changed and the measurement mode of the rangefinder and speed characteristics of the real target is repeated, it will be detected in the same range strobe as in the first measurement, causing the signal to reappear on the first output of the calculator 24, which causes the signal to appear on its second the output, thereby the input of the safety-actuating mechanism 26 receives an executive command, providing an undermining of ammunition.

Literature

1. Kogan I.M. Near radar (theoretical basis). M., Owl Radio. 1973. 272 p.

2. Radar devices (theory and construction principles). Vasin V.V., Vlasov O.V., Grigorin-Ryabov V.V., Dudnik P.I., Stepanov B.M. M .: Sov. Radio, 1970, 680 p.

3. S.S. Veniaminov. Space junk. A threat to humanity. 2nd ed. Ed. P.P. Nazarova, O.Yu. Aksenova. Ed. Mechanics, management and computer science. M .: 2013.

4. Khizha G.S., Vendik I.B., Serebryakova E.A. Microwave phase shifters and switches: Features of creation on p-i-n diodes in integrated design. M .: Radio and communications, 1984, 184 p.

5. RF patent No. 2463622 C1 "Method for tracking the target path." Application 2011123394.07. 06/08/2010 (prototype).

6. Dorofeev A.N. Rocket fuses. M.: VI MO of the USSR, 1963, p. 55.

7. Petukhov S.I., Stepanov A.N. The effectiveness of missile defense systems. M.: VI MO USSR, 1974, p. 44.

8. Rozovsky VB Statistical characteristics of group delay time for a set of scatterers // Radio engineering and electronics. - 1971. - No. 11 - S.2105-2109.

Claims (1)

An autonomous airborne targeting radar device containing a transceiver antenna, an antenna beam control device, a radio frequency generator, an antenna switch and a computer, which are distinguished by the following: a modulator, mixer, signal adder, first power amplifier, second power amplifier, Doppler frequency filter, converter pulse frequency, detector, speed recorder, range recorder, clock, first range register, second range register, third regis range, the first speed register, the second speed register, the third speed register, pulse counter, logical element "NAND", logical element "NOT", safety-actuating device so that the first output of the radio frequency generator is connected to the inputs of the modulator, the first power amplifier and mixer, the output of the modulator is connected to the input of the second power amplifier, the output of which is connected to the first input of the signal adder, the second input of which is connected to the output of the first power amplifier, the output of the adder sig ala is connected to the first input of the antenna switch, from the first output of which the signal enters the transceiver antenna, the second output of the antenna switch is connected to the second signal input of the mixer, the third input of which is connected to the output of the second power amplifier, the output of the mixer is connected to the input of the Doppler frequency filter and the frequency converter pulse signal, the output of the Doppler filter is connected to the first input of the speed recorder, the output of the frequency converter of the pulse signal is connected to a detector, the output of which is connected to the first input of the range recorder, the output of which is connected to the information inputs of the first, second and third registers, the output of the speed recorder is connected to the information inputs of the first speed register, second speed register and third speed register, the output of the clock generator is connected to the control the inputs of the speed recorder, range recorder and the counting first input of the pulse counter, the three outputs of the pulse counter are connected to the corresponding three inputs and an AND-NOT logic element, while the first output of the pulse counter is connected to the first input of the range recording permission of the first register and the first input of the speed recording of the fourth register, the second output of the pulse counter is connected to the second input of the AND-NOT logic element and the first inputs enable the recording of the range of the second range register and the second speed register, the third output of the pulse counter is connected to the third input of the logic element "AND NOT" and with the first inputs of the resolution permit recording the range of the third the range register and the third speed register, the output of the AND-NOT logic element is connected to the input of the logic element “NOT”, as well as with the second inputs of the permission to read the first range register, second range register, third range register, first speed register, second speed register , the third speed register, and the information outputs of the first, second, third range recorders and the first, second, third speed registrars are connected, respectively, with the first, second, third, fourth, fifth and with the inputs of the calculator, the output of the logic element “NOT” is connected to the second input of the pulse counter, the first output of the calculator is connected to the input of the antenna beam control device, the output of which is connected to the second input of the antenna switch and the second input of the clock generator, the second output of the calculator is connected to the input of the safety ammunition actuator.

Images