JP2005114457A - Aircraft - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aircraft for protecting its airframe from a menace, having small output power, and preventing its projection timing from directly affecting the position of the menace, in a combination disturbance control method and system. <P>SOLUTION: This aircraft comprises an interior type ECM device 2; a projection means 3 for projecting an interior type ECM device; and an exterior type ECM device 5. The ECM device 2 starts the outputting of a pseudo reflected radiowave having a frequency corresponding to the frequency of a received radiowave, then shifts the frequency of the radiowave, whose outputting is started, from the frequency band of the received radiowave at least to a band separate therefrom, and then stops the outputting of the radiowave. The ECM device 5 is projected by the projection means 3 to output the radiowave having a frequency in the separate frequency band. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an aircraft, and more specifically, as a means for a body (particularly a large body) to self-protect from a threat such as a radio-guided missile (missile or a mother machine that has emitted a missile), there are two types: an interior type and an exterior type. The present invention relates to an aircraft having an ECM (Electronic Countermeasures) in combination with an ECM device of a type.

The missile is configured to receive a radio wave emitted from itself or from the mother machine, move at high speed in the received direction, and finally hit a target emitting the reflected wave. As a conventional large-scale ECM device, a means for deceiving a missile is prepared by throwing dumped material such as chaff out of the machine. As a conventional system of this type, there is a technology for preventing malfunction caused by radio wave interference when both radio wave jamming devices are operated simultaneously in a radio wave jamming system composed of an installation type radio wave jamming device and an emission type radio wave jamming device. It is known (see, for example, Patent Document 1). Further, as another technique, a technique is known in which interference waves are transmitted from at least two jammers to jam the radar (see, for example, Patent Document 2).
JP-A-6-331730 (page 4, page 5, FIG. 2) Japanese Patent Laid-Open No. 2001-194447 (page 3, FIG. 1)

  Originally, the above-described method such as whispering the chaff needs to move rapidly after whispering and divert the existence of the own device from the target of the threat. However, large-scale aircraft are not good at abrupt maneuvering and cannot be effective. There are also cases where an internal ECM device is installed, which is a means of disturbing threat radar by emitting strong radio waves from the electronic deception device built in the aircraft. Technology has been developed that cannot be an effective defense measure.

  To completely remove missiles and other threats, it is effective to physically and electrically separate the threat from the aircraft (mother machine) using an external ECM device. The exterior-type ECM device that can be simulated requires a large amount of power, and the size thereof is increased accordingly.

  The present invention has been made in view of such a problem, and can protect an airframe from a threat, and furthermore, an aircraft whose output power is small and the injection timing does not directly affect the position of the threat. The purpose is to provide.

The present invention enables pseudo maneuvering by controlling the interior type ECM device and the exterior type ECM device in combination by performing Doppler frequency control, and it is possible to cope with new missiles that are effective even for large non-mobility aircraft. An ECM device is provided. Further, the combination disturbance control is performed so that the output power is small and the injection timing does not directly affect the threat position.
(1) The invention according to claim 1 starts the output of the pseudo-reflected radio wave having a frequency corresponding to the frequency of the received radio wave, and thereafter, the frequency of the radio wave that has started the output is at least separated from the frequency band of the received radio wave The internal type ECM device that shifts the output to the position and then stops the output of the radio wave, the injection unit that injects the external type ECM device, and the external type that outputs the radio wave having the frequency in the separated frequency band emitted by the injection unit And an ECM device.
(2) The invention according to claim 2 is characterized in that the exterior type ECM device includes frequency shift means for giving a frequency shift of a shift direction and a shift speed similar to the shift of the frequency in the internal type ECM device for the output radio wave. It is characterized by that.
(3) In the invention according to claim 3, the interior type ECM device and the exterior type ECM device are provided with a period in which the frequency of the same frequency is output at the same time, or the output of the interior type ECM device is stopped. The output of the radio wave of the exterior type ECM device is started from the same frequency as the frequency at the time.

(1) According to the first aspect of the present invention, the interior-type ECM device outputs a pseudo-reflected radio wave, and shifts the frequency to a band separated from the band of the received radio wave, whereby the pseudo-reflected radio wave is received. Since the external type ECM device that emits the frequency outside the frequency band outputs the frequency, the tracking of the device that performs the tracking control according to the reflected wave of the transmission radio wave is performed. Can be disturbed.
(2) According to the second aspect of the present invention, it is possible to obstruct the follow-up to a device or the like that performs follow-up control in accordance with the frequency shift direction and shift speed of the reflected wave of the transmission radio wave.
(3) According to the invention described in claim 3, in the process of switching from the output of the internal ECM device to the output of the external ECM device, a period for outputting the same frequency is provided, so switching is smoother. Can be done. Further, in the process of switching from the output of the interior type ECM device to the output of the exterior type ECM device, the frequency can be switched without switching, so that the tracking of the device that follows the reflected radio wave can be more disturbed. it can.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, reference numeral 1 is an ECM controller that performs analysis and arrival direction of threat radio waves, Doppler frequency control of interior type and exterior type ECM devices, on / off control of interior type ECM devices, and on / injection timing control of exterior type ECM devices, 2 transmits, as a pseudo-reflected wave, a Doppler-modulated radio wave emitted by a threat according to the control of the ECM controller 1, and is different from the reflected wave reflected by the original aircraft at the frequency tracking gate of the threat An internal ECM device 3 that shifts to the band is an injector as an injection means for injecting an external ECM device 5 that takes over the threatening radio waves attracted by the internal ECM device 2 to the outside of the apparatus. Reference numeral 4 denotes an aerial wire connected to the internal ECM device 2, and 5 denotes an external ECM device that emits from the injector 3 and continues to shift the oscillation frequency in place of the internal ECM device 2. The operation of the system configured as described above will be described as follows.

  In the figure, reference numeral 1 denotes an ECM controller that controls the overall operation of the present invention. (A) Received (threat) radio wave analysis and arrival direction (forecast angle), (b) Interior-type ECM device 2 and exterior-type ECM device 5, (c) ON / OFF control of the internal ECM device 2, and (d) ON / OFF timing control of the external ECM device.

  Reference numeral 2 denotes an internal ECM device, which is a radio wave jamming device that starts output of radio waves in response to receiving a (threat) radio wave for the first time and gradually shifts the frequency. 3 is an exterior type ECM device, which is injected from the aircraft itself, and then outputs the radio waves inherited from the output radio waves of the interior type ECM device 2 to have the same effect as if the aircraft was simulated in place of the aircraft. It serves to keep the threat away from the aircraft.

  In the present invention, as shown in FIG. 1, Doppler modulation is applied to an area sufficiently separated from the reflected wave of the own device (for example, more than the frequency width for monitoring the reflected wave) by the internal ECM device 2. Further, the external ECM device 5 is emitted and the radio wave of the previous frequency shifted by Doppler modulation is output.

  Further, by combining the two ECM devices 2 and 5 and switching the output power in a stepwise manner, the output power of the external ECM device can be suppressed. Further, the injection timing can be controlled at the timing of Doppler control of the exterior type ECM device 5.

FIG. 2 is a diagram showing a control timing chart of the present invention.
(A) Radio wave A from the threat is emitted.
(B) When radio waves from threats arrive, the ECM controller 1 turns on the power of the interior ECM device 2. The turned-on internal ECM device 2 receives radio waves from threats and emits radio waves obtained by amplifying signals having the same frequency as the received frequency.
(C) The interior type ECM device 2 transmits, as a pseudo reflected wave, a signal obtained by applying Doppler modulation to a radio wave generated by a threat according to the control of the ECM controller 1. Therefore, the frequency tracking gate of the threat is outside the band of the reflected wave reflected by the original aircraft.
(D) When the ECM controller 1 determines that the threat frequency gate is outside the band of the original reflected wave (for example, it is determined that the frequency shift amount has reached a predetermined value), the external ECM device 5 is activated. Inject outside. In addition, before or after the injection, output of radio waves having the same frequency as the output frequency of the interior ECM device 2 or a higher (or lower) frequency than the predetermined frequency is started. Preferably, the frequency is shifted by a predetermined value in a direction opposite to the shift direction.
(E) After the exterior-type ECM device 5 is emitted to the outside of the apparatus, the interference due to the pseudo reflection of the interior-type ECM device 2 is stopped, and radio waves are output only from the exterior-type ECM device 5.
(F) The external ECM device 5 continues to emit radio waves (for example, the output radio waves are gradually shifted in frequency) while falling and keeps the threat away from its own device while falling, for example. The missile tracks the discarded exterior ECM device 5 as a target.

  As described above, according to the present invention, the two types of ECM devices are controlled in cooperation to protect the aircraft from threatened radio wave missiles and the like. At this time, the apparent movement is realized by electrically changing the Doppler. In this way, when the interior type ECM device and the exterior type ECM device enter the threat frequency gate, the operation of the interior type ECM device is stopped, and the exterior type ECM device is injected to make the missile appear to be the target, and the aircraft body Can be protected from missile attacks.

Next, the operation principle of the present invention as seen from the missile's radiological viewpoint will be described.
1. Missile tracking start A missile guidance radio wave from a missile or missile mother machine is received, and the ECM controller 1 identifies the type, arrival direction, and frequency of the radio wave, and extracts frequency gate width information. At this point, the missile's eyes are only seeing the reflected waves of the aircraft.
2. Interference Control by Internal Type The internal type ECM device 2 performs processing to amplify and bounce received radio waves under the control of the ECM controller 1. At this time, control is performed to transmit transmission power that increases the power for missile eyes than the reflected wave of the aircraft. In addition, phase modulation is applied to the transmission power, and the Doppler frequency is gradually shifted to keep control away from the actual reflected wave in frequency.
3. Simultaneous interference control for interior type and exterior type When it is determined that the reflected wave of the airframe is no longer visible from the missile's eyes, estimated from the assumed frequency gate width of the missile, the injector 3 is the exterior type ECM device body 5 Is ejected from the aircraft.

The ejected exterior ECM apparatus body 5 freely falls and uses its own power source to amplify and transmit the received radio wave and perform phase control as instructed by the ECM controller 1 in advance. Deceived as if it were mobile. During this time, the disturbance control by the interior ECM device 2 is also continued.
4). Transition from interior type to exterior type Using the assumed missile frequency gate width value, the transmission of the interior type ECM device is cut off while radio waves from the interior type and the exterior type enter the eye of the missile at the same time. Or gradually weaken. By doing so, the missile's eyes are directed to the exterior ECM device, and control is performed to prevent threats from being attracted to the aircraft.

  FIG. 3 is a block diagram showing an embodiment of the present invention. In the figure, a configuration of an interior type ECM device and a configuration of an exterior type ECM device are shown. (1) is an interior type, and (2) is an exterior type. First, an interior type ECM apparatus will be described. In the figure, 11 is an aerial line, 12 is connected to the aerial line 11, and a transmission / reception switcher for switching transmission / reception, 17 is a small signal amplifier for receiving and amplifying a signal from the transmission / reception switcher 12, and 16 is the small signal amplifier 17. A delay line that delays the output, 15 is a phase shifter that shifts the phase by inputting a signal that has passed through the delay line 16, 14 is a switch that turns on / off the output of the phase shifter 15, and 13 is an output of the switch 14. The output of the high output amplifier that is received is input to the transmission / reception switch 12.

  Reference numeral 20 denotes a machine power supply, and 19 denotes a power supply controller that controls the power supplied to each unit in response to the output of the machine power supply 20. Reference numeral 21 denotes a control signal from the ECM controller 1. Reference numeral 18 denotes a modulation controller that receives a control signal from the ECM controller 1 and performs modulation control. An output from the modulation controller 18 is given to the switch 14 and the phase shifter 15.

  The above configuration is the same for the configuration of the exterior ECM apparatus. The difference is that the internal ECM device is supplied with power from the body power supply, whereas the external ECM device is supplied with power from the built-in power supply. Further, the type of amplifier to be used differs depending on the power of the high-power amplifier, and the interior type antenna (antenna) also serves as the antenna of the ECM controller 1.

  In the figure, 22 is an aerial line, 23 is a transmission / reception switch, 28 is a small signal amplifier, 27 is a delay line, 26 is a phase shifter, 25 is a switch, 24 is a high output amplifier, 31 is a built-in power supply, and 30 is the built-in power supply. It is a power supply controller which controls the power supply which receives the output of 31 and is supplied to each part. Reference numeral 32 denotes a parameter / control signal given from the ECM controller 1. A modulation controller 29 receives the control signal and controls the switch 25 and the phase shifter 26. An injection control unit 33 receives the parameter / control signal 32 and injects the exterior ECM device 5 (see FIG. 2) from the machine body. The injection control unit 33 corresponds to the injector 3 in FIG. The operation of the system configured as described above will be described as follows. The interior type ECM device will be described below, but the basic operation is the same for the exterior type ECM device.

  The threat radio wave input from the antenna 11 is sent from the duplexer 12 to the small signal amplifier 17. The output of the small signal amplifier 17 is phase-modulated by the phase shifter 15 via the delay line 16. In this case, the phase modulation is controlled by the modulation controller 18 by the control signal 21 from the ECM controller 1. The phase-modulated signal is amplified by the high-power amplifier 13 through the switch 14 and transmitted from the antenna 11 through the transmission / reception switch 12 to the air. The operating power at this time is supplied from the machine power source 20 and distributedly supplied to each part by the voltage controller 19.

  FIG. 4 is a block diagram showing an embodiment of the ECM controller 1. In the figure, 40 is a threat radio wave input antenna, 41 is a threat analysis unit that receives a signal input from the antenna and analyzes the threat, and 42 is a combination control unit that receives the output of the threat analysis unit 41 and performs combination control. , 43 receives an output from the combination control unit 42 and controls the interior type ECM device, and 46 similarly controls an exterior type ECM device that receives the output from the combination control unit 42. It is a device control unit. The threat radio wave input antenna 40 can also be shared with the antenna 11 (see FIG. 3) of the interior ECM device 2.

  44 is connected to the interior type ECM device control unit 43 and performs a Doppler shift control unit, and 45 similarly receives the output of the interior type ECM device control unit 43 and performs radio wave emission on / off control. An off control unit. 47 is connected to the exterior-type ECM device control unit 46, and a Doppler shift control parameter setting unit for setting Doppler shift control parameters. 48 is also connected to the exterior-type ECM device control unit 46, and launches the exterior-type ECM device body 5. It is a firing timing control part which controls the timing of. The operation of the apparatus configured as described above will be described as follows.

  First, the radio wave emitted from the threat is input from the threat radio wave input antenna 40. Then, the threat analysis unit 41 analyzes the type of radio waves, the frequency, the type of threat, and the like, and extracts parameters used for control. The combination control unit 42 that has obtained information from the threat analysis unit 41 controls the interior type ECM device control unit 43 and the exterior type ECM device control unit 46 at the same time, thereby realizing the control described in the above principle.

  The interior type ECM device control unit 43, under the control of the combination control unit 42, a Doppler shift control unit 44 that controls which definition of Doppler shift is applied to the emitted radio wave, and a radio wave that controls on / off of the radio wave emission. The firing on / off control unit 45 is controlled to realize the control shown in the above principle. The exterior type ECM device control unit 46, under the control of the combination control unit 42, a Doppler shift control parameter setting unit 47 for presetting which definition Doppler shift is applied to the emitted radio wave, and a launch timing for controlling the launch timing The control unit 48 is controlled to realize the control shown in the above principle.

  As described above, according to the present invention, the interior-type ECM device outputs a pseudo-reflected radio wave and shifts its frequency to a band separated from the band of the received radio wave, thereby making the pseudo-reflected radio wave a The frequency can be outside the frequency band, and the exterior type ECM device that emits the frequency outside the frequency band outputs the output, so that the device that performs the tracking control according to the reflected wave of the transmission radio wave can be tracked. Can be disturbed.

  Further, according to the present invention, it is possible to obstruct the tracking of a device or the like that performs tracking control according to the frequency shift direction and shift speed of the reflected wave of the transmission radio wave. Further, in the process of switching from the output of the internal ECM device to the output of the external ECM device, a period for outputting the same frequency is provided, so that the switching can be performed more smoothly. Further, in the process of switching from the output of the interior type ECM device to the output of the exterior type ECM device, the frequency can be switched without switching, so that the tracking of the device that follows the reflected radio wave can be more disturbed. it can.

  Furthermore, by performing deception by combining an interior type ECM device and an exterior type ECM device, ECM can be performed even in the case of a large machine without mobility, and it is possible to protect itself from threats. Further, by combining the interior type and the exterior type, it is possible to reduce the output power of the exterior type ECM device. Furthermore, by combining the interior mold and the exterior mold, the injection timing of the exterior mold is not a threat timing, and the mother machine can freely control.

It is a block diagram which shows one embodiment of this invention. It is a figure which shows the control timing chart of this invention. It is a block diagram which shows one embodiment of this invention. It is a block diagram which shows one embodiment of an ECM controller.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ECM controller 2 Interior type ECM apparatus 3 Injector 4 Aerial line 5 Exterior type ECM apparatus main body

Claims (3)

Starts the output of the pseudo-reflected radio wave with a frequency corresponding to the frequency of the received radio wave, then shifts the frequency of the radio wave that started the output to at least a band separated from the frequency band of the received radio wave, and then stops the output of the radio wave An internal ECM device;
Injection means for injecting an exterior ECM device;
The exterior-type ECM device that emits radio waves having a frequency in the separated frequency band that is emitted by the ejection unit;
An aircraft characterized by comprising:   2. The exterior ECM device according to claim 1, further comprising frequency shift means for giving a frequency shift of a shift direction and a shift speed similar to the shift of the frequency in the interior ECM device for the output radio wave. aircraft.   The interior-type ECM device and the exterior-type ECM device are provided with a period in which a frequency of the same frequency is output at the same time or from the same frequency as the frequency when the output of the interior-type ECM device is stopped. The aircraft according to claim 2, wherein output of radio waves from the ECM device is started.

Images