JP2003215239A - Guidance system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent degradation of accuracy of guidance to a specified hit point because of tracing a peak point of signal level when a conventional guidance system guides to a specified target, by using a range profile processed in a synthetic band and long distance disintegrated, and therefore if the vibration level varies then the trace point varies to the distance direction. <P>SOLUTION: The velocity information of the target is received externally. When the trace point is specified from the long distance disintegrated range profile by calculating the prediction distance of the target based on the information, and by applying a correction according to the prediction distance, the trace point of the target is stabilized and guidance performance to the specified hit point is improved. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention performs synthetic band processing on a reflection signal from a target and guides it to a hit point (vulnerability point) of a designated target by using a range profile highly resolved in the distance direction. The present invention relates to an induction device.

[0002]

2. Description of the Related Art FIG. 9 shows the structure of a conventional guiding device. Reference numeral 1 is a guide device, 2 is a local oscillator that outputs a transmission frequency signal and a local signal according to internal settings, 3 is a transmitter that amplifies the transmission frequency signal and outputs the transmission signal, and 4 is a switch between the transmission signal and the reception signal. A transmission / reception switching unit, 5 is an antenna unit that radiates a transmission signal as a transmission wave into space and receives a reflection signal from a target, and 6 is a frequency conversion of a reception signal received by the antenna unit by a local signal from a local oscillation unit,
A reception unit that amplifies and outputs a video signal, 7 is an A / D conversion unit that converts the video signal into a digital signal, 8 is a target detection unit that detects a target to be tracked from the digital signal, and 9 is a reverse frequency calculation of the digital signal Then, a synthesis band unit for calculating a range profile highly decomposed in the distance direction, 10 is a tracking point determination unit for selecting a target tracking point from the range profile of the target decomposed at high distance, and 11 is tracking for the selected target. An angle detection unit for detecting angle information about a point, 12
Is a guidance signal calculation unit that outputs a guidance signal for guiding the flying object toward the target tracking point.

FIG. 10 shows an operation diagram. 1 is a guiding device, M is a flying body equipped with the guiding device 1, T is a target,
P is an external information transmission unit. In order to capture and track the target, the flying vehicle M equipped with the guidance device 1 amplifies the transmission frequency signal output from the local oscillator 2 in FIG. The radio wave is transmitted from the antenna unit 5 via 4. The reflected signal from the target T is received by the antenna unit 5, and the frequency signal is converted and amplified by the local signal output from the local oscillating unit 2 in the receiving unit 6 via the transmission / reception switching unit 4 and the video signal is output. To do. After that, it is converted into a digital signal by the A / D converter 7,
The target detection unit 8 performs target detection, and the synthesis band unit 9 calculates the inverse frequency of the digital signal to calculate a range profile highly resolved in the distance direction. Tracking point determination unit 10
Then, the tracking point of the target T is selected from this range profile, the angle detection unit 11 detects the angle information with the tracking point of the selected target T, and the guidance signal calculation unit 12 detects the flying object M. A guidance signal for guiding the target toward the tracking point of the target T is output. Through this series of processing, the flying body M equipped with the guiding device 1 is guided toward the target T.

[0004]

In the conventional induction device as described above, the signal level of the range profile which is the output of the synthesis band unit 9 is as shown in FIGS. 11 (a), 11 (b) and 11 (c). If the peak point of the signal level is selected as the target tracking point when it fluctuates over time, the tracking point will fluctuate in the distance direction from time to time, thus deteriorating the guidance performance of the designated target to the hit point. There is a problem.

In order to solve the above problems, the present invention specifies a tracking point of a target so that it does not change in the distance direction when the tracking point is selected on a range profile decomposed into a high distance. It is possible to improve the guidance performance of the target to the hit point.

[0006]

According to a first aspect of the present invention, there is provided an induction device including a local oscillator for outputting a transmission frequency signal and a local signal, and a transmitter for amplifying the transmission frequency signal and outputting the transmission signal. And a transmission / reception switching unit that switches the transmission signal and the reception signal, an antenna unit that transmits the transmission signal to space and receives a reflection signal from the target, and a local oscillation that outputs the reflection signal from the target from the local oscillation unit. A receiving unit that frequency-converts and amplifies a signal to output a video signal, an A / D conversion unit that converts this video signal into a digital signal, a target detection unit that detects a target to be tracked from the digital signal, and a digital signal A tracking point is selected from the synthetic band part that performs inverse frequency calculation and calculates a highly resolved range profile in the distance direction, and the target range profile obtained by this high range resolution. A tracking point determination unit, an angle detection unit that detects angle information with respect to the tracking point of the selected target, and a guidance signal for guiding the flying body toward the target tracking point based on this angle information. In a flying vehicle guidance device including a guidance signal calculation unit, an integration unit that integrates signals subjected to combined band processing is provided, and by averaging target signal levels, it is possible to suppress tracking points from varying in the distance direction, It has means to improve the guidance performance of the designated target to the hit point.

According to a second aspect of the invention, in the induction device, a transmission frequency signal and a local oscillating unit for outputting a local signal are internally set, a transmission unit for amplifying the transmission frequency signal and outputting the transmission signal, and the transmission signal. A transmission / reception switching unit that switches the reception signal, an antenna unit that transmits the transmission signal to the space and receives a reflection signal from the target, and a frequency conversion and amplification of the reflection signal from the target with the local oscillation signal output from the local oscillation unit. To output a video signal, an A / D conversion unit to convert the video signal into a digital signal, a target detection unit to detect a target to be tracked from the digital signal, and an inverse frequency operation of the digital signal to calculate a distance. A synthetic band part for calculating a range profile highly decomposed in the direction, and a tracking point determination part for selecting a tracking point from the target range profile decomposed at a high distance. It consists of an angle detection unit that detects angle information for the selected target tracking point, and a guidance signal calculation unit that outputs a guidance signal for guiding the flying object toward the target tracking point based on this angle information. In the flight guidance device, the external communication unit receives the target speed information transmitted from the outside, and the speed correction calculation unit calculates the predicted distance of the target using this speed information, and the target tracking point. By adding velocity correction to the determination, it is possible to suppress the tracking point from changing in the distance direction, and to improve the guidance performance of the designated target to the hit point.

A guiding device according to a third aspect of the present invention is configured such that a transmission frequency signal and a local oscillation unit for outputting a local signal are internally set, a transmission unit for amplifying the transmission frequency signal and outputting the transmission signal, and the transmission signal. A transmission / reception switching unit that switches the reception signal, an antenna unit that transmits the transmission signal to the space and receives a reflection signal from the target, and a frequency conversion and amplification of the reflection signal from the target with the local oscillation signal output from the local oscillation unit. To output a video signal, an A / D conversion unit to convert the video signal into a digital signal, a target detection unit to detect a target to be tracked from the digital signal, and an inverse frequency operation of the digital signal to calculate a distance. A synthetic band part for calculating a range profile highly decomposed in the direction, and a tracking point determination part for selecting a tracking point from the target range profile decomposed at a high distance. It consists of an angle detection unit that detects angle information for the selected target tracking point, and a guidance signal calculation unit that outputs a guidance signal for guiding the flying object toward the target tracking point based on this angle information. In the flight guidance device, the target detection unit output before high-range decomposition in the synthesis band unit is used to provide a speed calculation unit that calculates the rate of change over time of the target distance. By calculating the predicted distance and adding speed correction when determining the target tracking point, it is possible to suppress the tracking point from changing in the distance direction,
It has means to improve the guidance performance of the designated target to the hit point.

A guiding device according to a fourth aspect of the present invention is configured such that a transmission frequency signal and a local oscillation unit for outputting a local signal are internally set, a transmission unit for amplifying the transmission frequency signal and outputting the transmission signal, and the transmission signal. A transmission / reception switching unit that switches the reception signal, an antenna unit that transmits the transmission signal to the space and receives a reflection signal from the target, and a frequency conversion and amplification of the reflection signal from the target with the local oscillation signal output from the local oscillation unit. To output a video signal, an A / D conversion unit to convert the video signal into a digital signal, a target detection unit to detect a target to be tracked from the digital signal, and an inverse frequency operation of the digital signal to calculate a distance. A synthetic band part for calculating a range profile highly decomposed in the direction, and a tracking point determination part for selecting a tracking point from the target range profile decomposed at a high distance. It consists of an angle detection unit that detects angle information for the selected target tracking point, and a guidance signal calculation unit that outputs a guidance signal for guiding the flying object toward the target tracking point based on this angle information. In the flight guidance device, the velocity calculation unit that calculates the rate of change over time of the target distance by using the output of the target detection unit that has not been decomposed at high distances in the synthesis band unit, and the high-frequency component of the velocity calculation result is removed. A filter unit having a low-pass filter for
By calculating the predicted distance of the target in the speed correction calculation unit and adding speed correction when making the target tracking point determination, it is possible to suppress the tracking point from changing in the distance direction, and to reach the hit point of the specified target. It has means for improving the induction performance.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is a block diagram showing a first embodiment of the present invention, 13 is an integrating unit, and 1 to 12 are the same as those in FIG. 9 of the conventional description. The integrating unit 13 integrates the output signal of the synthesis band unit 9 and averages the signal level.

This operation will be described with reference to FIGS. 1, 5 and 10. The operation is the same as the conventional operation except for the integrating unit 13 in the configuration diagram of FIG. In the operation diagram of FIG. 10, the flying body M equipped with the guidance device 1 tracks the target T and flies. At this time, the range profile decomposed over a long distance in the synthesis band unit 9 is subjected to integration processing in the integration unit 13 so that the signal levels of the respective range profiles are averaged, and FIG. 5 (a) → (b) → ( As shown in c), the level fluctuation with time decreases. As a result, even if the tracking point determination unit 10 selects the target tracking point as the peak of the signal level, the tracking point is less likely to change in the distance direction and is stable against the hit point of the designated target. Can be guided.

Embodiment 2. 2 is a configuration diagram showing a second embodiment of the present invention, 14 is an external communication unit, 15 is a speed correction calculation unit, and 1 to 12 are the same as those in FIG. 9 of the conventional description. The external communication unit 14 receives target speed information communicated from the outside, and the speed correction calculation unit 15 calculates a speed correction amount from the target speed information received by the external communication unit 14 and selects a target tracking point. In that case, correction is added.

This operation will be described with reference to FIGS. 2, 10 and 6. 2 is the same as the conventional operation except for the external communication unit 14 and the speed correction calculation unit 15 in the configuration diagram of FIG. Figure 10
In the operation diagram of, the flying body M equipped with the guidance device 1
Will follow the target T and fly. At this time, the range profile decomposed over a long distance in the synthesis band unit 9 is as shown in FIG.
As shown in (a) → (b) → (c), it changes with the passage of time. At this time, the external communication unit 14 receives the speed information of the target T transmitted from the external information transmission unit P, the speed correction calculation unit 15 calculates the predicted distance of the target T, and the predicted distance is used as the center. Set the gate on the range profile. In the range profile of the target T shown in FIG. 6A, when the hit point is designated as the A point, in the range profile (b) after Δt 1 second, a gate centering on the predicted distance is set as shown in the figure. Then, the tracking point determination unit 10 selects the peak cell (point A) in this gate as the tracking point. In the range profile (c) after the next Δt 2 seconds, similarly, a gate centering on the predicted distance is set,
The peak cell (c point) in this is selected as the tracking point.

With such a configuration, when the signal level of the range profile fluctuates, the peak point in the entire target is conventionally tracked, so the tracking point fluctuates in the distance direction. By performing speed correction, it becomes possible to stabilize the tracking point and improve the guidance performance of the designated target to the hit point.

Embodiment 3. FIG. 3 is a block diagram showing a third embodiment of the present invention, in which 16 is a speed calculator.
9 to 15 are the same as those in the conventional description, and 15 is the same as that in FIG. The speed calculation unit 16 calculates the time change rate of the target distance using the target detection result of the target detection unit 8 to calculate the relative speed to the target, and the speed correction calculation unit 15 causes the speed calculation unit 16 to calculate the relative speed. The predicted distance of the target is calculated from the calculation result of, and the correction is added when the target tracking point is selected.

This operation will be described with reference to FIGS. 3, 7 and 10. In the configuration diagram of FIG. 3, except for the speed correction calculation unit 15 and the speed calculation unit 16, the operation is the same as the conventional operation. Figure 10
In the operation diagram of, the flying body M equipped with the guidance device 1
Will follow the target T and fly. At this time, the range profile decomposed by the synthesis band unit 9 at a high distance is shown in FIG.
As shown in (a) → (b) → (c), it changes with the passage of time. At this time, in the speed calculation unit 16, the target detection unit 8
The rate of change of the target distance over time is calculated from the output of ## EQU1 ## and the speed correction calculator 15 calculates the predicted distance of the target T, and the gate centered on this predicted distance is set on the range profile. In the range profile of the target T shown in FIG. 7A, when the hit point is designated as the A point, in the range profile (b) after Δt 1 second, a gate centering on the predicted distance is set as shown in the figure. Then, the tracking point determination unit 10 selects the peak cell (point A) in this gate as the tracking point. In the range profile (c) after the next Δt 2 seconds, similarly, a gate centering on the predicted distance is set,
The peak cell (c point) in this is selected as the tracking point.

With such a configuration, when the signal level of the range profile fluctuates, the peak point in the entire target has been tracked conventionally, so the tracking point fluctuates in the distance direction. By performing speed correction, it becomes possible to stabilize the tracking point and improve the guidance performance of the designated target to the hit point.

Embodiment 4. 4 is a block diagram showing a fourth embodiment of the present invention, in which 17 is a filter section,
9 to 15 are the same as those in the conventional description, 15 is the same as FIG. 2, and 16 is the same as FIG. The speed calculation unit 16 includes the target detection unit 8
Using the target tracking result in step 1, the rate of change of the target distance with time is calculated, the relative speed to the target is calculated, and the filter unit 17
Removes the high frequency component of the calculation result of the speed calculation unit 16,
The speed correction calculation unit 15 calculates the predicted distance of the target tracking point from the output of the filter unit 17, and adds a correction when selecting the target tracking point.

This operation will be described with reference to FIGS. 4, 8 and 10. 4 is the same as the conventional operation except for the speed correction calculator 15, the speed calculator 16, and the filter 17. In the operation diagram of FIG. 10, the flying body M equipped with the guidance device 1 tracks the target T and flies. At this time, the range profile decomposed by the synthesis band unit 9 at a high distance is shown in FIG. 8 (a) → (b) →
Transition to (c). At this time, the speed calculation unit 16 calculates the time change rate of the target distance from the output of the target detection unit 8,
By passing the output through the low-pass filter of the filter unit 17, the high-frequency component that is the variation error of the output result is removed, the speed correction calculation unit 15 calculates the predicted distance of the target T, and the predicted distance is the center. Set the gate on the range profile. In the range profile of the target T shown in FIG. 8A, when the hit point is designated as the A point, Δ
In the range profile (b) after t1 seconds, a gate centering on the predicted distance is set as shown in the figure, and the tracking point determination unit 10 selects the peak cell (a point) in this gate as the tracking point. To do. Similarly, in the next range profile (c) after Δt 2 seconds, a gate centering on the predicted distance is set and the peak cell (point c) therein is selected as the tracking point.

By adopting such a configuration, when the signal level of the range profile fluctuates, the peak point in the entire target has conventionally been tracked, so the tracking point fluctuates in the distance direction. By performing speed correction, it becomes possible to stabilize the tracking point and improve the guidance performance of the designated target to the hit point.

[0021]

According to the first aspect of the present invention, by reducing the fluctuation of the target signal, the fluctuation of the tracking point in the distance direction is reduced, and compared with the conventional guiding device, the hit point of the designated target can be achieved. The induction performance of is improved.

According to the second aspect of the present invention, the velocity of the target tracking point is corrected, so that the variation of the tracking point in the distance direction is reduced, and the specified target hit point to the hit point is reduced as compared with the conventional guiding device. Induction performance is improved.

According to the third aspect of the invention, the velocity of the target tracking point is corrected, so that the variation of the tracking point in the distance direction is reduced, and the specified target hit point to the hit point is reduced as compared with the conventional guidance device. Since the guiding performance is improved and speed information from the outside is not required, the hardware configuration can be simplified as compared with the second invention.

According to the fourth aspect of the invention, the velocity of the target tracking point is corrected by using the highly accurate velocity information obtained by the low-pass filter processing, so that the variation of the tracking point in the distance direction is reduced, and the third aspect of the invention is provided. The ability to guide the designated target to the hit point is improved compared to.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a guiding device according to the present invention.

FIG. 2 is a diagram showing a second embodiment of a guiding device according to the present invention.

FIG. 3 is a diagram showing Embodiment 3 of the guiding device according to the present invention.

FIG. 4 is a diagram showing Embodiment 4 of the guiding device according to the present invention.

FIG. 5 is a diagram showing target signal and tracking point determination according to the first embodiment.

FIG. 6 is a diagram showing a target signal and tracking point determination according to the second embodiment.

FIG. 7 is a diagram showing a target signal and tracking point determination according to the third embodiment.

FIG. 8 is a diagram showing target signal and tracking point determination according to the fourth embodiment.

FIG. 9 is a diagram showing a conventional guidance device.

FIG. 10 is a diagram showing the operation of the guidance device.

FIG. 11 is a diagram showing conventional target signal and tracking point determination.

[Explanation of symbols]

1 induction device, 2 local oscillators, 3 transmitters, 4
Transmission / reception switching unit, 5 antenna unit, 6 receiving unit, 7
A / D conversion unit, 8 target detection unit, 9 synthetic band unit,
10 tracking point determination unit, 11 angle detection unit, 12
Guidance signal calculation unit, 13 integration unit, 14 external communication unit, 15 speed correction calculation unit, 16 speed calculation unit, 1
7 Filter section, M flying object, T target, P
Information transmission department P

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Nonaka Shinbo             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. F term (reference) 2C014 DA02 DB01 DD02 DD11 DD14                 5J070 AC02 AE02 AF07 AH19 AH35                       AH39 AK22 BB06

Claims (4)

[Claims] 1. A local oscillator that outputs a transmission frequency signal and a local signal according to internal settings, a transmitter that amplifies the transmission frequency signal and outputs a transmission signal, and a transmission / reception switching unit that switches the transmission signal and the reception signal. And an antenna unit that transmits a transmission signal to the space and receives a reflection signal from a target, and outputs a video signal by frequency-converting and amplifying the reflection signal from the target with a local oscillation signal output from a local oscillation unit. A receiver and A / that converts this video signal to a digital signal
A D conversion unit, a target detection unit that detects a target to be tracked from a digital signal, a synthesis band unit that calculates a reverse frequency of a digital signal, and calculates a range profile highly decomposed in the distance direction, and this high-distance decomposed unit. A tracking point determination unit that selects a target tracking point from the target range profile, an angle detection unit that detects angle information with respect to the selected target tracking point, and a flying object based on this angle information A guiding device for a flying object, which comprises a guiding signal calculation unit for outputting a guiding signal for guiding toward a target, characterized by comprising an integrating unit for integrating the signal subjected to the synthetic band processing. 2. A local oscillator that outputs a transmission frequency signal and a local signal according to internal settings, a transmitter that amplifies the transmission frequency signal and outputs a transmission signal, and a transmission / reception switching unit that switches between the transmission signal and the reception signal. And an antenna unit that transmits a transmission signal to the space and receives a reflection signal from a target, and outputs a video signal by frequency-converting and amplifying the reflection signal from the target with a local oscillation signal output from a local oscillation unit. A receiver and A / that converts this video signal to a digital signal
A D conversion unit, a target detection unit that detects a target to be tracked from a digital signal, a synthesis band unit that calculates a reverse frequency of a digital signal, and calculates a range profile highly decomposed in the distance direction, and this high-distance decomposed unit. A tracking point determination unit that selects a target tracking point from the target range profile, an angle detection unit that detects angle information with respect to the selected target tracking point, and a flying object based on this angle information In the flying device guidance device including a guidance signal calculation unit that outputs a guidance signal for guiding toward, the external communication unit that obtains target speed information from the outside and the speed correction amount calculated from this speed information A guidance device comprising a speed correction calculation unit for outputting to a tracking point determination unit. 3. A local oscillator that outputs a transmission frequency signal and a local signal by internal settings, a transmitter that amplifies the transmission frequency signal and outputs a transmission signal, and a transmission / reception switching unit that switches the transmission signal and the reception signal. And an antenna unit that transmits a transmission signal to the space and receives a reflection signal from a target, and outputs a video signal by frequency-converting and amplifying the reflection signal from the target with a local oscillation signal output from a local oscillation unit. A receiver and A / that converts this video signal to a digital signal
A D conversion unit, a target detection unit that detects a target to be tracked from a digital signal, a synthesis band unit that calculates a reverse frequency of a digital signal, and calculates a range profile highly decomposed in the distance direction, and this high-distance decomposed unit. A tracking point determination unit that selects a target tracking point from the target range profile, an angle detection unit that detects angle information with respect to the selected target tracking point, and a flying object based on this angle information In the flight guidance device consisting of the guidance signal calculation unit that outputs the guidance signal for guiding toward the target, the velocity calculation unit that calculates the time change rate of the target distance from the output result of the target detection unit, and from this result A guiding device comprising a speed correction calculation unit that calculates a speed correction amount and outputs the calculated speed correction amount to the tracking point determination unit. 4. A local oscillator that outputs a transmission frequency signal and a local signal according to internal settings, a transmitter that amplifies the transmission frequency signal and outputs a transmission signal, and a transmission / reception switching unit that switches between the transmission signal and the reception signal. And an antenna unit that transmits a transmission signal to the space and receives a reflection signal from a target, and outputs a video signal by frequency-converting and amplifying the reflection signal from the target with a local oscillation signal output from a local oscillation unit. A receiver and A / that converts this video signal to a digital signal
A D conversion unit, a target detection unit that detects a target to be tracked from a digital signal, a synthesis band unit that calculates a reverse frequency of a digital signal, and calculates a range profile highly decomposed in the distance direction, and this high-distance decomposed unit. A tracking point determination unit that selects a target tracking point from the target range profile, an angle detection unit that detects angle information with respect to the selected target tracking point, and a flying object based on this angle information In a flight guidance device that includes a guidance signal calculation unit that outputs a guidance signal for guiding toward a target, a velocity calculation unit that calculates the time change rate of the target distance from the output result of the target detection unit, and this velocity calculation A filter unit that removes high-frequency components from the output result of the unit by a low-pass filter, and a speed correction calculation unit that calculates a speed correction amount from this result and outputs the calculated amount to the tracking point determination unit. Induction apparatus, characterized in that the.