JPH0894293A - Method and apparatus for guiding airframe - Google Patents

Abstract

PURPOSE: To obtain target position information without support of radio wave, radar, etc., in a passive infrared ray image guiding system. CONSTITUTION: The direction of a target 1 is confirmed by an optical searcher 6, guided missiles 2, 3 are shot by a shooting unit 5 toward the direction, and controlled to be flown by using an inertial navigation method. The missiles 2, 3 exchanges data (position, speed, attitude, target direction angle, etc.,) to each other via a data link 4 on the way, and a distance to the target is calculated by an arithmetic unit. When the position of the target is obtained, the optimum flying route to the target is calculated based on it, and homing guidance is conducted along the optimum flying route.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for guiding a flying object, and more particularly to a guiding method and apparatus using a passive infrared image guiding apparatus for detecting and guiding infrared rays emitted from a target.

[0002]

2. Description of the Related Art The passive infrared image guidance system is well known as a system that performs homing guidance by detecting infrared rays emitted from a target, but in this guidance system, distance information from the target cannot be obtained. Therefore, the distance information is obtained by active means such as radar for initial parameter setting for optimum guidance and parameter setting for the first mid-term inertial guidance in operation at medium and long range,
It was necessary to predict the meeting point (for example, Japanese Patent Laid-Open No. 1-25
6799 gazette).

[0003]

This conventional guidance system has a problem that an attack on a target is detected by the use of a radar and the ECM or the like as a defense means against the attack cannot sufficiently exhibit its function.

[0004]

In order to solve the above problems, the present invention has established a guidance system for obtaining distance information to a target without using a conventional radar or the like. That is, using a plurality of flying objects, first, the plurality of flying objects are made to fly toward a predetermined target direction by inertial navigation. Then, in the middle of reaching the target, data including at least the position of the flying object and the target direction angle are exchanged between the flying objects, the distance to the target is calculated based on the data, and the target is calculated based on the calculated distance. Identify. After that, the infrared rays emitted from the target are detected to perform homing guidance to reach the target.

[0005]

The data including at least the position of the flying object and the target direction angle can be exchanged between the plurality of flying objects, and the distance information to the target can be obtained from this data based on the principle of triangulation.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, 1
Is a target, and 2 and 3 are projectiles flying toward the target 1. The number of flying bodies 2 and 3 is not limited to two and may be more. Reference numeral 4 is a data link that mediates communication between the flying objects 2 and 3, 5 is a launch pad for launching the flying objects 2 and 3, and 6 is an optical search device for searching the direction of the target 1.

The optical search device 6 is not an active device that emits a laser or the like to catch the target 1, but is a passive device that can detect the whereabouts of the target by receiving light, infrared rays, or the like received from the target. For example, binoculars, a telescope, an infrared telescope, an infrared camera, etc. are used.

FIG. 2 is a block diagram showing the structure of the flying object, but in the figure, the propelling portion of the flying object and the like are omitted. In FIG. 2, the passive infrared image guiding device 7 is
This is a device that detects infrared rays radiated from the target 1 and guides the flying bodies 2 and 3 to the target 1. This device is already well known (see, for example, Japanese Patent Publication No. 61-12569). The inertial navigation device 8 is also a well-known device, and is composed of, for example, a gyro, an accelerometer, a computer, etc.
The attitude, the position, the traveling direction, etc. are calculated, and the projectiles 2 and 3 are guided toward the target 1 along the given route. The transmission processing device 10 transmits the flying object 2, via the data link 4.
The three communicate with each other such as the position, speed, attitude, and azimuth of the target 1 with respect to the machine axis. The arithmetic unit 9 is composed of, for example, a computer or the like, and based on the data from the passive infrared image guiding device 7 and the inertial navigation device 8 and the data of the other flying vehicle from the transmission processing device 10,
The distance to the target and the flight path of the optimum flight are calculated.

Next, the operation of the embodiment will be described with reference to the flowchart of FIG. First, the operator identifies the target 1 by the optical search device (for example, the telescope) 6 and obtains the azimuth information of the target 1 (101). This work is carried out manually, but of course it may be mechanized. Next, each flying body 2,
The azimuth information of the target 1 is input to the inertial navigation device 8 of No. 3, the projectiles 2 and 3 are simultaneously launched, and the aircraft is made to fly in the direction of the target 1 by inertial navigation (102). Then, the passive infrared image guiding apparatus 7 in each of the flying bodies 2 and 3 starts searching for the target 1 and automatically locks on the target when the target 1 can be detected (103). The flying bodies 2 and 3 change their flight paths by inertial navigation within a range where lock-on can be maintained (104). This is for separating the flying objects 2 and 3 so that the distance between the flying objects can be calculated. Furthermore, the data link 4 allows data (position, position,
After exchanging the speed, the posture, the target direction, etc.), the arithmetic unit 9 evaluates the position of the target 1 from the data of the opponent's flying object and the data of the own aircraft (105). That is, each flying body 2, 3
Since the position of and the azimuth angle to the target 1 are known,
Goal 1 by the principle of triangulation based on these data
The position (distance) of can be calculated.

The data link 4 uses, for example, a radio wave as a medium. However, since it is for communication between flying objects, it is sufficient if the flying objects have directivity in the direction. Then, by not having directivity in the target direction, it is possible to improve the anti-jamming property.

Next, the result of the position evaluation for each flying object is collated, and after confirming that the target 1 is correctly locked on, the optimum flight path to the target 1 is calculated (106).
You can take various flight paths until you reach the target, but in general, if you went straight to the target,
Since it is detected by the radar network or the like on the other side, for example, there may be a case where a low altitude flight is continued near the sea surface and a steep rise is made in the immediate vicinity of the target to reach the target. A route according to other situations is considered, and the optimum route among them is calculated by the arithmetic unit 9. The calculation program at this time is stored in the calculation device 9 in advance.

When the optimum flight route is determined, Homin guidance is performed along the route while correcting the error by a command from the guidance device 7 (107). Then, each flying object independently reaches the target by homing guidance (10
8). It is also possible to maintain the accuracy of the target evaluation by periodically calculating and collating the target position even during homing guidance.

With the above arrangement, the distance information to the target can be obtained without using an active method such as radar, and it is difficult for the opponent to detect the launch. Further, the optimum flight route can be determined based on the distance information. Further, since the target distinguishability is improved by adding the distance information, it is possible to improve the interference resistance. Moreover, since multiple projectiles are fired at the same time, the hit probability increases.

Note that the data link 4 can also be configured as a link with a command base including the optical search device 6, and if so, the flight route and the target are changed, and distance information regarding the target is obtained. It is possible to expand the operability.

[0015]

As described above, according to the present invention,
It is difficult for the other party to detect the launch, and by adding the distance information, it is possible to improve the target discrimination and thus the anti-jamming property. Furthermore, since multiple projectiles are fired at the same time, the probability of hitting is improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a guiding device.

FIG. 3 is a flowchart illustrating the operation of the embodiment.

[Explanation of symbols]

 1 Target 2, 3 Flying Body 4 Data Link 5 Launcher 6 Optical Search Device 7 Passive Infrared Image Guidance Device 8 Inertial Navigation Device 9 Arithmetic Device 10 Transmission Processing Device

Claims (3)

[Claims] 1. Flying a plurality of flying objects toward a predetermined target direction by inertial navigation, exchanging data including at least the position of the flying object and the target direction angle between the flying objects on the way to the target, The distance to the target is calculated based on the data of the plurality of flying objects, the target is identified based on the calculated distance, and then the infrared rays emitted from the target are detected to perform homing guidance. Method. 2. A guidance device installed in each of a plurality of flying objects, the inertial navigation device for flying the flying object toward a predetermined target direction, and at least the self-other flight between the other flying object. A transmission processing device that exchanges data including a body position and a target azimuth angle, a calculation device that calculates a distance to the target based on the data and identifies the target, and a homing process by detecting infrared rays emitted from the target. And a passive infrared image guiding device for guiding the flying object guiding device. 3. The calculation device calculates an optimum flight path to a target based on a distance to the target in the previous period.
The guidance device according to.