Design method of hypersonic moving target simulation device for scaling test scene

Abstract

The invention discloses a design method of a hypersonic moving target simulation device for a scaled test scene, which comprises the following steps of: projecting a target shape onto a curtain at a high speed by using laser equipment, a rotating mirror system and the curtain through rotating mirror parameter design, laser parameter design and simulation target shape design of the target simulation device; and a serialized target motion track is generated, and motion state simulation of the hypersonic moving target under a high-speed flight condition is realized. The simulation device provided by the invention is simple in structure, simplified in use process, low in control difficulty and low in test cost, has flexibility and customizability, can accurately simulate the motion state of the hypersonic speed target so as to improve the test efficiency and accuracy of the superspeed target, and has a wide application prospect.

Description

Technical Field

[0001] The present invention belongs to the technical field of hypersonic target detection, and in particular relates to a design method for a hypersonic moving target simulation device for a scaled test scenario. Background Art

[0002] Hypersonic targets generally refer to moving targets based on hypersonic flight technology and flying at speeds exceeding five times the speed of sound. From the characteristics of hypersonic targets, it can be seen that their difficulty in defense is mainly reflected in the difficulty of detection and identification. In view of the current application background and technical challenges of hypersonic target detection and identification, the existing ground-based early warning system is difficult to meet the detection and identification needs of fast zoom stabilization pointing, and it is urgent to carry out research on hypersonic target detection equipment.

[0003] The high-speed motion simulator is a device that can simulate the high-speed motion of a target. The key technology is how to make the target actuator perform high-precision high-speed motion according to the preset trajectory. It is widely used in scientific research, engineering, research and development and other fields. The high-speed motion simulator can be used in various high-speed motion scenarios to test, evaluate and improve the system. It plays an important role in improving the overall performance of the system, reducing the number of physical tests of the system, shortening the development cycle, saving development funds, etc. It provides strong support for training and system development, and provides a safe and economical means for system development and performance improvement.

[0004] In view of the development needs of hypersonic target detection equipment, the hypersonic target test scenario is complex and the test cost is high. In the development and test stage of hypersonic target detection equipment, it is very necessary to use a hypersonic motion simulation device to assist in testing and verification. However, traditional target motion simulation devices usually use rigid connecting rods to drive target actuators, but this method has problems such as complex structure, many intermediate transition links, difficulty in precise control and limited simulation speed. Therefore, in response to the research needs of hypersonic target detection technology, it is necessary to develop a new type of high-speed motion simulation device that can simplify the structure and use process of the target motion simulation device and reduce the control difficulty; in addition, a hypersonic target refers to a moving target with a flight speed exceeding 5 times the speed of sound and a flight speed higher than 1700m / s. Therefore, it is necessary to increase the movement speed of the simulated target and realize the simulation of the motion state of the hypersonic target under high-speed flight conditions, so as to provide equipment support for the research of hypersonic target detection technology. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the present invention provides a method for designing a hypersonic moving target simulation device for a scaled test scenario, using laser equipment, a rotating mirror system and a screen, through the target simulation device rotating mirror parameter design, laser parameter design and simulated target shape design, the target shape is projected onto the screen at high speed, a serialized target motion trajectory is generated, and the motion state simulation of the hypersonic moving target under high-speed flight conditions is realized. The simulation device proposed by the present invention has a simple structure, a simplified use process, low control difficulty, low test cost, flexibility and customizability, can accurately simulate the motion state of the hypersonic target, thereby improving the test efficiency and accuracy of the hypersonic target, and has broad application prospects.

[0006] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0007] Step 1: Design of the rotating mirror parameters of the simulation device;

[0008] According to the requirements of the simulated target speed index, the mirror parameters are designed; when the simulated target speed index is V, the motion speed of the image projected onto the screen is:

[0009] V=ωr=2πrf (1)

[0010] Wherein, ω represents the angular velocity of the rotating mirror, r is the laser transmission distance between the laser light source and the rotating mirror, and f represents the rotating mirror frequency;

[0011] Step 2: Simulation device laser parameter design;

[0012] The laser beam divergence angle is θ. After passing through a transmission path with a distance of r, it reaches the simulated target receiving screen, forming a simulated target with a diameter of d.

[0013] Among them, the laser light source beam divergence angle is:

[0014]

[0015] Step 3: Simulate target shape design;

[0016] Install a mask plate in front of the laser device to achieve a high similarity between the simulated target and the real target shape;

[0017] Step 4: Equipment debugging;

[0018] The hypersonic moving target simulation device, which consists of a rotating mirror with a rotation speed of ω and a frequency of f, a laser light source with a beam divergence angle of θ, and a curtain at a distance of r, is debugged to realize the simulation of a moving target with a caliber of d and a flight linear velocity of V.

[0019] The beneficial effects of the present invention are as follows:

[0020] The invention discloses a design method for a hypersonic moving target simulation device for a scaled test scenario, which uses a laser device, a rotating mirror system and a curtain, and realizes the motion state simulation of a hypersonic moving target under high-speed flight conditions by designing the rotating mirror parameters of the simulation device, the laser parameters of the simulation device and the simulated target shape. The device has a simple structure, a simplified use process, low control difficulty and low test cost, and can accurately simulate the motion state of the target, so that the hypersonic target detection device can fully expose potential problems during the test phase, thereby improving the test efficiency and accuracy of the hypersonic target detection device; the hypersonic moving target simulation device is also flexible and customizable, and can realize the adjustment of the simulated target shape and the flight speed by adjusting the rotating mirror parameters, the laser parameters, the simulated target shape and the distance between the components, so as to simulate the motion state of the hypersonic target in a variety of application scenarios, and provide strong support for the development of hypersonic target detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a diagram showing the composition of a hypersonic moving target simulation device;

[0022] Figure 2 This is a schematic diagram of the scenario of a hypersonic moving target simulation device;

[0023] Figure 3 It is a schematic diagram of laser light source transmission;

[0024] Figure 4 This is a diagram of a hypersonic moving target simulation device. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] The present invention aims to achieve the design and development of a hypersonic moving target simulation device and provide a target simulation device for the development of hypersonic target detection technology.

[0027] In order to solve the above technical problems, the present invention proposes a design method for a hypersonic moving target simulation device for a scaled test scenario, and the present invention specifically includes the following contents.

[0028] The hypersonic moving target simulation device is as follows Figure 1 As shown, it includes laser equipment, a rotating mirror system, and a curtain. The working principle of the hypersonic moving target simulation device is as follows: the laser equipment projects the outline of the high-speed moving target onto the reflective surface of the rotating mirror system, and the high-speed rotation of the rotating mirror system is controlled by the control unit. The high-speed rotation of the rotating mirror system projects the outline of the moving target onto the curtain to simulate the flight of the hypersonic moving target. The scene of the hypersonic moving target simulation device is shown in the attached figure. Figure 2As shown, the environment is an outdoor normal temperature and pressure environment. The hypersonic moving target simulation device projects the target shape onto the screen at high speed to generate a serialized target motion trajectory for simulating the high-speed motion of the target.

[0029] In order to be able to identify hypersonic targets from interference targets, the hypersonic moving target simulation device needs to be able to simulate a variety of interference targets, such as space shuttles, hypersonic aircraft, etc., and the target type can be changed by controlling the target image projected by the laser device to the rotating mirror system. In addition, since the color of the sky changes with time and weather, hypersonic targets may be in different backgrounds in different weather. Therefore, the hypersonic moving target simulation device is required to simulate a variety of target backgrounds, including but not limited to rainy white backgrounds and clear blue backgrounds, etc. Different backgrounds can be achieved by changing the color of the curtain or changing the wavelength of the laser device.

[0030] At the same time, in order to improve the recognition accuracy, the hypersonic moving target simulation device needs to accurately simulate the shape of the target, so that the simulated target image is close to the scaled-down real target shape image. The high similarity between the simulated target and the real target can be achieved by accurately designing the mask of the laser equipment. The specific design steps are as follows:

[0031] Step 1: Design the parameters of the rotating mirror of the simulation device. Design the parameters of the rotating mirror according to the simulation target speed index requirements. When the simulation target speed index is V, the movement speed of the image projected on the screen is:

[0032] V=ωr=2πrf (1)

[0033] Among them, ω represents the angular velocity of the rotating mirror, r is the laser transmission distance between the laser light source and the rotating mirror, and f represents the rotating mirror frequency. The rotating mirror parameters are designed according to the requirements of the hypersonic target speed index and the size of the test site.

[0034] Step 2: Design of laser parameters of the simulation device. Figure 3 The figure shows a schematic diagram of laser light source transmission. The laser beam divergence angle is θ. After passing through a transmission path with a distance of r, it reaches the simulated target receiving curtain to form a simulated target with an aperture of d.

[0035] Among them, the laser light source beam divergence angle is:

[0036]

[0037] Step 3: Simulate the target shape design. The mask plate installed in front of the laser equipment can achieve a high similarity between the simulated target and the real target shape.

[0038] Step 4: Equipment debugging. The hypersonic moving target simulation device consisting of a rotating mirror with a rotation speed of ω and a frequency of f, a laser light source with a beam divergence angle of θ, and a curtain with a distance of r is debugged to achieve the simulation of a moving target with a caliber of d and a flight linear velocity of V.

[0039] Example:

[0040] A high-speed motion simulation device for hypersonic moving target detection is implemented in accordance with the following steps during the specific implementation process.

[0041] Step 1: Design the parameters of the rotating mirror of the simulation device. Design the parameters of the rotating mirror according to the simulation target speed index requirements. When the simulation target speed index V is 1800m / s, the movement speed of the image projected on the screen is:

[0042] V=ωr=2πrf=1800m / s (3)

[0043] Among them, ω represents the angular velocity of the rotating mirror, r is the laser transmission distance between the laser light source and the rotating mirror, and f represents the rotating mirror frequency. If a 50Hz rotating mirror is selected, and its rotation speed is 3000 rpm, then:

[0044]

[0045] Therefore, to achieve the simulation of a moving target with a linear velocity of 1800 m / s, a rotating mirror with a minimum rotation speed of 3000 rpm is used for simulation, and the laser transmission distance between the laser light source and the rotating mirror is 6 m.

[0046] Step 2: Design of laser parameters for simulation device. The laser beam divergence angle is θ. After passing through a transmission path with a distance of r, it reaches the simulated target receiving screen and forms a simulated target with a diameter of d. According to formula (2), when the expected length of the simulated target is 0.5 cm, when the laser transmission distance r is known to be 6 m, when the laser light source beam divergence angle θ is in the range of 8.3 mrad, a simulated target with the expected length can be generated.

[0047] Step 3: Simulation target shape design: Install a rectangular mask plate in front of the laser device to achieve a rectangular simulation target.

[0048] Step 4: Equipment debugging. The hypersonic moving target simulation device consisting of a rotating mirror with a rotation speed of 3000 rpm and a frequency of 50 Hz, a laser light source with a beam divergence angle of 8.3 mrad, and a curtain with a distance of 6 m was debugged to achieve the simulation of a moving target with a caliber of 0.5 cm and a flight line speed of 1800 m / s. Figure 4The figure shows the schematic diagram of the hypersonic moving target simulation device and the schematic diagram of the hypersonic moving target simulation results. A high-speed camera is used to capture the simulated target, and the simulated target velocity is calculated based on the displacement of the simulated target in the captured image and the acquisition time between two frames of images. The calculated result is 1802m / s, which meets the simulation requirements.

Claims

1. A method for designing a hypersonic moving target simulation device for a scaled test scenario, characterized in that: The steps include: Step 1: Design of the rotating mirror parameters of the simulation device; According to the requirements of the simulated target speed index, the mirror parameters are designed; when the simulated target speed index is V, the movement speed of the image projected onto the screen is: V=ωr=2πrf (1) Wherein, ω represents the angular velocity of the rotating mirror, r is the laser transmission distance between the laser light source and the rotating mirror, and f represents the rotating mirror frequency; Step 2: Simulation device laser parameter design; The laser beam divergence angle is θ. After passing through a transmission path with a distance of r, it reaches the simulated target receiving screen, forming a simulated target with a diameter of d. Among them, the laser light source beam divergence angle is: Step 3: Simulate target shape design; Install a mask plate in front of the laser device to achieve a high similarity between the simulated target and the real target shape; Step 4: Equipment debugging; The hypersonic moving target simulation device, which consists of a rotating mirror with a rotation speed of ω and a frequency of f, a laser light source with a beam divergence angle of θ, and a curtain at a distance of r, is debugged to realize the simulation of a moving target with a caliber of d and a flight linear velocity of V.

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