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Simulation Method of Body Target Echo Based on Matlab

A technology of target echo and simulation method, which is applied in design optimization/simulation, attack equipment, fuze and other directions, and can solve the problems of large error and unrealistic simulation of body target echo.

Active Publication Date: 2020-07-31
NANJING UNIV OF SCI & TECH
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Problems solved by technology

[0005] In a word, the problems existing in the prior art are: the echo simulation error of the body target is large and unrealistic.

Method used

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  • Simulation Method of Body Target Echo Based on Matlab
  • Simulation Method of Body Target Echo Based on Matlab
  • Simulation Method of Body Target Echo Based on Matlab

Examples

Experimental program
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Effect test

Embodiment

[0062] Tracking parameters:

[0063] The target is the PAC-3 missile, with a total length of 5.2m, a wingspan of 0.5m, and a tail span of 0.6m.

[0064] The speed of the tracking radar is set to 600, the initial position is (-100, 0, -100), the speed of the target PAC-3 missile is set to 420, the initial position is (0, 0, 0), the wavelength is 1cm, and the pulse repetition period is 0.01s, the pulse width is 0.003s. Figure 6 Shown is a schematic diagram of the proportional guidance method tracking process. Figure 7 is the echo simulation signal during the tracking process.

[0065] From Figure 6 , Figure 7 It can be seen that in Figure 6 During the tracking process of the proportional guidance method shown, the projectiles and targets gradually converge, but Figure 7 The relationship between the amplitude of the echo signal and the cube of the distance shown is not strictly in accordance with the inverse proportional function. The signal amplitude has a sag around...

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Abstract

The invention discloses a volume target echo simulation method based on a matlab. The volume target echo simulation method based on the matlab is characterized by comprising the following steps that (10) volume target 3D modeling is carried out, specifically, volume targets are divided into a plurality of surface elements in the matlab, whether each element is effective in the tracking process ornot is determined, and effective surface elements are obtained; (20) surface element RCS calculation is carried out, specifically, each effective surface element is equivalent to a metal plate, and anRCS of each effective surface element is obtained by a physical optics method; and (30) volume target echoes are generated, specifically, at each simulation moment, echo signals generated by all theeffective surface elements are superimposed to obtain the echo signals at the simulation moment, and then signal time domains of all the simulation moments are superimposed to obtain an echo analog signal of a volume target. According to the volume target echo simulation method based on the matlab, a simulation signal is closer to a real echo signal.

Description

technical field [0001] The invention belongs to the technical field of fuze target echo simulation, in particular to a matlab-based body target echo simulation method in which the simulated signal is closer to the real echo signal. Background technique [0002] With the continuous progress and development of the radio fuze, especially in its development and debugging stage, it is very important to fully test the fuze. The use of echo simulators for testing can greatly reduce the dependence on range experiments, and greatly save manpower, material and financial resources. [0003] But in the past, when simulating the echo of a body target, the body target is usually approximated as N points, and each point is regarded as a point target to generate echo signals, and finally vector superposition is performed. In the paper of Modeling and Realization of Fuze Target Echo Simulator in Journal of System Simulation, the specific process of this method is described in detail. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42C21/00G06F30/20
CPCF42C21/00G06F30/20
Inventor 赵惠昌王旭侯平周冲
Owner NANJING UNIV OF SCI & TECH
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