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Ship short-wave electromagnetic environment emulational error control method based on MLFMA (multilevel fast multipole algorithm)

An electromagnetic environment and error control technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as difficult control of simulation errors and complex ship targets

Active Publication Date: 2012-06-27
CHINA SHIP DEV & DESIGN CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the complexity and super-large characteristics of ship targets, the corresponding simulation errors are still difficult to control, which brings challenges to the application of ship short-wave electromagnetic environment simulation

Method used

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  • Ship short-wave electromagnetic environment emulational error control method based on MLFMA (multilevel fast multipole algorithm)
  • Ship short-wave electromagnetic environment emulational error control method based on MLFMA (multilevel fast multipole algorithm)
  • Ship short-wave electromagnetic environment emulational error control method based on MLFMA (multilevel fast multipole algorithm)

Examples

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Embodiment Construction

[0026] Take a simplified ship as an example to describe in detail below. The simulation information using MLFMA is as follows: For the short-wave antenna, the electric field integral equation is discretized, and for the hull closed structure, the hybrid integral equation is used for discretization. Assuming that the antenna is located in the middle of the ship, the length is 10m, and the operating frequency band is 10MHz (short wave band). The simulated electromagnetic environment area is along the radial direction of the antenna, 1-30m away from the antenna.

[0027] figure 1 It is a schematic diagram of the flow of the control method, including the following steps.

[0028] 1) First import the CAD model of the ship and perform geometric repair. According to the color judgment of the ship in the electromagnetic compatibility simulation software, it is found that half of the conical mast on the top of the ship is missing, and the original half is used to complement it throug...

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Abstract

The invention provides a ship short-wave electromagnetic environment emulational error control method based on MLFMA (multilevel fast multipole algorithm), which comprises the following steps: firstly, the original geometrical model of the ship is manufactured by CAD (computer aided design); the original geometrical model is led into electromagnetic compatible emulational software, and is clearedup; secondly, gridding subdivision is carried out on the geometrical model after the geometrical model is cleared up; thirdly, quality checking and repairing are carried out on the gridding after thesubdivision; and fourthly, the MLFMA is adopted for implementing electromagnetic emulational calculation on the checked and repaired gridding and implementing short-wave electromagnetic environment emulational prediction. The ship short-wave electromagnetic environment emulational error control method is used as the pretreatment for the electromagnetic emulational treatment of the MLFMA, and can control the average ship short-wave electromagnetic environment emulational error within 3dB; therefore, the demands of engineering practice can be better satisfied.

Description

technical field [0001] The invention belongs to the field of ship electromagnetic compatibility research, and in particular relates to a short-wave electromagnetic environment simulation error control method for ship targets. Background technique [0002] Ship electromagnetic compatibility simulation technology has become an important means and method to realize ship electromagnetic compatibility by virtue of the advantages and characteristics of "reproducing reality with numbers and using virtual aided design". [0003] However, there are still some deficiencies in error control in the current research on ship electromagnetic compatibility (especially electromagnetic environment) simulation. This is mainly reflected in the relatively large error of EMC simulation. Although the most powerful method in the electromagnetic compatibility simulation algorithm—Multilevel fast multipole algorithm (MLFMA) has been used for simulation calculations when conducting short-wave electro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 方重华温定娥谭辉张崎宋东安
Owner CHINA SHIP DEV & DESIGN CENT