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Random finite element analysis based infrared-decoy-projectile pneumatic feature modeling method

A technology of aerodynamic characteristics and modeling methods, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as gaps

Inactive Publication Date: 2017-03-08
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology

However, the research on virtual scene simulation technology of decoy bombs by various domestic units is still in its infancy, especially in the establishment of accurate models of decoy bombs, which still has a large gap with foreign advanced levels

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  • Random finite element analysis based infrared-decoy-projectile pneumatic feature modeling method
  • Random finite element analysis based infrared-decoy-projectile pneumatic feature modeling method
  • Random finite element analysis based infrared-decoy-projectile pneumatic feature modeling method

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Embodiment Construction

[0082] In view of the urgent needs of infrared decoy projectile virtual scene simulation technology and infrared guidance technology research, the present invention studies the flow field distribution and motion law of decoy projectile, and proposes a finite difference method based on stochastic variation principle, and then establishes a decoy projectile Elastic aerodynamic model.

[0083] The basic principle on which the present invention is based is that the stochastic finite element analysis method is a numerical technique for solving numerical solutions of differential equations or integral equations. This solution is based on the complete elimination of differential equations, that is, the transformation of differential equations into algebraic equations (stable cases); or the rewriting of partial differential equations (systems) as an approximation of ordinary differential equations (systems), which can be used with standard numerical techniques (such as Euler method, R...

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Abstract

The invention discloses a random finite element analysis based infrared-decoy-projectile pneumatic feature modeling method. The pneumatic feature modeling method includes the steps of analysis and simplification of infrared-decoy-projectile working field, finite element subdivision of the decoy projectile working field, determination of unit interpolation based function, analysis of finite units, establishment of overall-random finite element equation, establishment and simulation of decoy projectile motion equation and the like. A temperature flow field distribution and random air-resistance movement feature model of a decoy projectile is provided on the basis of a finite analysis method by analyzing working mechanism and operating status of the decoy projectile; basis is provided for design of the infrared decoy projectile and research on an infrared guidance algorithm, and important guiding significance is achieved for establishment of an infrared visual simulation system.

Description

technical field [0001] The invention relates to a method for modeling the aerodynamic characteristics of infrared decoy bombs based on stochastic finite element analysis, and belongs to the field of research and development of infrared decoy bomb models and simulation systems. Background technique [0002] At present, relevant foreign institutions have started work on the development of infrared decoy bomb models and simulation systems. For example, the infrared imaging simulation laboratory established by the Naval Air Warfare Center in the United States, and the infrared image simulation system IRSP designed and developed by the CSA Experimental Center (Computer Science and Application Inc) in the United States have been applied in practice and played a huge role. Although relevant foreign institutions and scientific research units have conducted a lot of research on the infrared target virtual vision simulation system, there are relatively few studies on the characteristi...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 段锦胡奇翟朗
Owner CHANGCHUN UNIV OF SCI & TECH
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