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Multi-point thin coating aircraft RCS prediction method with uncertain source

A technology of uncertain sources and prediction methods, applied in the fields of instruments, image data processing, electrical digital data processing, etc., can solve the problems of complex operation, affecting calculation efficiency and accuracy, and complex three-dimensional target shape description, and achieve high computational efficiency. Effect

Active Publication Date: 2019-09-27
NANJING UNIV OF SCI & TECH
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Problems solved by technology

However, these methods are only effective for low-dimensional problems. Compared with two-dimensional objects, the description of the shape of three-dimensional objects is more complicated, especially the objects that are close to the actual situation mostly have irregular shapes, and the information of their geometric shapes cannot be simplified. However, if it is described according to the subdivision grid of the target, too much information is required, which will seriously affect the calculation efficiency and accuracy, and the operation is very complicated. Therefore, it is difficult to describe the 3D actual target conveniently and effectively by using the current research method Changes in shape and uncertainty analysis

Method used

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  • Multi-point thin coating aircraft RCS prediction method with uncertain source
  • Multi-point thin coating aircraft RCS prediction method with uncertain source
  • Multi-point thin coating aircraft RCS prediction method with uncertain source

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Embodiment

[0066] In this embodiment, a typical simulation of the electromagnetic scattering characteristics of a multi-coated aircraft model with an uncertain missile length is carried out. The simulation is performed on a computing platform with an Inter(R)Core(TM)i7-4790K CPU@4.0GHz and a memory of 16GB. Realized above, the coated missile aircraft model such as image 3 As shown, by using the non-rational B-spline surface modeling method, the missile model can be constructed using 53 NURBS patches, and the model shape is controlled by 98 control points, such as Figure 4 shown. The nose of the aircraft is placed along the +z direction, and the median dimensions in the three directions of x, y, and z are 1.37λ×2.6λ×6.3λ respectively, and the change of the projectile length is [-0.5λ,0.5λ] , where λ is the wavelength. In the missile model, the length of the missile body is only determined by Figure 5 The z-direction coordinates of the nine control points are shown. Therefore, it is o...

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Abstract

The invention discloses a multi-point thin coating aircraft RCS prediction method with uncertain source. The method comprises the following steps of establishing an MTDS electric field integral equation; establishing a geometric model of a multi-point thin coating aircraft with shape uncertainty; extracting the shape uncertain parameters of the multi-point thin coating aircraft; analyzing the electromagnetic scattering characteristics of the multi-point thin coating aircraft with the shape uncertainty. According to the method, the uncertainty of the geometric shape of the shape uncertainty is introduced into a matrix equation of an MTDS integral equation method through a primary function with random variables; furthermore, the RCS of the multi-position thin coating aircraft with the uncertain appearance can be effectively and quantitatively predicted through a disturbance method, and the method can better simulate a metal object with multi-position multi-medium sheet thin coating.

Description

technical field [0001] The invention belongs to the technical field of numerical calculation of target electromagnetic scattering characteristics, and in particular relates to an RCS prediction method for multi-place thin-coated aircraft with uncertain sources. Background technique [0002] In today's era of rapid military technological change, the asymmetric strategic thinking of "using one's own strengths to attack one's weaknesses" is bound to become the mainstream. Zero-contact asymmetric warfare will become an important feature of future warfare. However, only the absolute superiority of technical equipment can achieve zero contact, so the research on stealth technology is particularly important in the field of stealth combat. Coating microwave-absorbing materials on the strong reflection points of stealth targets or on the entire stealth target has become an important stealth technology that can be realized. This technology has been widely used in the military field b...

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Application Information

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IPC IPC(8): G06F17/50G06T17/00
CPCG06T17/00G06F30/20Y02T90/00
Inventor 何姿陈如山丁大志樊振宏万军
Owner NANJING UNIV OF SCI & TECH
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