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A Correction Method of Surface Temperature Field of Space Object

A surface temperature and space target technology, applied in the space infrared detection and recognition, aerospace field, can solve the problem that the temperature field of the space target cannot be accurately obtained, and achieve the effects of reasonable temperature field distribution, improved calculation accuracy, and high universality

Active Publication Date: 2022-05-13
BEIHANG UNIV
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Problems solved by technology

[0006] In order to solve the problem that the traditional finite volume method cannot accurately obtain the temperature field of the space target, the present invention proposes a correction method for the surface temperature field of the space target, which corrects the differential equation of heat balance in a mathematical sense

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  • A Correction Method of Surface Temperature Field of Space Object
  • A Correction Method of Surface Temperature Field of Space Object
  • A Correction Method of Surface Temperature Field of Space Object

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Embodiment Construction

[0048] The present invention will be further described in detail with reference to the accompanying drawings and embodiments.

[0049] In the prior art, corrections to the temperature field are mainly divided into corrections in a mathematical sense and in a physical sense. The correction in the physical sense is more difficult and cannot be fully simulated, such as considering the radiation of the atmosphere that changes with time, etc., the amount of calculation is greater, and the real-time performance will be reduced, and it is not universal for the correction objects in different environments. fitness. Therefore, the present invention corrects the heat balance differential equation in a mathematical sense, and proposes a correction method for the surface temperature field of a space object, which combines the linear correction method with the genetic optimization algorithm, and utilizes the measured temperature data to calculate the temperature field calculated by the fin...

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Abstract

The invention discloses a method for correcting the surface temperature field of a space object, which belongs to the field of aerospace technology. In this method, the target in the space radiation environment is firstly selected as a calculation example, and the calculation example is meshed; then, the finite volume method is used to establish the heat balance differential equation corresponding to each grid unit and perform deformation operations on the divided grid units. For the four function items in the heat balance differential equation of deformation, multiply the correction coefficients respectively to obtain the correction equation. Finally, the genetic optimization algorithm is used to optimize the correction equation to obtain the optimal correction coefficient; the optimal correction coefficient value is substituted into the correction equation as the heat balance differential equation of the new grid unit. The finite volume method is used to calculate the heat balance differential equation of the new grid unit, and the corrected temperature field of each grid unit of the spatial target is obtained, and then the overall temperature field of the target is obtained. The invention has high universality, improves the correction precision, and does not reduce the correction speed at the same time.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and relates to a method for correcting the surface temperature field of a space object, which is mainly applied to the accurate calculation of the temperature field in the field of space infrared detection and identification. Background technique [0002] The methods for obtaining the target infrared radiation intensity in the prior art include direct measurement and simulation calculation. If the distance between the target and the detector is too far during direct measurement, the accuracy is difficult to guarantee and the measurement is difficult. However, the simulation calculation is relatively easy, and the results that meet the accuracy requirements can be obtained and the economy is better. For simulation calculations, the infrared radiation intensity is mostly calculated from the temperature field, and the accuracy of the temperature field plays a vital role in the accuracy of the inf...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F30/27G06N3/12G06F17/13G01J5/00G06F119/08
CPCG06F30/23G06F17/13G06F30/27G06N3/126G01J5/00G06F2119/08G01J5/80
Inventor 张建伟姜超
Owner BEIHANG UNIV
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