A method for accurately determining the extreme working conditions of heat flow outside the orbit of a remote sensor in its entire life cycle

A technology with full life cycle and extreme working conditions, applied in design optimization/simulation, calculation, computer-aided design, etc., to achieve comprehensive analysis results and improve calculation accuracy

Active Publication Date: 2021-02-09
BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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Problems solved by technology

Therefore, it is very necessary to carry out the screening of extreme conditions of heat flow outside the whole life cycle, but there are few studies on this aspect in the current public literature

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  • A method for accurately determining the extreme working conditions of heat flow outside the orbit of a remote sensor in its entire life cycle
  • A method for accurately determining the extreme working conditions of heat flow outside the orbit of a remote sensor in its entire life cycle
  • A method for accurately determining the extreme working conditions of heat flow outside the orbit of a remote sensor in its entire life cycle

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Embodiment Construction

[0028] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] The invention considers that the temperature stability of the optical lens is very critical to the imaging quality of the remote sensor, and takes the extreme working condition of the outer heat flow of the optical lens as the extreme working condition of the outer heat flow of the orbit of the remote sensor in its full life cycle, and proposes a full life cycle orbit of the remote sensor. Precise screening method for extreme external heat flow conditions. like figure 1 As shown, the specific steps of the method are:

[0030] (1) Select the components on the satellite that block the heat flow outside the light entrance of the remote sensor, and the components that have radiation heat exchange between the remote sensor and the optical lens. According to the geometric position relationship and contact relationship between the selected com...

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Abstract

The invention discloses a method for accurately determining the extreme working conditions of heat flow outside the orbit of a remote sensor in its full life cycle, and belongs to the technical field of precise thermal control of space optical remote sensors. Specifically: 1), select the components on the satellite that block the heat flow outside the light entrance of the remote sensor, and the components that have radiation heat exchange between the remote sensor and the optical lens, ignore the radiation, heat capacity and thermal conductivity on the back of the optical lens, and establish a limited remote sensor. Elemental thermal model; (2), using thermal analysis software, according to the preset orbit, calculate the temperature of all finite element nodes of the remote sensor finite element thermal model throughout the life cycle, and extract the entire life cycle of each finite element node of the remote sensor optical lens (3) Calculate the external heat flow absorbed by each finite element node of the optical lens of the remote sensor during the entire life cycle according to the temperature of the optical lens of the remote sensor, and select the extreme value of the external heat flow to determine the external heat flow of the orbit of the remote sensor during the entire life cycle extreme conditions. This method is comprehensive in calculation, high in efficiency and high in precision.

Description

technical field [0001] The invention relates to a method for accurately determining the extreme working conditions of the outer heat flow of the orbit of a remote sensor in the full life cycle, which is suitable for a large-diameter optical remote sensor, a low-temperature optical remote sensor and other space optical cameras that are very sensitive to external heat flow fluctuations, and belongs to the precision thermometer of the space optical remote sensor. control technology field. Background technique [0002] With the continuous improvement of the resolution and imaging quality requirements of aerospace optical remote sensors, remote sensors have a trend of gradually developing towards long focal lengths and large apertures. However, the imaging quality of the optical system with long focal length and large aperture is more sensitive to external heat flow changes, and thermal control design is required to provide accurate on-orbit heat flow analysis. In the external h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F119/08
CPCG06F30/23G06F2119/08
Inventor 于波刘义良郭楠徐娜娜高长春行麦玲
Owner BEIJING RES INST OF SPATIAL MECHANICAL & ELECTRICAL TECH
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