A simulation method of external heat flow in vacuum thermal test of high-orbit optical remote sensor

Abstract

A high-orbit optical remote sensor vacuum hot test external heat flow simulation method comprises the steps of firstly determining solar radiation heat flow according to on-orbit solar absorptance of an optical remote sensor (3), secondarily arranging the optical remote sensor (3) in a vacuum environment simulation chamber (1), then determining a 'sun outage' time period by judging whether the solar radiation heat flow Q1 (t) absorbed by an optical system within a orbit period is 0 or not, determining the time period of the Q1 (t) unequal to 0 as the 'sun outage' time period, adopting a solar simulator (2) and electric heater combined simulation scheme to perform outer heat flow simulation, determining that the time period of the Q1 (t) equal to 0 is a 'non-sun outage' time period, and adopting an independent electric heater simulation scheme to perform outer heat flow simulation. The problem that an existing non-contact space optical remote sensor outer heat flow simulation method does not have a solar spectral energy spectrum characteristic and directionality is solved, energy distribution of solar spectrum of the remote sensor on orbit can be accurately simulated, simulation accuracy is high, and project realization is promoted.

Description

technical field [0001] The invention belongs to the field of thermal control, and relates to an environmental thermal test method of an aerospace optical remote sensor. Background technique [0002] Space optical remote sensors have to endure the alternating heating and cooling of the sun, planets, and space low-temperature heat sinks for a long time during their orbital operation. The working environment is extremely harsh, and the surface of the remote sensor faces drastic temperature changes. With the increasing demand for optical resolution, extremely high requirements are placed on the operating temperature of the optical-mechanical system. Therefore, it is necessary to adopt reasonable and effective thermal control technology to achieve precise temperature control of the remote sensor. [0003] In order to verify the rationality of the thermal control scheme and the temperature control ability of thermal control products, sufficient ground environmental tests are requi...

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the invention is to solve the problem that the existing non-contact space optical remote sensor external heat flow simulation method does not have the characteristics and directionality of the solar spectrum energy spectrum, and provides a vacuum heat test suitable for high-orbit optical remote sensors. The method of external heat flow simulation can accurately simulate the energy distribution of the solar spectrum received by the remote sensor on orbit, with high simulation accuracy and easy engineering implementation

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