JP2634085B2 - Satellite - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an artificial satellite equipped with a heater for evaluating thermal design.

[Conventional technology]

First, an artificial satellite equipped with a heater for evaluating a conventional thermal design will be described. 2 and 3 are cross-sectional views showing a conventional artificial satellite equipped with a heater for evaluating a thermal design. In the figure, (1) is a vacuum chamber, (2) is an artificial satellite installed in the vacuum chamber,
(3) is a structure panel of the satellite, (4) is an electronic device mounted on the structure panel, (5) is a heat sink, (6) is a heat insulating material, and (7) is a heater. The mounting position of the heater (7) is on the structural panel (3) around the electronic device (4) in the case of FIG. 2, and on the heat sink (5) in the case of FIG.

Since the artificial satellite equipped with a heater for evaluating the conventional thermal design is configured as described above, the satellite (2) is a vacuum chamber (1) that simulates a space environment of high vacuum and cryogenic temperature.
And turn on or off the electronic device (4) in the satellite
Further, if the orbital heat input such as sunlight received by the radiator plate (5) of the satellite in the space environment is simulated by the heater (7) attached to the satellite, the heat environment to which the satellite is exposed in the actual space environment is simulated. It is possible to simulate and evaluate the temperature of the satellite in the space environment by tests on the ground.

[Problems to be solved by the invention]

In the artificial satellite equipped with a heater for evaluating the conventional thermal design as described above, in the case of FIG. 2, the electronic equipment (4) is usually provided on the structural panel (3) behind the heat sink (5).
It is difficult to attach a heater (7) to the entire inner surface of the structure panel on the back side of the heat sink because of the heat sink, and the heat sink cannot be simulated uniformly when simulating external heat input such as solar heat input. There was a problem of having unevenness. In the case of FIG. 3, since the heater (7) is attached to the surface of the radiator plate (5) (outside the satellite), it is possible to uniformly apply the heater to the entire radiator plate. Can be simulated uniformly on the radiator plate, but since the heater covers the surface of the radiator plate, which affects the infrared emissivity of the surface of the radiator plate, the heat radiation from the radiator plate is simulated as it is. There was a problem that I could not do it. When actually launching the satellite, it is necessary to remove this heater from the radiator plate. However, the radiator plate is contaminated with the adhesive of the heater, and the thermo-optical characteristics of the radiator plate (solar absorption, infrared radiation Rate).

The present invention has been made to solve such a problem, and has no unevenness in simulating external heat input such as solar heat input to a heat sink, and has a thermo-optical characteristic (solar absorption coefficient) of the heat sink. The objective of the present invention is to obtain an artificial satellite equipped with a heater for evaluating thermal design without affecting the infrared emissivity.

[Means for solving the problem]

The artificial satellite with a heater for evaluation of thermal design according to the present invention has a heater inserted between a heat sink and a structural panel.

[Action]

In the present invention, since the heater is inserted between the heat radiating plate and the structural panel, the heater can be uniformly mounted between the heat radiating plate and the structural panel without being restricted by the electronic equipment. In the simulation of the external heat input such as the solar heat input, the simulation can be performed without unevenness. Also, since the heater is inserted between the radiator plate and the structural panel, the heater can affect the thermo-optical characteristics (sunlight absorption and infrared emissivity) of the radiator without covering the surface of the radiator. Absent.

〔Example〕

FIG. 1 is a sectional view showing an embodiment of the present invention. In the figure, (1) is a vacuum chamber, (2) is an artificial satellite installed in the vacuum chamber, (3) is a structural panel of the satellite, (4) is an electronic device mounted on the structural panel,
(5) is a heat sink, (6) is a heat insulator, and (7) is a heater inserted between the heat sink and the structural panel.

In the artificial satellite equipped with a heater for thermal design evaluation configured as described above, the satellite (2) is installed in a vacuum chamber (1) that simulates a space environment of high vacuum and cryogenic temperature. Turn on or off the electronic devices (4) in the satellite, and simulate the orbital heat input such as sunlight received by the radiator plate (5) in the space environment with the heater (7) attached to the satellite. Can simulate the thermal environment exposed in the actual space environment, and can simulate and evaluate the temperature of the satellite in the space environment by tests on the ground.

Here, since the heater (7) is inserted and attached between the heat radiating plate (5) and the structural panel (3), the heater (7) can be connected to the heat radiating plate (5) without being restricted by the electronic device (4). It can be uniformly attached between the structural panels (3), and can simulate evenly in simulating external heat input such as solar heat input to the radiator plate (5). The heater (7)
Since the heater (7) is inserted between the heat sink (5) and the structural panel (3), the heater (7) does not cover the surface of the heat sink (5), and the thermo-optical characteristics of the heat sink (5) (sunlight absorptivity) , Infrared emissivity) can be simulated without external heat input such as solar heat input to the radiator plate (5).

〔The invention's effect〕

According to the present invention, as described above, the heater is inserted between the heat radiating plate and the structural panel, so that the heater can be uniformly attached, and the external heat input such as the solar heat input to the heat radiating plate can be uniformly applied. Has the effect of being able to simulate
Also, since the heater does not cover the surface of the heat sink, external heat input such as solar heat input to the heat sink can be performed without affecting the thermo-optical characteristics (sunlight absorption rate and infrared emissivity) of the heat sink. There is also an effect that the simulation can be performed, and the accuracy of the test that simulates the thermal environment of the artificial satellite in the space environment on the ground can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an artificial satellite provided with a heater for evaluating a thermal design according to the present invention, and FIGS. 2 and 3 are heaters for evaluating a conventional thermal design. It is sectional drawing which shows 2 examples of the artificial satellite attached with. In the figure, (2) is an artificial satellite, (3) is a structural panel,
(4) is an electronic device, (5) is a heat sink, and (7) is a heater. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57) [Claims] An artificial satellite having an electronic device mounted on one side of a structural panel and a radiator plate on the other side, and the artificial satellite having the artificial satellite installed in a vacuum chamber, wherein the radiator plate and the structural panel are provided. An artificial satellite, comprising a heater mounted between the satellite.