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CN104374798A - System and method for testing equivalent emissivity of electrically controlled heat shield - Google Patents

System and method for testing equivalent emissivity of electrically controlled heat shield Download PDF

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Publication number
CN104374798A
CN104374798A CN201410606605.5A CN201410606605A CN104374798A CN 104374798 A CN104374798 A CN 104374798A CN 201410606605 A CN201410606605 A CN 201410606605A CN 104374798 A CN104374798 A CN 104374798A
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CN
China
Prior art keywords
thermoscreen
automatically controlled
heat shield
equivalent emissivity
electrically controlled
Prior art date
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Pending
Application number
CN201410606605.5A
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Chinese (zh)
Inventor
胡明亮
陈菡
翟载腾
陆江峰
刘荣辉
腊栋
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Shanghai Institute of Satellite Engineering
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Shanghai Institute of Satellite Engineering
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Publication date
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Priority to CN201410606605.5A priority Critical patent/CN104374798A/en
Publication of CN104374798A publication Critical patent/CN104374798A/en
Pending legal-status Critical Current

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Abstract

The invention provides a system and a method for testing equivalent emissivity of an electrically controlled heat shield. The system comprises an electrically controlled heat shield mounting bottom plate, a thermocouple temperature measuring system, an electric heating system, a multi-layer thermal insulation assembly and a low-temperature vacuum container. The method comprises the following steps: respectively measuring the heating power and temperature of the electrically controlled heat shield mounting bottom plate when the multiple layers of the electrically controlled heat shield are opened to different positions, and calculating the equivalent emissivity of a thermal control coating of the electrically controlled heat shield mounting bottom plate according to an equivalent emissivity calculation formula, so as to obtain a relationship of T-epsilon eff. According to the system and the method disclosed by the invention, the problem of measurement of the equivalent emissivity of the electrically controlled heat shield is solved, accurate input parameters are provided for an electrically controlled heat shield mathematical model established for performing thermal analysis and calculation on the electrically controlled heat shield and a spacecraft thermal control subsystem according to test data acquired by the method, the design accuracy of the electrically controlled heat shield and the thermal control subsystem is guaranteed, and a technical support is provided for application of the electrically controlled heat shield on the spacecraft.

Description

Automatically controlled thermoscreen equivalent emissivity test macro and method
Technical field
The present invention relates to method of testing, particularly, relate to the automatically controlled thermoscreen equivalent emissivity ε that satellite uses efftest macro and method.
Background technology
Along with the development of satellite technology, especially for the satellite in current various subsequent models satellite and planning, its satellite borne equipment is many, measuring accuracy is high, thermal value is large, temperature control requirement is high, traditional heat control means based on Passive Control can not adapt to completely, the active adjustment ability of system must be improved by Novel hot control techniques further, improve temperature conditions.Automatically controlled thermoscreen is exactly a kind of novel thermal control technology, drives the folding of multilayer by mechanism section, thus controls satellite cooling surface area and heat-sinking capability, improves the change of inside satellite heat power consumption and Orbital heat flux changes the temperature fluctuation caused.
The equivalent emissivity ε of automatically controlled thermoscreen multilayer under difference opens area (1A, 2A, 3A, 4A, 5A position) efffor evaluating the unique technical index of automatically controlled thermoscreen heat dispersion, must test on ground.Automatically controlled thermoscreen is directly installed on satellite side plate radiating surface, and with satellite thermal coupling, the open area different by automatically controlled thermoscreen multilayer realizes as the change of satellite radiating surface.When CALCULATION OF THERMAL is carried out in the design of satellite thermal control subsystem, automatically controlled thermoscreen mathematical model need be set up, to analyze the impact of automatically controlled thermoscreen folding change on satellite temperature, estimate the result of use in-orbit of automatically controlled thermoscreen, determine rational design proposal for satellite thermal control subsystem and carry out automatically controlled thermoscreen detailed design (installing plate radiating surface size) to provide foundation.When whole star CALCULATION OF THERMAL, for simplifying amount of calculation, improving computing velocity, generally short-cut method being adopted to automatically controlled thermoscreen mathematical model: set up automatically controlled thermoscreen installing plate radiating surface thermal control coating model of the same area, by equivalent emissivity ε effcarry out the equivalence of automatically controlled thermoscreen area heat dissipation capacity.Therefore, if this parameter is inaccurate, automatically controlled thermoscreen folding change cannot be carried out exactly to the impact analysis for satellite temperature, thus the result of use in-orbit of automatically controlled thermoscreen cannot be estimated exactly.
Automatically controlled thermoscreen equivalent emissivity ε effcomparatively large with theoretical value deviation, reason is:
1, when automatically controlled thermoscreen multilayer is opened, due to blocking of the parts such as screw mandrel, nut, guide rod, support on automatically controlled thermoscreen multilayer and plate, cause automatically controlled thermoscreen true heat gain value lower than the heat dissipation capacity of same homalographic installing plate white paint, and open area to multilayer and installing plate temperature is directly proportional.
2, when automatically controlled thermoscreen multilayer is closed, reduce owing to existing between automatically controlled thermoscreen multilayer, cause automatically controlled thermoscreen multilayer to leak the hot leakage heat being greater than same homalographic satellite multilayer, and be directly proportional to installing plate temperature.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of method of testing of automatically controlled thermoscreen equivalent emissivity.Technical matters to be solved by this invention proposes a kind of method for carrying out the equivalent emissivity test when installing plate different temperatures, difference open area of automatically controlled thermoscreen, thus obtain automatically controlled thermoscreen equivalent emissivity parameter comparatively accurately.
According to one provided by the invention automatically controlled thermoscreen equivalent emissivity test macro, comprise automatically controlled thermoscreen mounting base, Thermocouple Temperature Measure System, electric heating system, multilayer insulation assembly, vacuum and low temperature container;
Thermocouple Temperature Measure System comprises connected temperature measurer and thermopair;
Electric heating system comprises connected programmable power supply and electric heater;
The front face surface of automatically controlled thermoscreen mounting base is the white paint of spraying, and the reverse side of automatically controlled thermoscreen mounting base is coated multilayer;
The reverse side of automatically controlled thermoscreen installing plate evenly pastes Multi-path electricity well heater;
Multiple thermopair is evenly pasted in the front of automatically controlled thermoscreen installing plate, and thermopair is in order to measure the temperature of automatically controlled thermoscreen installing plate, and position of thermocouple is corresponding with electric heater;
Reverse side and the side of automatically controlled thermoscreen installing plate are coated with multilayer insulation assembly, leak heat to reduce testpieces radiation;
Automatically controlled thermoscreen mounting base, thermopair, electric heater, multilayer insulation assembly are positioned at vacuum and low temperature container;
Temperature measurer, programmable power supply are positioned at outside vacuum and low temperature container.
Preferably, the test tool being positioned at vacuum and low temperature container is also comprised;
Automatically controlled thermoscreen installing plate is arranged on test tool, pads thermoscreen between automatically controlled thermoscreen installing plate and test tool, leaks heat to reduce testpieces heat conduction;
Preferably, automatically controlled thermoscreen and automatically controlled thermoscreen controller is also comprised;
Automatically controlled thermoscreen controller is positioned over outside vacuum and low temperature container, and by transit cable be positioned at vacuum and low temperature container and the automatically controlled thermoscreen being installed on automatically controlled thermoscreen mounting base is connected.
According to one provided by the invention automatically controlled thermoscreen equivalent emissivity method of testing, comprise the steps:
Steps A: set up the automatically controlled thermoscreen equivalent emissivity test macro according to any one of claims 1 to 3;
Step B: under vacuum low-temperature environment, measuring automatically controlled thermoscreen multilayer respectively by Thermocouple Temperature Measure System is being opened under diverse location, automatically controlled thermoscreen mounting base heating power and temperature, carry out according to equivalent emissivity computing formula the equivalent emissivity calculating automatically controlled thermoscreen mounting base thermal control coating, obtain T-ε effrelation, wherein, T represents automatically controlled thermoscreen installing plate temperature, ε efrepresent automatically controlled thermoscreen equivalent emissivity.
Preferably, described diverse location, refers to that automatically controlled thermoscreen is in standard-sized sheet respectively, opens 3/4, opens 1/2, opens 1/4, these positions of complete shut-down.
Preferably, when automatically controlled thermoscreen is in an open position, regulate each road electric heater capacity, automatically controlled thermoscreen installing plate temperature is controlled respectively at-40 ± 3 DEG C ,-30 ± 3 DEG C ,-20 ± 3 DEG C ,-10 ± 3 DEG C, 0 ± 3 DEG C, 10 ± 3 DEG C, 20 ± 3 DEG C, 30 ± 3 DEG C.
Preferably, carry out equivalent emissivity by following formula to calculate and T-ε effmatching:
Q in formula clean heat exchange amountfor the clean heat exchange amount (electric heater capacity, W) of automatically controlled thermoscreen; F is area of dissipation (m 2), σ is Boltzmann constant (5.67 × 10 -8), T is automatically controlled thermoscreen installing plate temperature (medial temperature in automatically controlled thermoscreen installing plate m region, absolute temperature, K).
Compared with prior art, the present invention has following beneficial effect:
The invention solves the measurement problem of automatically controlled thermoscreen equivalent emissivity, by the test figure that the method obtains, the automatically controlled thermoscreen mathematical model of carrying out CALCULATION OF THERMAL foundation for automatically controlled thermoscreen and spacecraft thermal control subsystem provides input parameter accurately, ensure that the correctness of automatically controlled thermoscreen and thermal control subsystem design, apply on spacecraft for automatically controlled thermoscreen and provide technical support.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is automatically controlled thermoscreen equivalent emissivity testpieces schematic diagram.
Fig. 2 is automatically controlled thermoscreen equivalent emissivity measurement system diagram.
Fig. 3 is automatically controlled thermoscreen schematic diagram.
In figure:
1 is automatically controlled thermoscreen multilayer;
2 is thermopair;
3 is automatically controlled thermoscreen installing plate;
4 is electric heater;
5 is motor;
6 is satellite side plate radiating surface.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
The present invention is the technical scheme that its technical matters of solution adopts: design a set of automatically controlled thermoscreen equivalent emissivity proving installation, comprise testpieces, test tool and the vacuum and low temperature containers such as automatically controlled thermoscreen, automatically controlled thermoscreen installing plate, Thermocouple Temperature Measure System, electric heating system, multilayer insulation assembly.Its innovative point is the research carried out for this domestic spacecraft thermal control new product researched and developed first of automatically controlled thermoscreen, and products characteristics must be coordinated to carry out design test method:
(1) because the installing plate of thermoscreen automatically controlled on spacecraft is aluminum honeycomb panel, horizontal poor heat conductivity.Under automatically controlled thermoscreen difference opens area, installing plate everywhere Temperature Distribution is extremely uneven, Temperature Distribution is relevant everywhere with installing plate for automatically controlled thermoscreen equivalent emissivity, therefore, must carry out the test of equivalent emissivity respectively to automatically controlled thermoscreen under difference opens area.
(2) different temperatures of automatically controlled thermoscreen installing plate is also the key factor affecting equivalent emissivity, must test respectively at different temperatures.
(3) installing plate electric heater and temperature thermocouple topological design must adapt to that automatically controlled thermoscreen is different opens area.
Particularly, step 1: set up test macro by Fig. 1 and Fig. 2:
(1) automatically controlled thermoscreen is by under thermal control design requirement, and installing plate sprays certain area white paint, coated multilayer, motor carry out temperature control (guarantee in test normal work).
(2) m road electric heater is evenly pasted at the automatically controlled thermoscreen installing plate back side, and electric heater position should be able to meet automatically controlled thermoscreen difference and open area test request.
(3) n thermopair is evenly pasted in automatically controlled thermoscreen installing plate front, and in order to measure the temperature of installing plate, position of thermocouple should be corresponding with electric heater, can meet automatically controlled thermoscreen difference and open area test request.
(4) the automatically controlled thermoscreen installing plate back side and the coated multilayer insulation assembly of side, leaks heat to reduce testpieces radiation.
(5) automatically controlled thermoscreen installing plate is arranged on test tool, and pads thermoscreen between frock, leaks heat to reduce testpieces heat conduction.
(6), outside automatically controlled thermoscreen controller placing tank, be connected with automatically controlled thermoscreen by transit cable.
In Fig. 3,1A, 2A, 3A, 4A, 5A, 1B, 2B, 3B, 4B, 5B place, position is provided with position transducer.
Step 2: test by following working condition requirement, test electric heater capacity under different operating mode, obtain automatically controlled thermoscreen installing plate temperature everywhere:
(1) automatically controlled thermoscreen is in different 1 ~ 5 different open position: 1A (standard-sized sheet), 2A (opening 3/4), 3A (opening 1/2), 4A (opening 1/4), 5A (complete shut-down) respectively.
(2) in different open position, regulate installing plate each road electric heater capacity, make installing plate temperature control respectively-40 DEG C ,-30 DEG C ,-20 DEG C ,-10 DEG C, 0 DEG C, 10 DEG C, 20 DEG C and 30 DEG C ± 3 DEG C between.
Step 3: carry out equivalent emissivity by following formula and calculate and T-ε effmatching.
Q in formula clean heat exchange amountfor the clean heat exchange amount (electric heater capacity, W) of automatically controlled thermoscreen; F is area of dissipation (m 2), σ is Boltzmann constant (5.67 × 10 -8), T is radiating surface temperature (medial temperature in an installing plate m region, absolute temperature, K).
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.

Claims (7)

1. an automatically controlled thermoscreen equivalent emissivity test macro, is characterized in that, comprise automatically controlled thermoscreen mounting base, Thermocouple Temperature Measure System, electric heating system, multilayer insulation assembly, vacuum and low temperature container;
Thermocouple Temperature Measure System comprises connected temperature measurer and thermopair;
Electric heating system comprises connected programmable power supply and electric heater;
The front face surface of automatically controlled thermoscreen mounting base is the white paint of spraying, and the reverse side of automatically controlled thermoscreen mounting base is coated multilayer;
The reverse side of automatically controlled thermoscreen installing plate evenly pastes Multi-path electricity well heater;
Multiple thermopair is evenly pasted in the front of automatically controlled thermoscreen installing plate, and thermopair is in order to measure the temperature of automatically controlled thermoscreen installing plate, and position of thermocouple is corresponding with electric heater;
Reverse side and the side of automatically controlled thermoscreen installing plate are coated with multilayer insulation assembly, leak heat to reduce testpieces radiation;
Automatically controlled thermoscreen mounting base, thermopair, electric heater, multilayer insulation assembly are positioned at vacuum and low temperature container;
Temperature measurer, programmable power supply are positioned at outside vacuum and low temperature container.
2. automatically controlled thermoscreen equivalent emissivity test macro according to claim 1, is characterized in that, also comprise the test tool being positioned at vacuum and low temperature container;
Automatically controlled thermoscreen installing plate is arranged on test tool, pads thermoscreen between automatically controlled thermoscreen installing plate and test tool, leaks heat to reduce testpieces heat conduction.
3. automatically controlled thermoscreen equivalent emissivity test macro according to claim 1, is characterized in that, also comprise automatically controlled thermoscreen and automatically controlled thermoscreen controller;
Automatically controlled thermoscreen controller is positioned over outside vacuum and low temperature container, and by transit cable be positioned at vacuum and low temperature container and the automatically controlled thermoscreen being installed on automatically controlled thermoscreen mounting base is connected.
4. an automatically controlled thermoscreen equivalent emissivity method of testing, is characterized in that, comprise the steps:
Steps A: set up the automatically controlled thermoscreen equivalent emissivity test macro according to any one of claims 1 to 3;
Step B: under vacuum low-temperature environment, measuring automatically controlled thermoscreen multilayer respectively by Thermocouple Temperature Measure System is being opened under diverse location, automatically controlled thermoscreen mounting base heating power and temperature, carry out according to equivalent emissivity computing formula the equivalent emissivity calculating automatically controlled thermoscreen mounting base thermal control coating, obtain T-ε effrelation, wherein, T represents automatically controlled thermoscreen installing plate temperature, ε efrepresent automatically controlled thermoscreen equivalent emissivity.
5. automatically controlled thermoscreen equivalent emissivity method of testing according to claim 4, is characterized in that, described diverse location, refers to that automatically controlled thermoscreen is in standard-sized sheet respectively, opens 3/4, opens 1/2, opens 1/4, these positions of complete shut-down.
6. according to the automatically controlled thermoscreen equivalent emissivity method of testing that claim 4 is stated, it is characterized in that, when automatically controlled thermoscreen is in an open position, regulate each road electric heater capacity, automatically controlled thermoscreen installing plate temperature is controlled respectively at-40 ± 3 DEG C ,-30 ± 3 DEG C ,-20 ± 3 DEG C ,-10 ± 3 DEG C, 0 ± 3 DEG C, 10 ± 3 DEG C, 20 ± 3 DEG C, 30 ± 3 DEG C.
7. automatically controlled thermoscreen equivalent emissivity method of testing according to claim 4, is characterized in that, carries out equivalent emissivity calculate and T-ε by following formula effmatching:
Q in formula clean heat exchange amountfor the clean heat exchange amount of automatically controlled thermoscreen; F is area of dissipation, and σ is Boltzmann constant, and T is automatically controlled thermoscreen installing plate temperature.
CN201410606605.5A 2014-10-31 2014-10-31 System and method for testing equivalent emissivity of electrically controlled heat shield Pending CN104374798A (en)

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Cited By (5)

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CN105116009A (en) * 2015-08-11 2015-12-02 上海原动力通信科技有限公司 Heating simulation device and heat pipe heat dispersion detection device
CN105501469A (en) * 2015-11-30 2016-04-20 上海卫星工程研究所 Electric control heat shield ontrack usage system and method
CN106768350A (en) * 2016-11-23 2017-05-31 西安昆仑工业(集团)有限责任公司 Tube cannon backs binary channels caliberating device and method
CN109357768A (en) * 2018-11-02 2019-02-19 中国空间技术研究院 A device for measuring optical coefficient of radiation heat dissipation surface
CN110775304A (en) * 2019-11-04 2020-02-11 深圳航天东方红海特卫星有限公司 Controllable reciprocating motion thermal control mechanism

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Publication number Priority date Publication date Assignee Title
CN105116009A (en) * 2015-08-11 2015-12-02 上海原动力通信科技有限公司 Heating simulation device and heat pipe heat dispersion detection device
CN105116009B (en) * 2015-08-11 2017-12-08 上海原动力通信科技有限公司 One kind heating analogue means and heat pipe heat radiation device for detecting performance
CN105501469A (en) * 2015-11-30 2016-04-20 上海卫星工程研究所 Electric control heat shield ontrack usage system and method
CN106768350A (en) * 2016-11-23 2017-05-31 西安昆仑工业(集团)有限责任公司 Tube cannon backs binary channels caliberating device and method
CN106768350B (en) * 2016-11-23 2019-04-23 西安昆仑工业(集团)有限责任公司 Tube cannon backs binary channels caliberating device and method
CN109357768A (en) * 2018-11-02 2019-02-19 中国空间技术研究院 A device for measuring optical coefficient of radiation heat dissipation surface
CN110775304A (en) * 2019-11-04 2020-02-11 深圳航天东方红海特卫星有限公司 Controllable reciprocating motion thermal control mechanism

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Application publication date: 20150225