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The heating method of key equipment under uncontrolled and under-power condition

A key equipment and under-power technology, which is applied in the heating field of key equipment under uncontrolled and under-power conditions in satellites, can solve problems such as thermal balance damage, equipment damage, and overall or local temperature that cannot meet the requirements for equipment startup and use. Achieve the effect of restoring the temperature level of the whole star and a wide range of applications

Active Publication Date: 2012-11-14
BEIJING INST OF SPACECRAFT SYST ENG
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AI Technical Summary

Problems solved by technology

The heat balance relationship between the interior and exterior of the satellite is destroyed, and the overall temperature or local temperature in the satellite cannot meet the requirements for starting up and using the equipment. Forcing the start-up will cause permanent damage to the equipment

Method used

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  • The heating method of key equipment under uncontrolled and under-power condition
  • The heating method of key equipment under uncontrolled and under-power condition
  • The heating method of key equipment under uncontrolled and under-power condition

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0031] First of all, when heating up the key equipment of an uncontrolled and under-powered satellite, it is necessary to study the power supply and its changing law.

[0032] When the satellite is uncontrolled, the spin axis will precess and gradually drift due to factors such as the atmospheric drag moment and the earth's gravity gradient; at the same time, due to the annual motion of the sun, the satellite itself is also deviating from the initial position. The solar cell array method increases toward the complementary angle of the included angle (hereinafter referred to as the sun incidence angle), and the solar cell gradually restores power supply. Through calculation and analysis, for the case of spin stability, the output power curve and the power supply time ratio under different sun incidence angles are given within one spin cycle. Taking i...

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Abstract

The invention belongs to a method for troubleshooting a satellite, in particular to a method for raising the temperature of key equipment of a satellite under the condition of no control and underpower. The purpose is to give the power supply power variation law when the satellite is in the uncontrolled state of spinning around the -Z axis, and use this law and effective power to propose a local heating method for key components. Including the following steps: Step 1, obtain the maximum solar incidence angle θmax within a spin period T; Step 2, obtain the variation relationship of the output current of the solar array according to θmax; Step 3, obtain the satellite charging time / spin period ratio; 4. Find the load current I that can make the satellite continuously supply power 0 =Ic / (1 / η-1); step five, determine the key equipment that needs to be heated; step six, heat the key equipment. The invention has the advantages of obtaining the magnitude and law of the power supply power in the uncontrolled state of the satellite through orbit calculation, and making full use of the change of the power supply law to restore the temperature level of the whole satellite as soon as possible.

Description

technical field [0001] The invention belongs to a method for troubleshooting a satellite, in particular to a method for raising the temperature of key equipment of a satellite under the condition of no control and underpower. Background technique [0002] When the satellite has some faults in orbit and enters an uncontrolled state, the satellite will spin around the -Z axis at a certain angular velocity. At the beginning, the direction of sunlight coincides with the spin axis of the satellite, and is perpendicular to the normal direction of the solar wing, and the solar wing cannot provide power to the satellite. Afterwards, due to the precession of the spin axis under the action of atmospheric resistance torque and gravity gradient torque, and the change of the direction of the sun in the inertial space, the direction of sunlight and the direction of the spin axis change, so that the solar wing is gradually irradiated by sunlight, resulting in a regular According to the pe...

Claims

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Application Information

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IPC IPC(8): B64G1/50
Inventor 王东韩冶钢王保平丛飞周耀华
Owner BEIJING INST OF SPACECRAFT SYST ENG
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