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Uncertainty determination method of spacecraft total leak rate test result

A technology for testing results and determining methods, which can solve problems such as inability to evaluate the reliability of final test results and incomplete test results, etc.

Active Publication Date: 2013-02-13
BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is incomplete in terms of test results, and it is impossible to evaluate the reliability of the final test results

Method used

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  • Uncertainty determination method of spacecraft total leak rate test result
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  • Uncertainty determination method of spacecraft total leak rate test result

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Embodiment Construction

[0017] The following is a specific implementation manner of the content of the present invention, and the content of the present invention will be further clarified through the specific implementation mode below. Of course, the following specific embodiments are described only to illustrate different aspects of the present invention, and should not be construed as limiting the scope of the present invention.

[0018] Such as figure 1 As shown, the test process of the present invention is: the helium in the helium cylinder 7 is filled in the spacecraft 4 through the control console 6, the spacecraft 4 is placed in the collection chamber 5, and the blower fan 3 is stirred, so that the collection chamber 5 The air in is mixed evenly, now test the helium concentration in the collecting chamber 5 with leak detector 1, obtain I 1 value; Spacecraft 4 is placed in collection chamber 5 after Δt period of time, the output of measuring leak detector 1 again is I 2 Value; Put the standa...

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Abstract

The invention discloses an uncertainty determination method of a spacecraft total leak rate test result. The method comprises the following steps of: determining an uncertainty source; determining uncertainty component introduced by a system effect; determining uncertainty component introduced by measurement repeatability; determining synthesis standard uncertainty; and determining expansion uncertainty. By the system, the uncertainty caused by the system effect and the uncertainty caused by the measurement repeatability are firstly evaluated, and the synthesis standard uncertainty and the expansion uncertainty are obtained according to the test result by utilizing an uncertainty basic theory. Direct basis is provided for reliability evaluation of the spacecraft total leak rate test result.

Description

technical field [0001] The invention belongs to the technical field of leak detection, and in particular relates to a method for determining the uncertainty of a spacecraft total leak rate test result, which can be used to evaluate the uncertainty of the spacecraft total leak rate test result. Background technique [0002] At present, the total leak rate test of my country's spacecraft adopts the non-vacuum cumulative leak detection method of helium mass spectrometry, and the leak detection test results only have test values ​​without expanded uncertainty. This is incomplete in terms of test results, and it is impossible to evaluate the reliability of the final test results. Therefore, it is necessary to determine the uncertainty of the spacecraft total leak rate test results to improve the reliability of the test results. Contents of the invention [0003] The purpose of the present invention is to provide a method for determining the uncertainty of the test result of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/20
Inventor 王勇闫荣鑫孙立臣王静涛
Owner BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
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