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Direct assessment method for the reliability of a seat buffer mechanism in manned spacecraft.

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Title: Direct assessment method for the reliability of a seat buffer mechanism in manned spacecraft.
Authors: Li, Ziang1 (AUTHOR) sy1905310@buaa.edu.cn, Fu, Huimin1 (AUTHOR), Wu, Qiong2 (AUTHOR)
Source: Journal of Mechanical Science & Technology. Jun2025, Vol. 39 Issue 6, p3323-3332. 10p.
Subjects: Confidence intervals, Data conversion, Sample size (Statistics), Space vehicles, Astronauts
Abstract: The seat buffer mechanism (SBM) is a critical safety device for protecting astronauts during landing, requiring high reliability. Assessing SBM reliability is difficult due to limited sample sizes and complex data types. This paper proposes a direct reliability assessment method that evaluates the reliability confidence limit of SBM based on that of its subsystems. This method does not involve any approximate data conversion and thus improves assessment accuracy. Given that the SBM consists of metrological subsystems in series, a multiplication model for subsystem reliability confidence limits is established. The exact confidence limits of subsystem reliability are derived from metrological data. Based on the fiducial inference, a detailed derivation of the direct assessment method for SBM reliability is presented. Numerical studies show that this method surpasses traditional methods in coverage probability accuracy. An example illustrates that the proposed reliability model and assessment method for the SBM are reasonable and efficient. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Mechanical Science & Technology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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PubType: Academic Journal
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  Data: Direct assessment method for the reliability of a seat buffer mechanism in manned spacecraft.
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  Data: <searchLink fieldCode="AR" term="%22Li%2C+Ziang%22">Li, Ziang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sy1905310@buaa.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Fu%2C+Huimin%22">Fu, Huimin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Qiong%22">Wu, Qiong</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Mechanical+Science+%26+Technology%22">Journal of Mechanical Science & Technology</searchLink>. Jun2025, Vol. 39 Issue 6, p3323-3332. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Confidence+intervals%22">Confidence intervals</searchLink><br /><searchLink fieldCode="DE" term="%22Data+conversion%22">Data conversion</searchLink><br /><searchLink fieldCode="DE" term="%22Sample+size+%28Statistics%29%22">Sample size (Statistics)</searchLink><br /><searchLink fieldCode="DE" term="%22Space+vehicles%22">Space vehicles</searchLink><br /><searchLink fieldCode="DE" term="%22Astronauts%22">Astronauts</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The seat buffer mechanism (SBM) is a critical safety device for protecting astronauts during landing, requiring high reliability. Assessing SBM reliability is difficult due to limited sample sizes and complex data types. This paper proposes a direct reliability assessment method that evaluates the reliability confidence limit of SBM based on that of its subsystems. This method does not involve any approximate data conversion and thus improves assessment accuracy. Given that the SBM consists of metrological subsystems in series, a multiplication model for subsystem reliability confidence limits is established. The exact confidence limits of subsystem reliability are derived from metrological data. Based on the fiducial inference, a detailed derivation of the direct assessment method for SBM reliability is presented. Numerical studies show that this method surpasses traditional methods in coverage probability accuracy. An example illustrates that the proposed reliability model and assessment method for the SBM are reasonable and efficient. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Mechanical Science & Technology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s12206-025-0526-5
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      – Code: eng
        Text: English
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      – SubjectFull: Confidence intervals
        Type: general
      – SubjectFull: Data conversion
        Type: general
      – SubjectFull: Sample size (Statistics)
        Type: general
      – SubjectFull: Space vehicles
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      – SubjectFull: Astronauts
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      – TitleFull: Direct assessment method for the reliability of a seat buffer mechanism in manned spacecraft.
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              M: 06
              Text: Jun2025
              Type: published
              Y: 2025
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