ANALYSIS AND EVALUATION OF SPACECRAFT BATTERY LIFE TEST DATA (PHASE 2).

Abstract

The report presents the findings from the mathematical/statistical analysis of data generated by life tests on 660 nickel-cadmium spacecraft battery cells. Three major objectives of the analysis were to: (1) determine the reliability of methods of predicting the useful life of the cells, (2) determine the statistical meaning of data collected during present acceptance testing and whether the acceptance data can be used in making life predictions, and (3) determine if particular failure characteristics or combinations thereof could be related to specific environmental factors. Results of the analysis indicate: (1) about 85% accuracy in predicting the useful life of a cell, (2) the addition of acceptance data to the prediction model is of little value, and (3) failure characteristics were found to be highly correlated with specific environmental factors in several instances. (Author)

Document Details

Document Type
Technical Report
Publication Date
Oct 17, 1969
Accession Number
AD0697938

Entities

People

  • J. R. Kent

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Computing-Related Activities
  • Data Analysis
  • Data Science
  • Information Science
  • Interdisciplinary Science
  • Life Tests
  • Mathematical Analysis
  • Mathematics
  • Performance (Engineering)
  • Reliability
  • Spacecraft
  • Statistical Analysis
  • Statistics
  • Test And Evaluation

Readers

  • Aerospace Test and Evaluation
  • Battery Technology and Engineering
  • Regression Analysis.

Technology Areas

  • Space