Accession Number : AD0748251

Title :   Simulated Orbital Life Tests for Spacecraft Cells. Part II. Automatically Acquired Data, Review, and Recommendations.

Descriptive Note : Special technical rept.,

Corporate Author : BATTELLE COLUMBUS LABS OHIO

Personal Author(s) : Roeger,Earl A. ; Thomas,Ralph E. ; McCallum,John ; Waite,John H. ; Miller,Gerald H.

Report Date : AUG 1972

Pagination or Media Count : 33

Abstract : Content, availability, and recommended procedures for analysis of the data automatically acquired during 4-1/2 years of simulated orbital life testing of nickel cadmium spacecraft cells are described. A sample of the approximately 1,000,000 records that are stored on magnetic tape is included and summary tables list documented conditions that may have yielded discontinuities, irregularities, or biases in the record data. Recommendations for data analysis by empirical, statistical, and physical methods are provided. The empirical method attempts to identify all possible indicators associated with failed cells. The physical methods examine the data, or its form for regular and irregular trends, and explain these trends by cause and effect relationships and underlying physical concepts.

Descriptors :   (*STORAGE BATTERIES, RELIABILITY(ELECTRONICS)), (*SPACECRAFT COMPONENTS, STORAGE BATTERIES), TEST METHODS, DATA PROCESSING, CORRELATION TECHNIQUES, ALKALINE BATTERIES, NICKEL, CADMIUM, SPACE ENVIRONMENTS

Subject Categories : Electrochemical Energy Storage
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE