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Accelerometer Data Analysis and Presentation TechniquesThe NASA Lewis Research Center's Principal Investigator Microgravity Services project analyzes Orbital Acceleration Research Experiment and Space Acceleration Measurement System data for principal investigators of microgravity experiments. Principal investigators need a thorough understanding of data analysis techniques so that they can request appropriate analyses to best interpret accelerometer data. Accelerometer data sampling and filtering is introduced along with the related topics of resolution and aliasing. Specific information about the Orbital Acceleration Research Experiment and Space Acceleration Measurement System data sampling and filtering is given. Time domain data analysis techniques are discussed and example environment interpretations are made using plots of acceleration versus time, interval average acceleration versus time, interval root-mean-square acceleration versus time, trimmean acceleration versus time, quasi-steady three dimensional histograms, and prediction of quasi-steady levels at different locations. An introduction to Fourier transform theory and windowing is provided along with specific analysis techniques and data interpretations. The frequency domain analyses discussed are power spectral density versus frequency, cumulative root-mean-square acceleration versus frequency, root-mean-square acceleration versus frequency, one-third octave band root-mean-square acceleration versus frequency, and power spectral density versus frequency versus time (spectrogram). Instructions for accessing NASA Lewis Research Center accelerometer data and related information using the internet are provided.
Document ID
Document Type
Technical Memorandum (TM)
Rogers, Melissa J. B.
(Tal-Cut Co. North Olmstead, OH United States)
Hrovat, Kenneth
(Tal-Cut Co. North Olmstead, OH United States)
McPherson, Kevin
(NASA Lewis Research Center Cleveland, OH United States)
Moskowitz, Milton E.
(Tal-Cut Co. North Olmstead, OH United States)
Reckart, Timothy
(Tal-Cut Co. North Olmstead, OH United States)
Date Acquired
September 6, 2013
Publication Date
September 1, 1997
Subject Category
Instrumentation And Photography
Report/Patent Number
NAS 1.15:113173
Accession Number
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.
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