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Questions about Allan Variance for INS ( Gyroscope, Accelerometer )
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ammjy:
Hello, EEVBlog peoples !
Always Thanks you for your help.
in this moment, i should calculate the Allan Variance from logging data of INS to estimate error.
i recorded Gyroscope and Accelerometer, Temperature datas for 97 minute without any movement.
and now i following Matlab reference to obtain Tau-sigma graph.
( https://kr.mathworks.com/help/fusion/examples/inertial-sensor-noise-analysis-using-allan-variance.html )
Sampling time is 97.1061 minute. (from 91.98 sec till 5918.346 sec)
Total number(length) of data is 836185.
but, i can't understand what is a Fs.
Anyone know about it ?
i attached screenshot of page.
(That page support Example for that. but, unfortunately, my student version Matlab 2017b has not that example... )
Please, let me know !
awallin:
Fs is the sample-rate, and its inverse t0=1/Fs is the time-interval between data points.
ammjy:
Thanks you for your time, Awallin.
then, might be i can use recorded time data to sample rate FS !
Regard,
ammjy
awallin:
--- Quote from: ammjy on March 31, 2019, 03:59:39 pm ---then, might be i can use recorded time data to sample rate FS !
--- End quote ---
t0 = "recorded time 97mins" / "number of data points"
Fs = 1/t0
ammjy:
Good day, Awallin !
thanks to, i got result.
i appreciate for your kind help, again !
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