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ANALYSIS OF THE ERRORS OF MEMS ACCELEROMETERS BY THE ALLAN VARIATION METHOD

Електронний архів Житомирського державного технологічного університету

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Title ANALYSIS OF THE ERRORS OF MEMS ACCELEROMETERS BY THE ALLAN VARIATION METHOD
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Creator Rudyk, ?.V.
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Subject accelerometer
the error equation
Allan variance
Allan deviation
bias instability
strapdown inertial navigation system
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Description ? ?????? ???????? ??????????? ???????? ??????? ?????????????? ????, ???????? ????? ?????????????? ????? ??????? ???????????? ????????????, ?????????? ????????? ????????????? ???? ??????????????, ????? ?????????? ?????????? ?? ??????? ?????????????? (sizeeffect) ?? ???????? ????? ??????????????, ? ????? ???????? ????-????? ?????????? ??????? ? ????????? ??????? ??????????????. ?????????????? ???????? ?????????? ??????? ??????????????, ???? ?? ?????????????? ???? ?? ????????? ???????? ???????????, ? ????? ????????? ????????? ?????? ?? ?????????????-????????????? (????????????) ?????. ???????? ?????? ?????????? ????????? ?????????? ??????? ?????????????? ? ?????? ???? ?? ????? ?????????????. ????????? ??????????? ????-?????????????? ???? Gemini CAS211/291 ??? ?????? ??? ????????????? ? ???????? ????????????? 100 ??, ?? ???????????? ????? ?????????? ????? ?????????? ????? ? ????????? ???????? ?????????????? ???? ? ?????????? ??????? ????????? ?? ??????????? ??? ?????? ???, ? ????? ?????????, ?? ? ???????? ???????? ?????????????? ????????? ??????????? ???, ? ???? Z ? ????? ??????, ??? ??? ? ?? Y.
In the article we obtained the generalized equation of errors of SINS accelerometers, its components give a
characteristic of the influence of conversion coefficients errors, the inaccuracy in the installation of
accelerometer measuring axes, the size effect and the displacement of accelerometer zeroes, and a block
diagram of the formation of errors in the output signal of accelerometers is also made. The components of the
random error of accelerometers, such as bias instability and acceleration random wolk, as well as due to the
presence of white and exponentially correlated (Markov) noise, are analyzed. The models of forming the
components of the random error of accelerometers from white noise and white sequence are given. The MEMS
accelerometers of Gemini CAS211 / 291 type for each axis of the accelerometer with a sampling frequency of
100 Hz are investigated, as a result Allan variance graphs and the values of bias instability and velocity and
acceleration random walk for each axis are determined. It was found that in the output signals of the
accelerometers there is no Markov noise, and the Z axis is noisier than the X and Y axes.
 
Date 2017-06-29T12:47:44Z
2017-06-29T12:47:44Z
2017
 
Type Article
 
Identifier http://eztuir.ztu.edu.ua/123456789/6980
 
Language uk
 
Relation ?????? ????. ????? : ???????? ?????;1(79)
 
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