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Noise model of a MEMS sensor

Question asked by guerrez on Nov 29, 2012
Latest reply on Nov 29, 2012 by guerrez

Hi,

 

I am trying to use Matlab to have a model of the IMU sensor that I use.

I found a standard block of Matlab: http://www.mathworks.it/it/help/aeroblks/threeaxisinertialmeasurementunit.html

I want to set the noise of the accelerometer. The block has two noise parameter:

 

Noise seeds

The scalar seeds for the Gaussian noise generator for each axis of the accelerometer and gyroscope.

Noise power

The height of the PSD of the white noise for each axis of the accelerometer and gyroscope.

In the IMU that I use (ADIS16375) there is the "Noise Density" parameter, that is in [mg/rad(Hz)] and the "Output Noise", in [mg rms].

Someone could please explain me which value I have to put in the two Matlab parameters, and the unity of measure?

Thank you in advice,

Alessandro

UPDATE: I have found something:

"Noise Seed" is the number from which start the sequence of noise (if you put the same number, it generate the same random sequence)

"Noise Power" I haven't understood completely, but I think it accept the mg/rad(Hz)

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