I want to model a MEMS gyro in simulink. I have true rotational rate as an input, then add a constant bias (random value), then I add integrated white noise for random walk. Is this correct? Do I need to add effects from g-dependent drift? How do I do this? Am I modeling random walk correctly? Is this correct to use integrated noise, or do I just use white noise without integrating? Also, how do I set the value for this random walk noise generator? Do I use as Angle Random Walk (deg/sqrt(hr)) or Bias stability (deg/hr) or Rate noise spectral Density? How do I use these specifications in my model?
Dear John
I have seen two Matlab gyro models this before http://www.mathworks.com/help/physmod/elec/ref/gyro.html?refresh=true
but I think this model may suit you better as it is a three axis gyro model http://www.mathworks.com/help/aeroblks/threeaxisgyroscope.html
hope these assist you.
regards Gerro
Thanks Gerro, I'm sure those models are great, but I don't have either of those toolboxes required to make use of them, hence why I'm trying to develop my own. But at least in the GNC model they give the equation that is used. This equation shows a noise term, but doesn't give enough information to know what it is. They show Noise power and Limits of Inf. That kind of implies that it might be integrated noise otherwise I would think it would be limited in value.
john
These materials are going to be helpful to check your noise results and model your design correctly.
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