by pizza » Wed Apr 21, 2010 5:11 am
mitch i think you refer to this schematic. there is only a lpf at the xout and yout...do they cause problems?
ramshee can you post the equations that you used to convert your gyroscope values?
this is what i did
gyroX = ((raw_gyroX-gyroXzero)*3.3/4095)/2*1000;
gyroY = ((raw_gyroY-gyroYzero)*3.3/4095)/2*1000;
using a 12bit adc and 3.3V for adc vref...sampling at 800hz so my dt is 1/800.. then i ran a 4th order runge kutta filter before pumping the values into tom's linear kalman filter. using IDG300..
yeah im totally interested in the functions of AZ PTATS and VREF pins of IDG500..like how can they correct the bias?
from the datasheet, we need to pulse(rising edge, more than 2us less than 1500us) the AZ pin for the function to activate, from my understanding, it forces zero rate/bias back to 1.35V, however i do not know how frequently you need to do that, as i have not received my idg500. anybody tried?
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