hi, experts.

thank u for your helps.

i wanna develop car navigation system using adis16305.

so i bought many products(adis16305). but adis16305 has no x, y gyroscope.

first i think car navigation system using pitch, roll from adis16305. but during motion(x,y axis accelemeter >0), pitch and roll is incorrect.

i'm going to add x,y gyroscope sensor(adxr290) in my navigation device.

is it possible?

if possible, i wanna the navigation error after 1 minute, 5 minutes.

thank u.

Thank you for your post. I am not sure that the ADIS16305 is the best starting point for this type of system. The gyroscopes support ~25 deg/hour of in-run bias stability in the gyroscopes. If you use a strapdown navigation system approach, an integrator feeds back orientation information to the accelerometer calibration, prior to velocity and position estimation stages. So, if we look at 1 minute, the gyroscope's in-run bias stability will contribute 240 meters of position error.

A_er = sin(25 deg/hour x 1 minute x 1 hour/60 minutes) = 7.3mg

V_er = 7.3mg x 9.8mm/s^2/1mg x 60 seconds = 4.3 m/sec (velocity error after 1 minute)

D_er = 7.3mg x 9.8mm/s^2/1mg x (60 seconds)^2 = ~240 meters

You mention the ADXRS290, but you might want to consider the newly released ADIS16460, which has 4x better bias stability and much better accelerometers Even then, you might find that you will need access to other observers (other sensors) to help manage these error sources in a Kalman Filter or other sensor fusion routine.

Does this help?