Aircraft Flight Mechanics - M3L05: Air data vs IMU; relative motion

Our aircraft air data system ain't in the origin of the body axes (else it wouldn't be able to measure *anything*), so how can we use it to get aircraft velocity? Furthermore, how can we use it get aircraft AoA and SS?

What if we damage some of the air data system, and have one of the measurements but not the other two. Can we use IMU (inertial measurement system) data to recover the other two? (Spoiler: we can).

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At about 31 minutes or so, I make a mistake in the W velocity - it should be +Qx_p, not minus. U and V are fine, but W is off by about 2m/s. The answers should be:

The a/c velocity components are U=37.50m/s, V=25.00m/s, W=24.27m/s
Giving a flightspeed of Vf=51.19m/s, and α=32.91deg, β=29.24deg

Which is actually pretty close to what I got, so I didn't catch it.

[willyturing]

Hi Harry, thanks for the kind sharing. First of all i have to admit i didn't watch it in detail fully, rather i sped up once in a while, i'm sorry for my impatience while still want to seek some opinions here.
I've noticed in the second half of the content, one of the objective is to use accelerometer data along with gyroscope with Coriolis force to recover the velocity, that is rarely heard of at least to me. Point is we know gyroscope uses Coriolis force principle to calculate the velocity and then integral it to get us angles, but in that calculation, the linear velocity is actually coming from its own electromechanic component inside the sensor which acts like two tiny plates constantly moving toward the opposite side, then combined with angular rotation, you calculate the Coriolis force then calculate back the angular velocity.
So i'm not sure whether you can use the data from accelerometer combined along with Coriolis force. I'm working on a project related to the IMU, i wanted to use IMU to calculate displacement, but at the end i don't think that's possible to get the quite accurate displacement calculation with IMU solely unless you gather the movement data from accelerometer and then calculate it later, that case you can give it a correct Δt in terms of the sample rate and the amount of samples you have, otherwise in my case i try to calculate it real time, which means whenever there's a data point, i need to update the displacement, i can hardly see it possible, anyway that's just my shallow opinion, looking forward to hear what you will say about this.
Thanks in advance.
Willy

[TjipzPK]

Our professor told us that IMUs are not good for flying objects. It had something to do with the gravity vector acting both on the control mass, and the box that the control mass was suspended in. Any thoughts on this?

Thanks.