‫Welcome back.
‫Now it's time to apply the three rotation mattresses that we had derived earlier.
‫I have a question to you.
‫If I tell you that the drone, with respect to the initial frame, is positioned with the coordinates
‫of X equals five meters, Y equals three meters and Z equals minus seven meters.
‫And the fi angle is zero point two radians, the theta angle is zero point three radians and the angle
‫is zero point for radians.
‫My question to you is, would you be able to describe the position and the attitude of the drone, both
‫video for a second and try to think about it?
‫The answer is no.
‫You could determine the position of the drone, but now I have an exercise for you with regards to the
‫attitude of the drone, and that exercise will help you understand why right now, at this point, you
‫are not able to determine the attitude of the drone.
‫Imagine that the inertial and body frames are completely aligned like this.
‫First, rotate the body frame about the inertial frame axis in this order.
‫First, rotate about the x axis by PI over to Radiance.
‫This is your first rotation.
‫Then rotate about the y axis by pi over to radians or ninety degrees.
‫That's your second rotation.
‫And then rotate about the Z axis by a pi over to radians and that's your third rotation and then do
‫the same thing.
‫But first rotate about the Z axis pi over to radians.
‫That's your first rotation then about the Y axis prior to radians that's your second rotation and then
‫pi over to radians about the x axis.
‫And now this is your third rotation.
‫Do this exercise and you will see the answers in the next video.
‫See what you will get.
‫Will the body frames end up in the same orientation or not?
‫Thank you very much.