Chapter 9. IMU/AHRS
Now that we understand the basic aerodynamic forces acting on our drones, we can create a control system that uses these forces to make our drone do what we want. But in order to control our position we must know our position, and for this we start with an inertial measurement unit (IMU). Inertia describes the tendency of objects at rest to stay at rest and objects in motion to stay in motion. In other words, inertia embodies Newton’s first law of motion.
Inertia explains why you get thrown back into your seat when the car you are in accelerates or why you get thrown to the side when the car turns. Your body tried to stay in one place when the car moved or tried to keep moving in a straight line when the car turned. By way ...
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