Thursday, August 16, 2018

Inertial Measurement Unit (IMU)

We just learned about the Airspeed Indicator.

Some of the tools we've talked about are things called Inertial Measurement Units or just IMU for short.

Inertia is the change in the rockets speed or direction, so the tools that we talked about like the gyroscope, magnetometer and accelerometer are all used to tell how the rocket is moving, so they are all IMUs.

IMUs all help measure things called Roll, Pitch and Yaw.

Roll is like when an airplane is still going forward in the air, but does a spin so it is flipped upside down, but still going forward.
Pitch is like when the airplane moves its nose to go down toward the ground or up toward the sky.
Yaw is like when the airplane isn't flying along and then turns left or right.

Different types of rockets use different IMUs depending on what kind of sensors they need, but they all are used to measure roll, pitch and yaw.

(from: wikipedia - inertial measurement unit)

Kid Facts - Blast from the past: Tectonic plates.