An inertial measurement unit, or IMU, will be the most important sensor onboard the Hummingbird FCU, the quadcopter flight controller that I'm currently developing. In this video, I explain what an IMU is, dive deep into gyroscopes and accelerometer sensors, and explain how an IMU will be used in the Hummingbird FCU. I hope you find the video useful and learn something new! Check out my blog: GitHub: Video Chapters: 0:00 Intro 1:06 Inertial Frame 2:05 IMU Sensors 2:40 Gyros 5:40 Accelerometers 9:00 IMU Classification 10:32 Sensor Fusion 11:34 Conclusion