Gyro Stabilization In Drones
To understand the role of gyro stabilization, it’s important to realize that every drone is constantly being subjected to a number of forces coming from different directions. These forces, such as wind, affect drone’s yaw, pitch, and roll, thus, potentially, making the drone very hard to control.
Integrated gyroscopes can almost instantly detect changes in the position of a drone and compensate for it in such a way that it basically seems unaffected as it re-adjusts it’s position hundreds of time every second or can hover calmly in place. Modern gyroscopes are manufactured with components between 1 to 100 micrometers in size and often include sensors for multiple axes in a single package.
Three-Axis Vs Six-Axis Gyro Stabilization
Three-axis gyroscopes measure rotation rate around, you’ve guessed it, 3 axes: roll, pitch and yaw.
Roll: rotation around the front-to-back axis
Pitch: rotation around the side-to-side axis
Yaw: rotation around the vertical axis
Gyros keep giving non-zero readings as long as the rotation continues. However, when the rotation stops, the gyro goes silent, because, as far as it is concerned, everything is as it should be.
So, what are the 3 additional axes measured by a six-axis gyroscope? None. There are only 3 possible axes that a gyro can measure. Instead, the term “six-axis gyro” actually refers to an integrated system that consists of a 3D gyroscope (3 axis) and 3D accelerometer. Very rarely, the accelerometer can be replaced with a 3D compass.