Question

In a 6DoF flight controller, which specific axis of rotation is directly influenced by the differential speed between clockwise and counter-clockwise spinning motors?

Accepted Answer

In a 6DoF flight controller, the axis of rotation directly influenced by the differential speed between clockwise and counter-clockwise spinning motors is the yaw axis. Yaw refers to the rotation of an aircraft around its vertical axis, which is the imaginary line running from the top to the bottom of the craft. To maintain stability or change direction, a multirotor drone uses torque, which is the rotational force created by spinning propellers. Every spinning propeller generates a torque that pushes the frame in the opposite direction of the blade rotation. By designing the drone with motors that spin in alternating directions, the clockwise motors create a torque in one direction, while the counter-clockwise motors create an equal and opposite torque. When these torques are balanced, the drone stays still on the yaw axis. To initiate a yaw rotation, the flight controller increases the speed of motors spinning in one direction and decreases the speed of motors spinning in the opposite direction. This creates a net torque imbalance that causes the entire body of the drone to rotate around its vertical axis.

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In a 6DoF flight controller, which specific axis of rotation is directly influenced by the differential speed between clockwise and counter-clockwise spinning motors?