Flying robot might sound confusing, but it's really just about stability and thrust control. The basic principle in a four-rotor system (most models are like this) is that each motor's RPM is adjusted to keep the drone balanced. So, how does the electronic speed controller (ESC) that powers those rotors work? It changes the motor speed using a PWM signal. Additionally, IMU sensors (accelerometer + gyroscope) continuously analyze data to maintain autonomous balance. You can't see all of this, but you can understand how critical the algorithms are.
So what's the physics behind this drone technology?
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Just think of it like the steering system in RC cars; ESC controls the motor with pulsed signals there too, but it's much simpler compared to a drone. While the car just goes forward and backward, a drone can move 360 degrees, and what gives it that flexibility is the IMU sensors and the independent acceleration of the motors. So, keeping a drone balanced is like a delicate dance that would be impossible to pull off in an RC car—it has to react instantly to the slightest tilt.