There are always plenty of things in our minds when it comes to assure safety and manage risks. If you are new to the quadcopter and you don’t want to hit someone or lose your package or avoid crashing it, then you must know about its rotors and how it works.
The four motors, two spinning clockwise and two spinning counter-clockwise provides the drone to have a stable flight. They keep the drone still until it is ready to change its direction. But in case any one of the rotors fail, the same torque will cause the quadcopter to lose control.
A quadcopter is actually a multi rotorcraft that is lifted through the four motors. The propellers of the quadcopter are vertically arranged and work at varying speed. They give the drone required thrust, speed, and turning force to lift to the air. The rotors work in pairs, and any failure of one rotor might result in falling and crashing of the drone.
Many people think that compared to a helicopter, that has a single main rotor; a quadcopter is much safer to use. After all, a uav has so many possibilities to fly safely with its multiple rotors. Well, if you think that because it has four rotors so it is safer, as a failure of one rotor wouldn’t matter, and other rotors will compensate the loss, then you are slightly misunderstood because unfortunately, that’s not true. A quadcopter might face difficulty even if one rotor fails. It needs all four rotors to be operational for safer flights.
It was already accepted by the pilots and industry, long ago that a quadcopter will not work and fall unless all its four rotors are not working. That’s why each rotor is called a potential single point failure by aeronautical engineers. All the motors are very important because an aircraft can not fly without them. They may look as if they are really easy to fly and deliver packages, but only the computer is handling the very complicated and difficult stuff each second when it is in the air.
The Delft University of Technology of Netherland is trying to solve this issue, and in Spain, the IROS 2018 has already demonstrated a “fault tolerance controller’’ which will allow the drone to keep on flying at high speed even if a rotor is broken or motor has failed.
Imagine if you are delivering a package, and your drone is flying over the river, and one of the rotors fail, then your drone along with the package will uncontrollably fall in the water. That’s why people are trying to add this feature so that the drone can safely reach the destination even after experiencing any failure in the motor.
It’s not easy at all to achieve this mission; it’s all thanks to the smart math by Delft investigators, who succeeded in gathering the information to build such type of drone from which a safe flight will be achieved with the remaining three rotors.
The four motors, two spinning clockwise and two spinning counter-clockwise provides the drone to have a stable flight. They keep the drone still until it is ready to change its direction. But in case any of the rotors fail, the same torque will cause the quadcopter to lose control.