Quadrotor Air Vehicle
A quadrocoptor, also called a quad rotor helicopter, is an aircraft that is lifted and propelled by four propellers. The quad rotor helicopters are classified as rotorcraft, as opposed to fixed-wing aircraft, because their lift is derived from four rotors.
They can also be classified as helicopters, though unlike standard helicopters, quad rotors are able to use fixed-pitch blades, whose angle of attack does not vary as the blades rotate.
Control of vehicle motion can be achieved by varying the relative speed of each rotor to change the thrust and torque produced by each propeller.
The distance between the location of object and mobile search robot will be calculated as a vector by means of the speed and flight period of the quadrocopter and also by GPS device.