Dynamic Behaviour Observation of Quadcopter in Longitudinal Mode

Quadcopter is a multirotor-drone that consists of four motors. The thrust produced by motors is adjustable to give command to the quadcopter such as hovering, forward and backward motions, roll, yaw and pitch. Varying the thrust of motor affects the attitude of the quadcopter. The focus of the works reported in this paper is observing the dynamic behaviour of quadcopter through thrust differential, that is by providing non equal thrust between forward and aft motors. Longitudinal mode behaviour was derived using Newton's second law. The translational and rotational equations found were simulated in the Simulink. As expected, the higher the thrust differential, the higher the rate of the rotation, hence the more the copter will tilt, producing higher rate of forward movement.