Abstract
Quadrotors are very interesting. Among the UAVs,these vehicles can play an important role in many civilian and military applications. Quadrotors are also commonly known as drones. Indeed, the quadrotor is a small vehicle with four propellers placed around a main body. The main body includes power source,sensors and control hardware. The four rotors are used to controlling the vehicle. The rotational speeds of the four rotors are independent. It is possible to control the pitch, roll and yaw attitude of the vehicle. Then, its displacement is produced by the total thrust of the four rotors whose direction varies according to the attitude of the quadrotor. The vehicle motion can thus be controlled Due to theirself-reliance, inertial navigation systems (INS) are extremely well-suited to the field of unmanned systems, widely used on quadrotor.This paper aims to identify the motion of an unmanned aerial vehicle using a low cost inertial navigation system. An electronic circuit that consists of inertial measurement unit (IMU) with data logger and battery was designed. An implementation of the design was achieved and built on an off the shelf low cost quadrotor. The navigation system was tested and several experiments were conducted in an open field environment. Inflight measurements were collected and description of the flight data was Made. These collected data were then post processing using MATLAB and Simulink to estimate the trajectory of the quadrotor.