I. Introduction
Unmanned Air Vehicles(UAVs), also known as drones, have been attracting wide attention in recent decades. Drones are widely used in many applications, such as military use, agriculture, aerial photography, Disaster Management, wildlife monitoring, geographic mapping, rescue, and entertainment [1]. The rapidly increased use of drones also brings safety issues to individuals and society. Due to the difficulty of flying drones, especially for inexperienced beginners, there are often mistakes in control because of inexperience or excessive nervousness. Sometimes not only causes damage to the drone but also endangers personal safety and property.