Research On UAV Autonomous Flight Control Technology Based On Onboard SDK

Unmanned aerial vehicle(UAV)has great usability because of the advantages of easy control,low production cost,no driving and so on,it is widely used in civil and military fields.Therefore,the research on UAV has become a hot spot in the world.Since the beginning,the UAV on the market fly out and can not accurately landed on the starting point,but can be landed in the starting point for the center,the radius of one meter in the circle.Firstly,this parper introduces the current situation of the UAV's precision landing in China and abroad,and points out that the problem is that the UAV can't land on the starting point after the mission.In order to solve this problem,this paper puts forward the overall design scheme of autonomous control precision positioning system.The system consists of three parts:the main processor STM32,Bluetooth receiver module,infrared transmitter composed of airborne equipment;A circular area with a uniform distribution of several infrared receivers is called a ground receiving station;The monitoring module is composed of main processor STM32,TFT-LCD screen and Bluetooth transmitting module.The working principle is:when the UAV landing above the receiving station,the airborne equipment began to launch the infrared signal of specific angle.Receiver station will receive the infrared signal and monitoring module will determine the specific range of landing UAV through the real-time detection of the receive state of infrared receiver.Only all the infrared receivers receive the infrared signal to illustrate the UAV landing dirction accurately,if one or more infrared receiver can't receive the infrared signal,the UAV landing will deviate from this direction.The monitoring module sends the UAV's orientation signal to the airborne equipment through the Bluetooth module,the airborne equipment will adjust the position of the UAV,achieve the purpose of precise landing.On the basis of the overall design scheme,make a complete of experiment platform for autonomous control UAV to land precisely.In the process of simulating UAV landing,it can accurately reflect and adjust the direction of UAV to precise landing to the start point.