Research On Dynamic Characteristics Of Small UAV Based On Flight Tracks

In recent years,UAV has been widely used in all walks of life due to its small size,light weight and easy to control.According to the statistics of CAAC,in 2019,there are more than 392000 domestic registered UAVs and 1.25 million commercial flight hours of UAVs.With the rapid development of UAV,the management of UAV has attracted the public attention.In 2017,more than 10 airports including Chengdu,Kunming,Hangzhou and so on were disturbed by drones,resulting in the cancellation of hundreds of flights and the detention of tens of thousands of passengers.The accurate control of UAV flight performance is the basis of UAV operation management.However,due to the large number and variety of UAVs,and the different manufacturers and production conditions,it is very difficult to determine the performance of UAVs by using the performance reporting system adopted by UAVs and aircraft manufacturers.Therefore,it is necessary to establish a set of new UAV performance analysis and research methods,as the basis of building UAV management platform in the future,to meet the needs of UAV safe and efficient operation.Based on this,this paper has carried out the following research:1.Aiming at the Small-scale Unmanned Aerial Vehicle(UAV)with power and without power,this paper proposes a method to analyze the mechanical performance of UAV Based on the track data.This method completely breaks through the traditional measurement method of aerodynamic parameters by means of fluid wind tunnel.The position and attitude data of UAV collected by motion capture system are processed by preprocessing,smoothing,differentiation and other data processing steps.Combined with the simplified dynamic equation,the key factors such as lift coefficient,drag coefficient and roll,yaw,pitch moment coefficient are obtained directly Aircraft dynamics parameters;2.Design and implement the dynamic analysis experiment of small-scale UAV.In this paper,the Vicon motion capture system is selected for two UAVs,i.e.Skylark(unpowered)and Veolia f959(powered).The experimental scheme of position and attitude data acquisition is designed,and the method of measuring the thrust curve of the powered UAV is proposed.Finally,two UAV dynamics parameters are successfully obtained.3.Build UAV motion simulation platform.In the development of UAV operation management system,UAV track prediction,conflict detection and management,path planning and other research needs,this paper will build a motion simulation platform mainly for small UAV on the MATLAB / Simulink platform,and integrate the dynamic parameters of Zhongtian Skylark(UAV)and Weili f959(powered)UAV into the platform The accurate simulation of its behavior is achieved.This paper presents and validates a relatively complete research method of UAV flight dynamics performance,which will provide strong support for the development of UAV management system.