Design And Dynamics Analysis Of Air Base Recovery System For Colony Type Fixed Wing UAV

The main work of this thesis is to design a new type of UAV fixed wing unmanned aerial vehicle(UAV)air base recovery system,and analyze its dynamics to verify the feasibility of the design.In order to adapt to the future colony type UAV cooperative combat mode,improve the efficiency of UAV aerial recovery of small fixed wing UAV,achieve rapid air recovery,and improve the efficiency of UAV aerial combat,based on the research situation at home and abroad,we design a machine back hook type recovery device for air recovery of UAV to achieve efficient and nondestructive recovery of UAV.After the design is completed,the calculation and analysis of the disturbed flow area of the carrier is carried out to obtain the range of the carrier flow,so as to ensure that the recovery collision process occurs outside the spoiler area.Then the whole recovery device is modeled and simulated,and UAV in the recovery process,recovery device on the recovery buffer collision energy absorption efficiency,the whole devi ce generates deformation,stress and strain,and pitching moment generated in the process of collision and interference of aircraft impact are analyzed.After the completion of each simulation,theoretical analysis of the simulation is carried out,and the feasibility of the design is obtained.In the relevant chapters of the paper,the above contents are described in detail.First the paper introduces the research purpose,significance,research status and development trend,and put forward the recovery plan in this paper.Based on the PROE software,the structure design and modeling of the air hook UAV recovery device are carried out.The main subsystems of the recovery unit include: unmanned aerial vehicle,hook device,blocking and buffering device,reco very extension arm and so on.Then,the calculation and analysis of the disturbed flow area of the carrier are carried out based on CFD,and the range of the carrier flow field is obtained to ensure that the recovery device carries out air recovery for the UAV in the range outside the range of the carrier disturbance.Based on that recovery mode is fully established in recovery device on the recycling process of energy absorbing device for detailed modeling,and this device in different impact energy absorption efficiency under the impulse of collision simulation.The recovery speed in a certain range is analyzed,and the buffering energy absorption efficiency of the buffer is very high,and the UAV can be stabilized quickly.Finally,based on the detailed analysis of the recovery process and the force of the recovery unit,the ANSYS WORKBENCH software is used to perform the dynamic modeling of the recovery device.After analysis,we obtain UAV recovery in relative speed below 6m/s,the whole device can with stand the impact of recycling,the recovery process will not have a significant impact on the recovery device,and recovery device is safe and reliable.Then the analysis of pitch torque generated by stretching arm aircraft in the drag effect is carried,and then by the analysis of pitch torque in the collision process of the aircraft is carried in order to verify that the recovery process has no effect to the carrier.