Design And Simulation Analysis Of Rope Hook Recovery System For Small Fixed-wing UAV

Rope-hook recovery technology is a kind of fixed-wing UAV recovery technology that has emerged in recent years in China.It has the advantages of high recovery efficiency,short preparation time and low requirement of recovery site.It can be used on both land-based and ship-spaced narrow platforms.This paper studies the feasibility of the recovery technology and designs a rope-hook recovery system for the recovery of a small-sized fixed-wing UAV.Based on the principle of rope hook recovery,the dynamic model of the recovery system of the UAV rope-hook is established through the force analysis in the process of blocking and recovery,the velocity and the blocking force of UAV are simulated by the 4/5th Runge-Kutta solver in MATLAB Simulink.Use various parts of the mechanical library of the simulation software AMESim to build a recycling model at the same time.Both simulation results confirm the safety and reliability of the design,and confirm that the rope0-hook recycling technology can complete the recycling in a short time.The bending wave theory in rope dynamics is introduced to analyze the initial stage of recovery,the propagation of stress wave on the rope and the influence of bending wave on the blocking effect of the system.The mathematical models are established for the phase of the separate action of the blocking rope and the phase of the blocking rope and the elastic rope.Taking the time increment is taken as the iterative parameter,the interrelation and influence of the parameters in each time are fully considered in the mathematical model of the two cases.The Simulink software is used to build the simulation environment and carry on the simulation analysis.The simulation results show that the recovery performance of UAV rope hook is good,and it is a new recovery technology worthy of development.