Design And Analysis Of Catapult Launched Folding Wings Flying Robot

Currently, flying robots are widely used in the military field, but large-scale UAV’s take-off mode, damage to civilian property limit their application in urban warfare and the war on terror. This paper designed a catapult lauched folding wings robot and its catapult which can take off in rough terrain or confined spaces, for reconnaissance and precision strike missions.Firstly, the structure of the folding wings flying robot was designed and electronic control system components were selected. The tandem wing configuration and overall size was determined to meet requirements of flying robots. And selected the parameters of the airfoil wing due to the required wing lift coefficient. Structure is designed for flying robot including a folding wing structure, using a multi-chip stacked structure to achieve the accuracy of the positioning, reliability of locking and rapidity of expanding. electronic control system components are selected. Fluid force was simulated using Workbench software. The required angle of attack and thrust flying robot at each flight velocity were calculated using Fluent and FSI. the forces coupled with the aerodynamic were analyzed for optimization.Secondly, three power systems were developed: conventional power system, motor vector system and propeller vector system. Determined the parameters of the motor and propeller for conventional power system, and its level flight performance and maneuverability were modeled and analyzed. Model of motor vector system was built, maneuverability can be improved compared to conventional power system, And designed a motor vectored thrust mechanism; Modeled and analyzed the propeller thrust vector system propeller thrust and torque using blade element theory. And verified the feasibility of the thrust and control torque using the six-dimensional experiment platform.Thirdly, a stretch type catapult is developed. The ejection process modeled and analyzed. And the relationship of ejection velocity, ejection distance and modulus of elasticity is figured out. Elastic component parameters is selected. the actual ejection speed and the theoretical speed are compared through experiment.Finally, 5 flying robot prototypes were produced for testing. The validity of the catapult feasibility and folding wing and the stability and handling of the flying robot was verify.