Rocket Propelled Launch Takeoff UAV Dynamics And Parameter Optimization

This paper focuses on the launching period of certain unmanned aerial vehicle (UAV) with rocket booster, aiming to improve the flight stability and security. Dynamic simulation and finite element analysis about UAV has been taken during the time from launching along the guide rail to take-off the guide rail, analyzed and optimized the parameters that affect the safety launching of UAV.According to the general requirements of the launch device for UAV, the overall scheme of the container launch of UAV is given, the entity model of vehicle-bone UAV launch system is established with Solidworks software, which makes a preparation for the model of the dynamic simulation and finite element analysis.Dynamic-static method is adopted to establish the launch dynamics mathematical model of UAV launching section, the simulation of the model is conducted with the Matlab software the movement rule of the UAV sliding on the guide rail and the motion parameters of leaving the rail with the conditions of the different guide rail length and the emission Angle is concluded.The model of the UAV launch system for dynamic simulation is established based on ADAMS, by means of that the dynamic characteristics and the effect on collision force between sliding block and guide in conditions of the different rockets installation Angle and the different emission Angle is studied, and the appropriate Angle for rockets installation which can make the UAV flight stability better and avoid intense oscillation is selected.With the finite element method, the explicit dynamic analysis according to UAV in launch section is done, the intensity of each component during the emission process is analyzed, and the topology optimization on the guide rail is carried out in the condition of meeting the requirements of strength, reduced its quality.In this paper, the research achievements will provide certain theoretical basis for the design of launching safety scheme of the UAV.