Dynamic Characteristics Analysis And Vibration Control Of Multi-rotor UAV Pan-Tilt

Multi-rotor UAV(Unmanned Aerial Vehicle)is an unmanned helicopter capable of vertical take-off and landing.With the application of multi-rotor UAVs in different fields of different industries,it is accompanied by more and more problems in different industries.Different problems in different fields need to be solved.In order for the drone to better serve the above applications,the drone needs a stable pan/tilt system that can mount various types of shooting equipment or other equipment.First,the vibration reduction gimbal is modeled.The composite carbon fiber sheet,the three-axis gyroscope structure and the rubber damping ball in the vibration-reducing gimbal are simulated and modeled respectively.The ANSYS Workbench composite material simulation module ACP(ANSYS Composite PrepPost)was used to simulate the composite carbon fiber material structure of the cloud platform.Solidworks is used to model,assemble and adjust the center of the three-axis gyroscope structure and camera,and the mass attribute module of SolidWorks is used to calculate the moment of inertia of the three-axis gyroscope structure.The superelastic material rubber ball was simulated by applying two Mooney-Rivlin model superelastic models.Finally,the modeling of the entire vibration reduction platform is realized.After that,the structural strength of the vibration-reducing gimbal was analyzed,and the failure analysis of the carbon fiber plate was carried out.The static analysis results of the vibration-reducing gimbal structure and the structural strength evaluation results of the carbon fiber plate materials in the gimbal structure are obtained through calculation.The structural dynamics analysis of the vibration reduction platform is carried out.The ANSYS Workbench-Mechanical is used to analyze the dynamic modal analysis and harmonic response of the vibration-reducing gimbal.The modal analysis is used to obtain the natural frequencies and vibration modes of the vibration-reducing gimbal.The harmonic response analysis returns to the classical interface for data.Extract the frequency at which the maximum amplitude of the vibration reduction platform is obtained.The same steps were analyzed and compared for the three hardness rubber damping balls using two layouts.Finally,the vibration analysis of the multi-rotor UAV was carried out.The multi-rotor UAV was tested for vibration,and the spectrum of the three directions of the UAV was obtained.The spectrum of the three directions was loaded as a response spectrum.On the vibration reduction platform simulation model,the response spectrum analysis of the vibration reduction platform is performed.Finally,the understanding of the overall vibration of the multi-rotor UAV was achieved.In this paper,the numerical simulation method is used to model and simulate the vibration reduction gimbal of the multi-rotor UAV.The structural strength of the vibration reduction gimbal is checked from the static point of view,and the vibration reduction gimbal is carried out.A series of kinetic analyses were performed for the comparative analysis of rubber damper balls with different layouts using different hardnesses.Although the numerical simulation is ideal,the relative experimental method lacks persuasiveness,but it is also sufficient to qualitatively explain some problems.It has certain engineering significance for the further design and development of the multi-rotor UAV vibration reduction platform.