Design Of Power Match And Vibration Isolation For "Fuel-Generation" Multi-rotor UAV

The power system of "fuel-generation" multi-rotor UAV includes motor and propeller,which are actuators,as well as engine and generator,which are power sources.And the match of each component is of great importance to improve the performance of the power system.The vibration caused by the power generation system will negatively impact the control of UAV,so it is necessary to design the vibration isolation system.In this paper,two key technical problems,power match and vibration control,are studied and the main research work includes:(1)Based on the application requirements,the overall design requirements of UAV and an overall design scheme of series type power system are put forward;the characteristic analysis and type selection of propeller and motor as power actuator are conducted;the energy utilization efficiency is optimized;the type of engine and generator are also selected.(2)According to the proposed power scheme,the influence of duty cycle and transmission ratio on power system match is discussed.The matching rule and design parameters of power system are obtained by the characteristic analysis and tests of power generation system and engine output.(3)The vibration measurement experiment platform of the power generation module is designed to analyze the vibration source characteristics of the obtained vibration data.Based on the single-mass multi-degree-of-freedom vibration model,the layout form of vibration isolation system is designed,and the vibration isolation effects of different layout forms are compared through experiments,which verifies the feasibility of the vibration isolation scheme.(4)The power generation module and the frame structure of the UAV are designed,and the rationality of the structure design is verified by simulation;the rationality of power system match and vibration isolation design is verified by the debugging on the ground and flight test of the prototype.