Research On Hybrid Power Driving Technology Of Unmanned Helicopter

In this thesis,a professional single rotor unmanned helicopter is taken as the research object.In order to improve its fuel economy and safety,the hybrid power drive technology is studied.The research on the design of hybrid power system,the research of power allocation scheme,the design and improvement of power allocation implementation scheme,and the modeling and simulation are of great theoretical and engineering significance for improving the endurance and endurance of the unmanned helicopter,and improving the safety and reliability of the unmanned helicopter.The main work of this research is as following:(1)A power system for hybrid unmanned helicopter is designed.Using the original method,the hybrid power system is remodeled on the reference model,and the parameters of the hybrid power drive technology are determined.The parameters of the engine and motor are determined by the market selection of the engine and motor through the analysis and calculation.(2)The hybrid dynamic characteristics of the unmanned helicopter platform are studied and analyzed.According to the power demand of the unmanned helicopter in each flight phase,the working mode of the mixed system is analyzed,and the corresponding matching is done,thus the power allocation scheme for hybrid unmanned helicopter is proposed.(3)According to the proposed hybrid power allocation scheme,a power allocation implementation scheme based on logic threshold control is designed,and the fuzzy control method is used to improve the scheme to form a logic threshold hybrid power allocation scheme based on fuzzy control.(4)According to a typical flight task,the fuel consumption modeling and simulation analysis based on Matlab/Simulink is carried out on the pure oil power system and hybrid power system,and the fuel consumption of the two systems is compared.The simulation results show that the hybrid power system has greater fuel saving than the pure oil power system,and the improved implementation scheme based on fuzzy control has a certain increase in fuel utilization on the basis of threshold control.