Design And Implementation Of Fuel Cell Multi-Electric Hybrid Power System For Unmanned Aerial Vehicle

Proton exchange membrane fuel cell(PEMFC)is considered as an ideal power source to prolong endurance time of UAV due to its high energy density,cleanness,no pollution,and stability.due to the drastic changes in the load of floating-wing UAV,complex operating conditions,and single Fuel cell cannot meet their power requirements during operation.Therefore,it has great significance to research the hybrid power system and its control strategy to solve the problem of UAV endurance time.This article will focus on the research on fuel cell multi-electric hybrid power system and its control strategy for UAV.The main contents are as follows:Firstly,this paper analyzes the load demand of the suspension wing UAV under different operating conditions.According to the working characteristics of the fuel cell and the power and weight constraints of the power system,the structure of the "fuel cell + battery" type hybrid power system is designed,the parameters of the auxiliary components are selected and design overall scheme of hybrid power system.Secondly,in order to ensure that the output characteristic of the hybrid power system meet the power requirements of the UAV under different operating conditions,the energy dispatching strategy between power modules and the working characteristics of auxiliary components is optimized.Design hybrid power system energy dispatching control strategy,hydrogen supply control strategy,and fuel cell reaction temperature control strategy separately,to coordinately control the stable operation of the hybrid power system.Finally,the UAV 's light-load and heavy-load flight test experiment are designed to analyze energy dispatching control strategy,fuel cell output characteristic,hydrogen supply and fuel cell reaction temperature control strategy for hybrid power systems under different operating conditions.Analyze the performance indicators of the hybrid power system,verify the comprehensive performance of hybrid power system with "fuel cell + battery" structure and its control strategy for the suspension wing UAV.