Dynamic Performance And Configuration Optimization Research Of Fuel Cell UAV Power System

A hybrid power system composed of fuel cells and auxiliary power sources can effectively prolong the drone’s endurance.At present,most of the researches focus on the functionalities of hybrid power system applied to the Unmanned Aerial Vehicle(UAV),and have not conducted in-depth studies on the dynamic output characteristics of fuel cells.Using simple fuel cell control strategy and hybrid power configuration is unable to reach the optimal endurance time of drones.Therefore,changing the control strategy to improve the dynamic performance of the fuel cell and optimizing the hybrid power system configuration to improve the endurance of the UAV have great research value.This thesis will focus on the dynamic performance and configuration optimization of the fuel cell UAV power supply system.The main contents are as follows.For a testing UAV flight platform,the demanding powers of its loads under different working conditions were analyzed.In order to improve the UAV’s endurance,a dual optimization on fuel cell dynamic performance and the weight configuration of its auxiliary power supply was proposed according to the UAV power demand,fuel cell output characteristics,the hybrid power topology and power distribution strategy.In order to improve the dynamic performance of the fuel cell,the main factors that affecting the dynamic performance of the fuel cell were analyzed through experiments.According to the experimental results,the optimization of the hydrogen supply and loading strategy was proposed.The fuel cell was loaded to the rated power under different optimization strategies.The optimization strategies were verified by comparing the voltage response,the changes of voltage consistency and the output power during the loading process.could of the fuel cell.These research results will effectively improve the dynamic performance.The UAV’s endurance objective function was obtained by analyzing the impacts of weight configuration and energy configuration on the UAV’s endurance time.The system weight configuration and hydrogen weight configuration with different types of auxiliary power supplies were obtained by analyzing the power and energy for different types of auxiliary power sources,as well as analyzing the optimal power output of the fuel cell under different optimization strategy combinations.With the endurance objective functions,the optimization of power system configuration was achieved by improving the dynamic performance of the fuel cell,and therefore effectively improve the UAV endurance time.