Parallel Power Source Control Of Oil-powered Multi-rotor Generator

Oil-powered multi-rotor UAV has been widely used in many heavy-duty and longendurance applications due to its advantages such as strong power,long endurance,large loadcarrying ability and convenient energy supplement.With the requirements of industrial UAVs on endurance,load capacity,safety and reliability,oil-powered UAV still has significant advantages in the near future.There was a starter-generator system transform of oil-powered multi-rotor UAV whitch to solve the electrical power supply limition.It used the PMSM to directly connect with the oil-powerd engine.When starting,the motor replaces the DC reduce motor to drive the oil engine starting.After the engine starts,the oil engine drives the generator generating electrical power as a parallel power supply,charge the battery and provide extra power for controller and electrical load on the flight.Based on this system,This thesis focuses on the research of power decoupling control and parallel power balance control.Firstly,according to the high coupling relation between the system and flight operation.The promblem what because of the system coupling and the parallel power supply is listed.And focuse on the research of power decoupling control method and parallel power balance control method.Secondly,Based on the system charactor research,a power management control strategy is designed.It aim to get enough generation power and ensure the flight stability at the same time.A decoupling control stragety is designed to solve the power coupling relationship of oilpowered machine,output of generator and load consumption.A balance control strategy is used for power imbalance problem.A stable and dynamic control strategy is designed for different flight conditions.And also designed a strategy for battery charge.Proof the design with the Matlab/Simulink simulation.Then,The hardware circuit of system is designed in accordance with the requirement of system.Choose the Buck converter as the main circuit.The transfer function of BUCK circuit and the calculation method of its components are studied.And chose the components in accordance with the requirement of system.Forcus on the research and design of Mosfet driver for Buck converter.And proof the design with the Multisim simulation.Finally,designed the test prototype based on the hardware and the software.Done the circuit test and program to realize the strategy on STM32F103C8T6.Test the system on 1/4output.Prove the feasibility of the system.