Development Of A Drive Circuit Applied In Mini Bionic Flapping Wing Aerial Vehicle

Mini bionic flapping wing aerial vehicle can be applied in military reconnaissance,environmental monitoring,geological exploration,personnel search and rescue,crop pollination and other fields.It is the research object of domestic and foreign scientific research institutions currently.Its advantages are its strong engine power,low energy consumption,and flexible and efficient flying mode.However,research on its power source is few and still in the laboratory.In this dissertation,“artificial muscles” piezoelectric materials are used as drive materials for mini bionic flapping wing aerial vehicle.With the goal of efficient energy transfer,relevant drive circuit is designed to convert a low voltage direct current into a high voltage alternating current,to drive the piezoelectric actuator and reduce the circuit losses.This design utilizes the advantage of small energy consumption of the piezoelectric actuator and the energy recovery circuit to improve the energy conversion efficiency of the entire drive circuit.Firstly,this dissertation starts with the domestic and foreign research progress of mini bionic flapping wing aerial vehicle and its drive methods,and relevant drive circuits.Based on previous research,this dissertation introduces the principles and methods of flying at a low Reynolds number for a mini bionic flapping wing aerial vehicle driven by a piezoelectric actuator,and the equivalent model and drive strategy of the piezoelectric actuator.Secondly,this dissertation designs a two-stage drive circuit topology based on DC/DC and DC/AC.The FLYBACK circuit and the conversion circuit based on LC network and half-bridge circuit converts a low voltage direct current into a high voltage alternating current which can drive the piezoelectric actuator.The energy transfer of the circuit is explained theoretically,and the efficiency of the entire circuit is improved by recycling the unconsumed energy in the piezoelectric actuator.And then,based on Arduino open source software and hardware,the driver circuit and its auxiliary circuit are designed.At the same time,the LabVIEW host computer software for controlling the driver circuit is designed,which can control the circuit wirelessly based on the graphical interface.Finally,the prototype of the drive circuit is implemented in this dissertation.The tests about relevant electrical performance and driving the piezoelectric actuator are described,which verifies the correctness and feasibility of this design.The innovative points of this dissertation:The DC/DC/AC drive circuit topology is built with Flyback as DC/DC stage circuit,LC network and half-bridge circuit as DC/AC stage circuit,in which the highest conversion efficiency can reach 84.6%.It can drive piezoelectric bimorph which applied in mini bionic flapping wing aerial vehicle and supports multi-wing expansion.