System Design And Propulsion Efficiency Analysis Of Mini-type Modular AUV

There is important strategic significance in the ocean.More attention about marine development have been paid to by many countries.Because of the working mode and application development prospects,autonomous underwater vehicles(AUVs)are widely used in large quantities of marine exploration and military investigation tasks.Due to the various mission requirements,a large and small variety of AUVs have been born.With the deepening of development requirements,the fixed configuration of AUV is difficult to meet the needs of the development process.Through the modular design,the mechanical interface and electrical of the module can be realized.Unified planning of interfaces,communication protocols,and upper-level software facilitates the upgrade and replacement of functional loads,facilitating technical upgrades and reuse of AUV platforms.In terms of actual usage and cost,large AUVs are used in small quantities and are expensive to use.On the contrary,small AUVs are easier to develop and promote.This paper mainly designed and developed a small modular AUV for marine observation needs,and analyzed the efficiency of its propulsion system to improve the efficiency of platform operation.Firstly,this paper discusses the development status of AUV at home and abroad,introduces the diversified use of AUV,points out the significance of developing small modular AUV,and finally draws the design goal according to the AUV's propulsion form,and completes the AUV.The overall shape design co Mpares the layout of the rudder and analyzes its navigational resistance.Secondly,this paper analyzes the small modular AUV internal transmission system,analyzes and solves the O-ring dynamic sealing force when the rudder shaft is driven,and calculates and co Mpares the magnetic coupling transmission mode selected by the propulsion system through the finite element.The performance of the axial magnetic coupling and the radial magnetic coupling with multi-parameter changes in the equal volume state is co Mpared.The final scheme is selected by co Mparison.Finally,this paper makes an overall analysis of the transmission efficiency of the propulsion system,and then analyzes the radial magnetic coupling efficiency in detail,and co Mpares various factors such as eddy current loss and seawater resistance loss of the isolation sleeve.In the case of small AUV,the eddy current of the isolation sleeve accounts for the main loss,and the eddy current loss can be reduced by reducing the output rotation speed and reducing the wall thickness of the isolation sleeve.After co Mparison experiments,it was verified that the eddy current loss of the magnetic coupler was controlled to a small range.And completed the AUV overall lake experiment,which verified the overall performance of the AUV is reliable.