Study On The Overall Design And Performance Of Hybrid-driven Underwater Unmanned Vehicle

Hybrid-driven Unmanned Underwater Autonomous Vehicle is the latest UUV in the world,which combines the advantages of underwater glider and autonomous underwater vehicle.It can be used in underwater gliding mode to fulfill the observation requirements of large voyage and long time series,and can also be used to promote the mode movement to accomplish the exploration of specific areas.In view of China's marine development strategy,China needs a number of different types of autonomous unmanned underwater vehicles to establish a three-dimensional and three-dimensional ocean observation network.Based on the National Pre-Research Fund,a new hybrid-driven autonomous underwater vehicle is developed for China's marine development strategy.The shape of the vehicle is designed by bionic ray,which has the characteristics of large wingspan.It has the advantages of high lift-drag ratio,high stability and strong carrying capacity of the flying wing underwater glider.It also has the advantages of high flexibility and good maneuverability of the ordinary underwater glider.It is a new type of unmanned underwater autonomous vehicle.Unlike the ordinary autonomous underwater vehicle with a propeller at the tail,the vehicle also carries a propeller symmetrically under the hydrofoil,which can greatly improve the maneuverability and rotation in water,and can complete horizontal propulsion,space circular motion and space spiral motion in water.It can also break through the current international sea area,ordinary underwater robot can not break through the mesoscale vortex.The vehicle is the only new type of unmanned underwater autonomous vehicle in the world.In this paper,after fully investigating the research situation of underwater vehicles at home and abroad,the overall design and internal system unit design of the vehicle are carried out by combining modular design with CFD numerical calculation.On the basis of the overall design,the hydrodynamic characteristics of the vehicle and the coupled motion analysis of the vehicle and the propeller are completed.Finally,the design objectives of the vehicle are accomplished by iteration of the two methods,and the related equipment is selected.This provides a research basis for the construction of the control system and the assembly of the real aircraft,and further verifies the correctness of the design method and the validity of the CFD numericalcalculation method.The main achievements and innovations of this paper are as follows:This paper presents an innovative design method of a new hybrid-driven autonomous underwater vehicle,and designs a new hybrid-driven autonomous underwater vehicle.The maximum working depth of the vehicle is 1000 m underwater,the maximum propulsion speed is 1.5 kn,and the maximum endurance is300 km.The design methods of modular design,three-dimensional solid modeling and CFD numerical simulation are used to complete the design of the shape of the vehicle,pressure hull,buoyancy control system,attitude control system,control system,propulsion system and launch system.Based on the statics calculation,the optimization among the systems and the assembly of the whole model are completed.Based on the overall design of the vehicle,the force analysis of the vehicle is carried out,and the CFD numerical simulation method is used to complete the hydrodynamic performance calculation,the optimal angle of attack calculation and the open water performance prediction of the propeller.On the basis of dynamics,a six-degree-of-freedom mathematical model of space motion of the vehicle is established.The dynamic performance calculation of the coupling between the body of the vehicle and the propeller is completed by using the CFD numerical simulation method and the technology of dynamic mesh,sliding mesh and multi-computational domain.The motion characteristics of the vehicle in propulsion mode and glide mode are calculated.This paper combines modular design,three-dimensional modeling and CFD numerical simulation,and finally completes the innovative design of the large wingspan hybrid-drive autonomous underwater vehicle,and simulates the movement in actual engineering.On this basis,the selection of the vehicle equipment is completed,which provides important guidance for the construction and debugging of the vehicle control system,the manufacture and assembly of the real aircraft.