Design And Research On Drive Control System For Independent Wheel-driving Electric Military Vehicle

Weapon equipment plays a crucial role in enhancing the combat effectiveness of the troops.Compared with the traditional diesel engine,the independent wheeled military electric vehicle eliminates the traditional mechanical transmission system,which enables the motor to be directly connected with the wheels.It makes the transmission lines to be short,and the vehicle is of light weight and good maneuvering performance.At the same times,on account of small noise,less thermal radiation and good wartime concealment,it will be more able to meet the needs of modern battlefield.Independent wheeled military electric vehicles will be the development direction of military electric vehicles in future.In the present research project,the four-wheel independently-driven off-road vehicles were selected as the object,and simultaneously we mainly focused on the design and analysis of the drive system.On the basis of the parameters and driving conditions of the off-road vehicles,the wheel motor driving device,the structure of the vehicle and the related control strategy were designed and analyzed.Combined with the relevant parameters of the "warriors" off-road vehicle,the independent wheel driving system was adopted,and that driving system drove the wheels through the permanent magnet brushless DC motor,the planetary gear reducer and McPherson independent suspension.Then,the structure of reducer and suspension was designed and the 3D design of the automobile was carried out by using SolidWorks software.In the planetary gear reducer design,the gear tooth was calculated and strength checking of each gear was also carried out.Besides,the reducer adopted the floating ring gear structure,which improved the load distribution uniformity.In the suspension design,the hard points in the horizontal and vertical plane were respectively designed and calculated.After that,the suspension was made kinematics simulation in Adams/Car.Finally,the four wheel steering control strategies of electric vehicle were designed and the analysis on the time-domain,frequency-domain and stability of the control system were carried out in MATLAB/Simulink.