Design Of Distributed Drive Control System For Mini-Electric Vehicle

Considering the safety and smoothness of mini-electric vehicle,this paper improves and perfects the motor drive control technology of mini-electric vehicle.This paper mainly completes the research and design of distributed drive control system,which uses hub motor as driving motor and electronic differential as control strategy.The main research work is as follows:Firstly,the development status of the micro-electric vehicle industry at home and abroad is studied,and the development process of the mini-electric vehicle drive technology is analyzed.Based on this research,the difference between the centralized drive and the distributed drive control is investigated,and the mini-vehicle is targeted.The distributed drive control system is taken as the research object,and the distributed drive control system scheme with electronic differential control strategy is proposed.Secondly,according to the principle of hub drive motor,according to the characteristics of micro-electric vehicle and the special requirements of running environment,the overall design idea of distributed drive control system is given.According to Ackerman steering geometry,the hardware and software design of the control system are studied,and the electronic differential control strategy based on fuzzy adaptive PID control algorithm is adopted.The design of distributed drive control system for micro electric vehicle is completed.Finally,two kinds of electronic differential control schemes aiming at speed and torque are proposed respectively.Based on system simulation and theoretical simulation,combined with engineering practice,several road tests are carried out,including uniform straight line,acceleration and deceleration,steering and other different working conditions.The comparative test of the two kinds of electronic differential control schemes under the same road condition is carried out,and the test of distributed drive control system is completed.It is verified that the control system can realize the function of electronic differential control well,prevent the slippage of inner and outer wheels when the mini-electric vehicle steers,and improve the driving stability of the mini-electric vehicle.Finally,through the analysis of experimental data,it is concluded that the electronic differential control system based on torque is more sensitive and superior,which ensures the feasibility of the distributed drive control system and the stability of the process.