| With the growing demand for driving,the number of driving training schools and learnerdriven vehicle also increases.At present,most of the vehicles used in the driving training industry are fuel vehicles.Because the learners are novice drivers,they can’t master the clutch easily,which leads to frequent flameout and start-up in the learning process.Due to the limitation of the field training program of subject 2,the engine of the fuel learner-driven vehicle has been working at low speed or idle for a long time.The mixture of gasoline and air has not been burned sufficiently,and the exhaust gas is harmful to the health of the learnerdriven vehicles and students near the field.Therefore,the development of electric learnerdriven vehicles for driving training has a very positive practical significance.At present,the domestic electric learner-driven vehicles are based on the fuel learner-driven vehicle,replacing the engine with the motor,using the battery to supply energy for the electric learnerdriven vehicle,and its transmission system has not been changed.In this paper,a nontransmission electric learner-driven vehicle is proposed,and its key structure is designed,and the corresponding simulation control method is put forward,so that the non-transmission electric learner-driven vehicle has the same control mode,driving feeling and driving effect as the fuel learner-driven vehicle.The main work of this paper is as follows:(1)This paper takes a fuel learner-driven vehicle as the simulation object,and proposes a non-transmission electric learner-driven vehicle by analyzing the differences between electric vehicles and fuel vehicles in terms of manipulation mode,driving feeling,and driving effect.The driving motor and electromagnetic clutch are selected and matched with parameters.The shift level simulation device,the clutch pedal simulation device and the accelerator pedal simulation device are respectively designed,so that the non-transmission electric learner-driven vehicle has the same operation mode as the fuel learner-driven vehicle.(2)From the perspective of driving effect simulation and driving feeling simulation,the control simulation method of non-transmission electric training vehicle is developed.In the aspect of driving effect,aiming at the working conditions that need to be simulated,the simulation methods of gearshift and change speed,idle speed in neutral and flameout during starting are proposed respectively.In the aspect of driving feeling,the simulation method of clutch pedal force and accelerator pedal force is proposed.(3)This paper researches on the motor speed control method,establishes the control strategy of PMSM maximum torque current ratio based on the expected speed;and the relevant simulation model is built through MATLAB/Simulink.On this basis,a driving intention recognition module and vehicle load calculation module are built to verify the shift function.The simulation result shows the proposed simulation method can simulate the shift function of the fuel learner-driven vehicle.(4)This paper studies the torque control method of the torque motor in the pedal simulation device;analyzes the relationship between the output torque of the torque motor and the voltage at both ends of the armature when the torque motor is locked,and puts forward the torque closed-loop control strategy.Combined with the advantages of fuzzy controller and PID control,this paper puts forward the fuzzy incremental PID control algorithm to control the output torque of the motor,and The model of torque motor torque control system is established through the MATLAB/Simulink.On this basis,the driving intention recognition module is established.The simulation result shows that the proposed force simulation method can simulate the pedal characteristics of the fuel learner-driven vehicle well. |
