Evaluation Of Vehicle Braking Sensation Based On Driver Model

With the rapid development of the world economy,people’s demand for transportation has increased greatly.However,due to the exhaust pollution problem of internal combustion engine vehicles and the shortage of fossil energy,electric vehicles have become the research hotspot of the current automobile industry.Electric vehicles are usually equipped with a braking energy recovery system to convert the kinetic energy in the braking process of electric vehicles into electric energy for recovery,so as to improve the range of electric vehicles.Due to the intervention of regenerative braking in electric vehicles,the driver’s braking sensation is likely to change.Therefore,the driver’s braking sensation is an important factor to accurately evaluate the driver’s braking intention.This paper presents an analytical evaluation method of electric vehicle braking sensation based on human-vehicle integrated model.The relationship between the key parameters of the driver model and the driving sensation is explored by establishing a driver model which can reflect the braking sensation.Relevant studies have been carried out as follows:(1)Establish a driver model containing key parameters and determine the algorithm for parameter identification.Firstly,a driver model reflecting the driver’s previsionfollowing braking behavior was established under braking conditions,and a driver-vehicle closed-loop control system model was established according to the theoretical model.According to the brake pedal force under the driver and the brake pedal force output by the driver model,the characteristic parameters of the driver model were identified with the goal of minimizing the deviation between the two.(2)Explore the relationship between the key parameters of the driver model and the driver’s braking sensation.Based on the braking tests of vehicles with different braking characteristics under the same braking conditions,the driver model parameters identified from the subjective evaluation results and corresponding experimental data were compared and analyzed to clarify the relationship between the key parameters of the driver model and the driver’s braking perception.(3)Exploring the analytical evaluation method of braking sensation based on drivervehicle model.Key parameters according to the pilot model and the driver braking feeling relations,through the pilot-vehicle closed-loop model simulation under braking condition,to explore the vehicle brake system key parameters of driver model the influence of key parameters,based on the pilot model,the relationship between the key parameter and the driver braking feeling of the vehicle brake system parameters affect the driver braking feeling.Thus,an analytical evaluation method of braking sensation based on driver-vehicle model is obtained.