Research On Modeling And Simulation Of Parallel Hydraulic Braking Energy Regeneration System On AEMSim

With the rapid development of society, the demands of human for cars are increasing daily. At the same time, the cars also bring some problems. Such as increasing energy and environmental problems, traffic accidents, so it's very important to research how to reduce energy consumtion and pretect car safty.This paper studied on the Braking Energy Regeneration System according to the Urban taxis'working condition. Compared with the existed energy storage form, then carried out the hydraulic energy storage technology, and selected the form of parallel driving, designed hydraulic system. According to the demands of Braking Energy Regeneration System, analyzes the deficiency of the constant pump/motor, proposed that take the variable pump/motor as energy conversion components. According to the principle of pump work, and energy conservation and conversion law, we ensure control form of the variable pump/motor-proportion control pump. According to comparative analysis all forms of accumulator, we select accumulator airbag as energy recovery device and analyzed its principle. In order to make Braking Energy Regeneration System can play the role of brake, matched the parameter of variable pump/motor, and accumulator.Basis on the dynamic distribution theory, we conduct force analysis of the car for braking. According to the size of the braking intensity, the pressure of accumulator, we can coordinate control the rear hydraulic pressure brake torque-friction braking torque and regeneration of brake torque, puts forward the maximum braking energy recycling braking force distribution strategy and control strategy.Based on the principle of automatic control technology, established the variable pump/motor control system of the mathematical model and the transfer function, established the anti-lock control system model braking of energy regeneration and the ABS control model.Used the PID control technology debugged the control system and ddbugged the parament of all PID model.We established the simulation of the main components of car,brake cylinder, ABS hydraulic brake, wheel cylinder, wheels, the automobile with four wheels, road surface, hydraulic braking energy recovery system, and the simulation model of logic control system by AMESim software. Devoloped 12 kinds of simulation conditions and introduced the braking performance evaluation. The simulation results indicate that when only used Parallel HydraulicBraking Regeneration System to brake, it can prevent wheels from locking and make autocar have a good stability. Brake torque from min to max only use 0.3 seconds which meet the stanrdant of nation brake, so it can play a role as equivalent brake system. When Combined brake, the simulation results show that Parallel HydraulicBraking Regeneration System can work together with hydraulic brake system, which can prevent wheels from locking in the all developed simulation conditions and meet the braking performance evaluation. Differents of road adhesion confficient and brake intension will inpact on regenerative system. The simulation results show that regenerative system can absorb 80%-84%of total energy when only brake, Combined brake can absorb 33%-47%of total energy.