Integrated Vehicle Dynamic Control for an Electric Vehicle by Independent Four-Wheel Traction Torque and Braking Force Control
Date Issued
2011
Date
2011
Author(s)
Shyu, Yun-Chieh
Abstract
The purpose of this paper is to establish and to investigate a Vehicle Dynamic Control Strategy for an independent four-wheel driven electric vehicle. This strategy achieved those functions of Traction Control System (TCS), Anti-Slip Braking Control (ASBC), Active Yaw Control (AYC), and regenerative brake by integrating traction torque control, braking force control, and four-wheel torque distribution.
In recent years, many research organizations and car manufacturer started electric vehicle (EV) development due to oil crisis and global warming problems. Compared to Internal Combustion Engine Vehicles (ICEV), EVs can not only reduce petroleum usage and greenhouse gas emission, but also have great potential in two aspects. First, electric power systems can recover vehicle kinetic energy during braking, which is beneficial to extend range and reduce wear of mechanical brake unit. Second, electric power systems have faster and more precise response than gasoline engine systems. Electric power systems are also capable to be arranged as independent four-wheel drive, which has high degrees of freedom for vehicle dynamic control.
In this study we make use of those advantages mentioned above, and integrated TCS, ASBC, AYC, regenerative brake controller in Vehicle Control Unit (VCU) software, which formed a complete vehicle dynamic control system. Then, an independent four-wheel driven EV dynamic model is built up using MATLAB/Simulink and CarSim. This model is use to test and verify controller performance in simulation.
Subjects
electric vehicle
four-wheel drive
vehicle dynamic control
regenerative braking
Type
thesis
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