Study on the ESP System Based on Fuzzy Logic PID Control and Multibody Dynamics

An electronic stability program (ESP) system for passenger cars can be utilized effectively to stabilize a skidding vehicle and thus make the vehicle more controllable to reduce the risk of traffic accidents and to improve driving safety. In this paper, a vehicle multi-body dynamic model constructed using MSC. ADAMS/Car is adopted to investigate the reliability of the ESP system. To improve control performances, controllers used in the ESP system are designed according to fuzzy logic and PID control theory. Then, a joint simulation model is established in a MATLAB/Simulink environment, in which the ESP control module is embedded into the vehicle dynamic model achieved from ADAMS/Car. After establishing the joint model in the ADAMS/Car environment, experimental simulations can be conducted by step steering, ISO emergency double lane change, and fish hook tests to study various vehicle behaviors with the developed ESP system. The simulation results demonstrate that the designed ESP system can improve vehicle handling and stability and assist in adapting to various roads and driving conditions.