A comparative study of different yaw stability control strategies with different road condition and handling maneuver

Yaw stability control system helps vehicle to improve the cornering performance during high speed. There are two control objective for improving yaw control performance i.e. yaw rate and side slip angle. The main aim of yaw stability demand to get appropriate yaw rate maintaining side slip angle during cornering. The loss of yaw stability results in oversteer and understeer phenomena which is undesirable. In this paper first a seven-DOF vehicle is linearized to a bicycle model. Three different industrial control strategy i.e. Active steering with PID control, Active steering with fractional PID control and an optimal control based Linear Quadratic regulator (LQR) is used for maintaining yaw stability. In order to evaluate the robustness of the controller variation of road condition is taken care of. For testing vehicle in realtime scenario it is tested with two different road maneuver. The complete design of simulation model is done in matlab environment.