Development of the Rotational Stability in the Vehicles Using an Active Differential System Based on the Optimal Control

This paper investigates the improvement of the vehicle dynamics performance by the use of a rear limited rationing differential. A front antilock braking system will support active differential in generating yaw moment, if necessary an optimal linear quadratic regulator (LQR) controller is employed together with an elaborate four-degree-of-freedom (4-DOF) linear vehicle model. Simulation results based on 9-DOF nonlinear vehicle model, magic formula in different maneuvers, and the road conditions show the capability of a new integrated controller in keeping stability in the various conditions in the road and drive.

Keywords:

optimal control , LQR control , active differential