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In this paper, four-wheel active steering (4WAS), which can control the front wheel steering angle and rear wheel steering angle independently, has been investigated based on the analysis of deficiency of conventional four wheel steering (4WS). A model following control structure is adopted to follow the desired yaw rate and vehicle sideslip angle, which consists of feedforward and feedback controller...
Chassis control systems have evolved dramatically over the past two decades and their impacts on vehicle dynamics can be usefully separated into the three directions, i.e. lateral, longitudinal and vertical directions. Accordingly, the state survey of chassis control systems can be reviewed in following sub-system areas, i.e. steering, driveline/braking and suspension. The developments within each...
The yaw stability of a vehicle is crucial to vehicle safety in steering manoeuvres. In this paper, a fuzzy-logic controller is designed for improving vehicle yaw stability by corrective yaw moment generated from differential braking so that the yaw rate and body sideslip angle can trace their desired values. An 8-DOF vehicle model with nonlinear tire characteristic is developed to capture the vehicle...
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