Search Results

Active Front Steering (AFS) systems have recently been introduced for passenger vehicles to improve handling stability under adverse road conditions. AFS provides a mechanism to augment the steering angle with a small displacement actuator. In this configuration, the steering angle of the front wheels is the combined input of the handwheel with an additional small angle component from an electronically controlled actuator. This paper investigates AFS for large trucks to assist in avoiding jackknife conditions. Emphasis is given to design aspects to minimize the tendency of AFS systems to interfere with the driver's perception of the vehicle responsiveness.

Throughout the past decades, control system philosophies have centered around very basic hardwired relay logic. Many changes have occurred, starting with the introduction of the programmable controller to the latest, state of the art, distributed control systems. Realizing the importance of lessons learned from past and present control systems, new requirement goals were established as the path of the new systems. A flexible, modular, compatible, and expandable architecture was the desired foundation of our Next Generation Control System. Current technology allows for a distributed control inputs/outputs and greater processing speed is realized using this approach. A graphical user interface with real time trending, data logging, network communications, real time statistical process control, and knowledge based systems are major items in the Next Generation Control System.