Road vehicles. Air and air/hydraulic braking systems of motor vehicles, including those with electronic control functions. Test procedures

2006 ◽  
Keyword(s):  
Motor Vehicles ◽  
Electronic Control ◽  
Road Vehicles ◽  
Test Procedures ◽  
Control Functions

Advanced Automatic Steering Systems for Multiple Articulated Road Vehicles

2013 ◽  
Author(s):  
Sebastian Wagner ◽  
Gunter Nitzsche ◽  
Robert Huber
Keyword(s):  
Mechanical Stress ◽  
Kinematic Model ◽  
Steering System ◽  
Guidance System ◽  
Electronic Control ◽  
Road Vehicles ◽  
Control Units ◽  
Steer By Wire ◽  
Automatic Steering ◽  
Multi Body

This article describes a novel automatic steering system for a 30.73m long double articulated bus equipped with three independent steer-by-wire axles. Two model-based control design approaches are proposed. The first approach uses a kinetic vehicle model to design a train-like guidance system and a force-canceling that avoids excessive mechanical stress in the joints and the chassis. While the first approach requires high computational efforts, the second approach utilizes a kinematic model to design an extended Ackermann-steering system that performs well on available electronic control units (ECU). Multi-body-system (MBS) simulations show that both approaches offer high tracking performance and low mechanical stress in the chassis of the vehicle. Furthermore, road tests with the prototype AutoTram® Extra Grand confirm the simulation results.

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