Abstract
A steering aid system called active steering is evaluated by simulating different kinds of driving events. The main purpose of the steering system is to allow the driver control the vehicle independently. A full car vehicle model is simulated in Matlab/Simulink with 14 degree of freedom of equations which include the ride vehicle model and also the handling model. The steering angle is the input of the vehicle model that should be focused on. The angle of the steering system between the tires when turning the vehicle is taken in consideration. Simulations are made on different road conditions effect and also side wind disturbances. Different values are applied to the simulation to reduce the effect of the driving events. Therefore, these simulations results to provide a better improvement to the steering system. The aim for this work is to validate the vehicle response with an instrumented experiemental vehicle. Specific driving events in these simulations are the road adhesions and lateral side wind disturbances.
Highlights
In an age of advanced technology, automobile is a life’s necessity
For the past few decades, the development of steering system has tremendously experienced many stages and the steer by wire system is the latest technology of steering system for passenger cars
Active front steering system is the latest technology for passenger cars which implements an electronically controlled superposition of an angle to the hand steering wheel angle that is
Summary
In an age of advanced technology, automobile is a life’s necessity. It acts as a transportation to travel for a distance no matter a short or long journey. AFS enables continuous and situation dependent variations of the steering ratio according to the vehicle's motion state, AFS improve the manoeuvrability of the vehicle at low speed and the stability at high speed. The performances of stability improvement with active suspension system depend upon the quality of variation of the steering ratio to a certain extent. A controller of variable steering ratio for Active Front Steering system is designed, and virtual road tests are made in CarMaker driver vehicle-road simulation environment. The results of simulation tests validate the controller performance and the advantage of variable steering ratio function, show that the driving comfort is improved at low speed especially, due to the Active Front Steering system alters the steering ratio according to the driving situation [9, 10].
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