Vehicle Handling Improving By Active Steering

Abdul Hafiz, Ab Aziz (2009) Vehicle Handling Improving By Active Steering. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

This PSM project is about improving handling behavior of car by using active fiont steering. Active Front Steering (AFS) is a newly developed technology for passenger cars. It provides an electronically controlled superposition of an angle to the hand steering wheel angle that is prescribed by the driver. This additional degree of freedom enables a continuous and driving-situation dependent adaptation of the steering characteristics. At the heart of the new Active Steering system is the planetary gear set integrated into the steering column. An electric motor in the joint adjusts the front wheels' steering angle in proportion to the vehicle current speed. This active steering is evaluated by simulating different steering inputs. The active steering solution has been implemented in MatlabISimulink. A vehicle model is also implemented in Matlab/Simulink. This paper focuses on comparison both two systems: a conventional vehicle and a controlled vehicle. Simulation is made for a constant speed and a specific changeable road adhesion coefficient. The motivation for this work is to understand and characterize the response of a vehicle with a complementary steering system. Improved stability is obtained for the vehicle during slippery road driving.

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