SUMMARY The four-wheel-steering systems of the cars are becoming more and more wide-spread. In addition to the conventional 4WS systems (e.g. the steering-wheel-angle dependent four-wheel-steering and the speed dependent 4WS) there already exist some so called active 4WS systems. The front wheels and rear wheels are steered autonomously by the feedback compensation and in this manner the behaviour of the car during high-speed turning manoeuvre and under the side wind gust is improved. But what happens if some of the parameters of the car are changed? In the present paper, the author will analyze the system's response when the internal tyre pressure in the rear wheels is lower than the normal. Due to this the under-steered car becomes over-steered and the question is whether the control system is able to stabilize the motion of the vehicle.
[1]
Jo Yung Wong,et al.
Theory of ground vehicles
,
1978
.
[2]
Hideo Takeda,et al.
A Review of Four-Wheel Steering Studies from the Viewpoint of Vehicle Dynamics and Control
,
1989
.
[3]
H Yoshida,et al.
Handling characteristics of four wheel steering cars
,
1988
.
[4]
M Iguchi.
A COOPERATIVE STEERING CONTROL BETWEEN FRONT AND REAR WHEELS IN FOUR-WHEEL-STEERING CARS
,
1987
.
[5]
Thomas Kailath,et al.
Linear Systems
,
1980
.
[6]
M Nagai,et al.
Theoretical study on active four wheel steering system by virtual vehicle model following control
,
2014
.