Results 131 to 140 of about 277 (171)

Development of 4WS Control Algorithm for a SUV

SAE Technical Paper Series, 2002
<div class="htmlview paragraph">Sport Utility Vehicles (SUV) and light duty trucks have gained in popularity for the last several years and the demand for more car-like behavior has increased, accordingly. Two areas for potential improvement are vehicle stability and maneuverability while parking.
Tokihiko Akita, Katsuhiko Satoh, Michael C. Gaunt   +2 more
openaire   +1 more source

Comparison of Feedforward and Feedback Control for 4WS

Vehicle System Dynamics, 1993
SUMMARY A system incorporating feedforward plus feedback control was configured such that it would follow the target yaw rate found by calculation. Selection of optimum values for the control system constants made it possible to separate control of the steering input response characteristic from control of vehicle stability against external ...
H. INOUE, F. SUGASAWA
openaire   +1 more source

4WS and DYC coordinated control for 4WS-4WID autonomous vehicles considering tire nonlinearity

ISA Transactions
To address the issue of path tracking and stability of four wheel steering and four wheel independent drive (4WS-4WID) autonomous vehicles under extreme conditions, this paper proposes a coordinated control method for four wheel steering (4WS) and direct yaw moment control (DYC).
Yuanlong Wang, Jiaqing Zhou, Guanying Chen, Tong Zhang, Changsheng Ma, Rongxian Qiu, Guan Zhou, Chunyan Wang, Wanzhong Zhao   +8 more
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A robust IMC approach for stability control of 4WS vehicles

2007 American Control Conference, 2007
A robust nonparametric approach to improve vehicle yaw rate dynamics by means of a rear active differential is introduced. An additive model set is used to describe the uncertainty arising from the wide range of the vehicle operating situations. The effects of saturation of the control variable (i.e. yaw moment) have been taken into account by adopting
CANALE, MASSIMO, FAGIANO, LORENZO
openaire   +2 more sources

4WS Technology and the Prospects for Improvement of Vehicle Dynamics

SAE Technical Paper Series, 1990
<div class="htmlview paragraph">FOUR-WHEEL STEERING (4WS) is beginning to find widespread use as a new approach to improving vehicle dynamics, especially in the medium and high speed ranges. Steering the rear wheels in the same phase as the front wheels enhances vehicle stability.
N. Irie, J. Kuroki
openaire   +1 more source

Dynamics simulation for 4WS vehicle steering performance

2010 3rd International Conference on Advanced Computer Theory and Engineering(ICACTE), 2010
Considering the nonlinear effects of tyre on the vehicle model, Pacejka tyre model was adopted to set up the 3-D nonlinear dynamic model of four-wheel steering vehicle. Simulations were carried out on the 3-D nonlinear dynamic model for a step input. The simulation results show the advantages of four-wheel steering vehicle.
null Chunhui Liu, null Yadong Meng, null Junbo Zhang, null Chao Kong   +3 more
openaire   +1 more source

Development of 4WS control algorithms for an SUV

JSAE Review, 2003
We have developed various control algorithms to improve drivability for a 4 wheel steering vehicle, especially when towing a trailer. For improving vehicle stability at high speed, a control method that utilizes model matching method and H[infinity] control, was proposed, and its effectiveness was verified.
openaire   +1 more source

Robust control of 4WS actuator using LMI

Proceedings of 35th IEEE Conference on Decision and Control, 2002
The actuator in a 4-wheel steering system must satisfy many control requirements; responsiveness and stability arising from improved vehicle dynamics, robustness against disturbance and noise in the operating environment, reduction of the effects of disparities in component quality, and electric power efficiency.
Y. Fujiwara, K. Hamamoto
openaire   +1 more source

Develop Trajectory Tracking Controller for 4WS Vehicle

2020
This paper applies two trajectory tracking controllers for four-wheel independent steering system (4WS) vehicle. For increase the tracking performance those two controller use vehicle position and orientation as a controller input. And the control output is vehicle linear velocity and vehicle angular velocity.
Koanhee Cho, Yue Ma, Huimin Zhang
openaire   +1 more source

Precise navigation for a 4WS mobile robot

Journal of Zhejiang University-SCIENCE A, 2006
Position and orientation estimation with high accuracy based on GPS and encoders for a four-wheel-steering vehicle (4WS) mobile robot is presented. A GPS receiver working in Real-Time Kinematics (RTK) mode can offer centimeter-level accuracy for our vehicle.
openaire   +1 more source