Results 131 to 140 of about 252 (156)

Improving Vehicle Handling and Comfort Performance Using 4WS

SAE Technical Paper Series, 2003
<div class="htmlview paragraph">Purpose of this work is to investigate, through a virtual analysis in multi body environment, how to use a four wheel steering system (4WS) to improve vehicle handling and comfort performance.</div> <div class="htmlview paragraph">Working only on rear axle, the idea is to define a suspension layout that
L. Pascali, P. Gabrielli, G. Caviasso
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Robust triangular decoupling with application to 4WS cars

IEEE Transactions on Automatic Control, 2000
Summary: The necessary and sufficient conditions for the problem of robust triangular decoupling (RTD) are established for the case of a linear time-invariant system with a nonlinear uncertain structure. The general analytic expressions of the feedback matrices and the robust triangularly decoupled closed-loop system are derived.
Koumboulis, F. N., Skarpetis, M. G.
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Design of an active 4ws system with physical uncertainties

Control Engineering Practice, 1995
Abstract In this paper a new approach to the design of an active four-wheel-steered (4WS) control system is introduced. The problems of the conventionally used LQ-controller-based virtual model following control strategies are analyzed, and several problems are addressed.
L. Gianone, L. Palkovics, J. Bokor
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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
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Virtual-Point-Based asymptotic tracking control of 4WS vehicles

International Journal of Control, Automation and Systems, 2015
This paper studies the lateral and longitudinal path tracking control of four-wheel steering vehicles. By the introduction of virtual points, a robust and adaptive path tracking control strategy is proposed to simultaneously counteract modeling uncertainties, unexpected disturbances, and coupling effects.
Changfang Chen, Minglei Shu, Ruixia Liu
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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.
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Adaptive Control of 4WS System by Using Neural Network

Vehicle System Dynamics, 1993
SUMMARY An adaptive control system of the model following type is proposed for drive motion control of a four wheel steering (4WS) car with using neural network (NN) which has mastered nonlinear friction force between tire and road surface. A model of one rigid body is adopted which represents appropriately two kinds of car motion caused by steering ...
T. SHIOTSUKA, A. NAGAMATSU, K. YOSHIDA
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Advanced Integrated Control Strategy Based on SBW and 4WS

2009 Pacific-Asia Conference on Circuits, Communications and Systems, 2009
This paper proposes a chassis integrated control system theoretically utilizing SBW system by using 4WS method to improve vehicle handling and stability. With the application of integrated SBW and 4WS strategy, this paper investigates the effectiveness of the proposed control system in enhancing vehicle handling and stability.
Zhu Tianjun, Zong Changfu
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The 4W (What-Where-When-Who) Project Goes Social

2012 Sixth International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing, 2012
The 4W (What-Where-When-Who)project has demonstrated that the combination of rich content delivering devices, such as smart phones, together wireless broadband networking and server side computational power can be used to seamlessly weave a mesh of smart services and intelligent environments providing support to human memory capabilities. Our system is
MIGLIARDI, MAURO, M. Gaudina
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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.
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