Results 41 to 50 of about 252 (156)

Four-Wheel Steering Control for Mining X-by-Wire Chassis Based on AUKF State Estimation

World Electric Vehicle Journal
To address the challenges to driving stability caused by large-curvature steering of wire-controlled mining vehicles in narrow tunnels, a fused four-wheel steering (4WS) control strategy based on real-time estimation of vehicle state parameters is ...
Qiang Ji, Yueqi Bi, Mingrui Hao, Jiaran Li, Long Chen   +4 more
doaj   +1 more source

OPTIMAL CONTROL STRATEGY FOR LOW SPEED AND HIGH SPEED FOUR-WHEEL-ACTIVE STEERING VEHICLE [PDF]

Journal of Mechanical Engineering and Sciences, 2015
In this work, based on the optimal control theory approach, a four-wheel-active steering (4WAS) system is proposed for low speed and high speed applications.
M.H.M. Ariff , H. Zamzuri, M.A.M. Nordin, W.J. Yahya , S.A. Mazlan , M.A.A. Rahman   +5 more
doaj   +3 more sources

Longitudinal/Lateral Stability Analysis of Vehicle Motion in the Nonlinear Region

Mathematical Problems in Engineering, Volume 2016, Issue 1, 2016., 2016
We focus on the study of motion stability of vehicle nonlinear dynamics. The dynamic model combining with Burckhardt tire model is firstly derived. By phase portrait method, the vehicle stability differences of three cases, front wheels steering/four‐wheel steering case, front/rear/four‐wheel braking case, and high/low road friction case, are ...
Keji Chen, Xiaofei Pei, Guocheng Ma, Xuexun Guo, Yan-Jun Liu   +4 more
wiley   +1 more source

The Influence of Cargo Moving and Sliding Mode Control Strategy for Forklift

IEEE Access, 2020
Considering the movement of synthetic center of gravity of forklift caused by the cargo moving, a vehicle model including the cargo weight and its moving speed is established.
Zhilu Zhang, Benxian Xiao
doaj   +1 more source

Study of Model Predictive Control for Path‐Following Autonomous Ground Vehicle Control under Crosswind Effect

Journal of Control Science and Engineering, Volume 2016, Issue 1, 2016., 2016
We present a comparative study of model predictive control approaches of two‐wheel steering, four‐wheel steering, and a combination of two‐wheel steering with direct yaw moment control manoeuvres for path‐following control in autonomous car vehicle dynamics systems. Single‐track mode, based on a linearized vehicle and tire model, is used.
Fitri Yakub, Aminudin Abu, Shamsul Sarip, Yasuchika Mori, Yongji Wang   +4 more
wiley   +1 more source

Improving The Manoeuvrability of Electric Vehicle with Four-Wheel Drive and Four-Wheel Steering – A Nonlinear Model Vehicle Dynamics Approach

MATEC Web of Conferences, 2018
The dynamics motion of a vehicle is inherently a nonlinear dynamics system especially at high speed. Majority of past researches on four-wheel steering (4WS) vehicle adopt easier way of modelling a control system based on vehicle with linear dynamic ...
Ishak M.I., Heerwan P.M., Rasid M.A.H.
doaj   +1 more source

Numerical Simulation Analysis of an Oversteer In‐Wheel Small Electric Vehicle Integrated with Four‐Wheel Drive and Independent Steering

International Journal of Vehicular Technology, Volume 2016, Issue 1, 2016., 2016
Similar to conventional vehicle, most in‐wheel small EVs that exist today are designed with understeer (US) characteristic. They are safer on the road but possess poor cornering performance. With recent in‐wheel motor and steer‐by wire technology, high cornering performance vehicle does not limit to sport or racing cars.
Muhammad Izhar Ishak, Hirohiko Ogino, Yoshio Yamamoto, Shankar Subramanian   +3 more
wiley   +1 more source

Soft Sensor of Vehicle State Estimation Based on the Kernel Principal Component and Improved Neural Network

Journal of Sensors, Volume 2016, Issue 1, 2016., 2016
In the car control systems, it is hard to measure some key vehicle states directly and accurately when running on the road and the cost of the measurement is high as well. To address these problems, a vehicle state estimation method based on the kernel principal component analysis and the improved Elman neural network is proposed.
Haorui Liu, Juan Yang, Heli Yang, Fengyan Yi, Jesus Corres   +4 more
wiley   +1 more source

Fuzzy Rule-Based Optimal Direct Yaw Moment Allocation for Stability Control of Four-Wheel Steering Mining Trucks

Applied Sciences
To address the poor trajectory tracking of mining trucks in narrow, high-curvature paths, this study explores the impact of four-wheel steering (4WS) and direct yaw moment control (DYC) on vehicle stability.
Feiyu Wang, Jiadian Liu, Jiaqi Li, Xinxin Zhao   +3 more
doaj   +1 more source

Computer modeling in nonlinear optics: 4W-mixing theory [PDF]

Computers in Physics, 1991
A fully-quantized nonperturbative coherent four-wave (4W) mixing theory and a three-dimensional computer program to solve the model are presented here. A detailed algorithm for the solution, program extension for extra resonances, and plotting techniques are also given.
openaire   +1 more source