Results 121 to 130 of about 252 (156)

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

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

Niño 4 West (Niño‐4W) Sea Surface Temperature Variability

Journal of Geophysical Research: Oceans, 2021
AbstractSea surface temperature (SST) variability in the western half of the Niño 4 region (Niño‐4W), bounded by 160°E−175°W and 5°S–5°N, has a significant impact on weather and the marine environment of the Indo‐Pacific. It exhibits significant negative skewness, with the strong penetration of the cold tongue into the western Pacific during strong La ...
Ming Feng, Ying Zhang, Harry H. Hendon, Michael J. McPhaden, Andrew G. Marshall   +4 more
openaire   +1 more source

4W high performance 1470 nm InGaAsAs lasers

SPIE Proceedings, 2016
We report on our design and fabrication of 1470 nm high power InGaAlAs quantum well lasers. It is found that the 2-mm-long-cavity devices with aperture size of 96 μm can reach maximum power of around 4.2 W. The threshold is around 500 mA, and slope efficiency is about 0.42 W/A.
Bocang Qiu, Weimin Wang, Wenbin Liu, Chuzhong Zhao, Langxing Kuang, Chunyu Miao, James Ho, H. Martin Hu   +7 more
openaire   +1 more source

Virtual Prototype Co-Simulation of 4WS Vehicle

Advanced Materials Research, 2011
A new 4WS vehicle model is set up by means of revamping a foreign FWS model. Co-simulation is completed by loading 4WS mechanical model as a subsystem which is built to express the characteristics of physical model of vehicle in ADAMS/Car into the control system modeled in MATLAB.
Wei Wei Wang, Jian Feng Xu
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

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

The 4W framework for B2B e-contracting

International Journal of Networking and Virtual Organisations, 2003
Contracts are fundamental to the engagement of companies in commercial relations. B2B electronic contracting aims to improve the efficiency and effectiveness of the contracting process and to provide new opportunities for the contracting parties. Virtual enterprises, for example, can be dynamically formed on the basis of e-contracts.
Angelov, Samuil, Grefen, Paul
openaire   +3 more sources

Parameter optimization for decoupling controllers of 4WS vehicles

Artificial Life and Robotics, 2013
In this paper, performance analysis of physical models and parameter optimization of two typical decoupling controllers are considered. Firstly, new relationship between velocity and acceleration for the nonlinear performance is established. Then, for the decoupled quasi-linearized system, the parameter region is optimized, in which the damping is ...
Mingxing Li, Haijing Xu, Yingmin Jia
openaire   +1 more source

A 4W Model of Wisdom and Giftedness in Wisdom

Roeper Review, 2021
We propose that wisdom should be considered in understanding, identifying, and developing skills of thought translated into action in gifted children and adults.
Robert J. Sternberg, Sareh Karami
openaire   +1 more source