Results 101 to 110 of about 53,139 (283)

Using U‐Nets to Predict the Effects of Head Motion on Simulated Specific Absorption Rate for Ultra‐High Field Magnetic Resonance Imaging With Parallel Transmission

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Ultrahigh‐field MRI requires careful management of the specific absorption rate (SAR), which is subject and subject‐position dependent. Within‐scan subject motion may exacerbate local SAR exposure, necessitating large safety margins to prevent SAR underestimation, which hampers imaging performance.
Katherine Anna Blanter, Alix Plumley, Alper Gungor, Shaihan Malik, Emre Kopanoglu   +4 more
wiley   +1 more source

An Adaptive Compound Control Strategy of Electric Vehicles for Coordinating Lateral Stability and Energy Efficiency

Applied Sciences
To enhance the balance between lateral stability and energy efficiency, we propose an adaptive compound controller based on phase plane analysis for four-wheel independent drive electric vehicles (4WID-EVs).
Xia Hua, Kai Xiang, Xiangle Cheng, Xiaobin Ning   +3 more
doaj   +1 more source

PEMODELAN DAN ANALISA YAW-LOCK INPUT MIXER TERHADAP FREE-RUDDER HOVERING MULTICOPTER

Jurnal Ilmiah Informatika, 2017
The main purpose of this research is to compare the response of a modeling and quadcopter implementation when it’s in normal position and given a yaw-lock mixer input with some PID control parameters.
Helmy Mukti Himawan, Panji Peksi Branjangan   +1 more
doaj   +1 more source

Nonlinear speed and yaw control [PDF]

The application of conventional wind turbines on board a vessel creates a number of new challenges for turbine control systems. Thrust force is used in marine applications as an additional control variable for propulsion of the vessel. Variability of the
Stotsky, Alexander
core  

Sliding Mode Control in Aerospace Applications: A Survey

International Journal of Robust and Nonlinear Control, EarlyView.
ABSTRACT Sliding mode control (SMC) enjoys robustness to matched and unmatched (in the case of minimum phase input‐output dynamics) bounded perturbations, and finite time convergence. Second‐order and higher‐order sliding mode control systems (2‐SMC/HOSMC) retain all the advantages of sliding mode control, but in addition can be applied to systems of ...
Yuri Shtessel, Christopher Edwards
wiley   +1 more source

Direct Yaw Moment Control for Distributed Drive Electric Vehicles Based on Hierarchical Optimization Control Framework

Mathematics
Direct yaw moment control (DYC) can effectively improve the yaw stability of four-wheel distributed drive electric vehicles (4W-DDEVs) under extreme conditions, which has become an indispensable part of active safety control for 4W-DDEVs.
Jie Hu, Kefan Zhang, Pei Zhang, Fuwu Yan
doaj   +1 more source

A state-of-the-art review on torque distribution strategies aimed at enhancing energy efficiency for fully electric vehicles with independently actuated drivetrains [PDF]

, 2019
© 2019, Levrotto and Bella. All rights reserved. Electric vehicles are the future of private passenger transportation. However, there are still several technological barriers that hinder the large scale adoption of electric vehicles. In particular, their
Lenzo, Basilio, Sforza, A, Timpone, F
core  

Autonomous Navigation in Large‐Scale Underground Environments Based on a Purely Topological Understanding of Tunnel Networks

Journal of Field Robotics, EarlyView.
ABSTRACT This work presents a non‐geometrical navigation approach based on a purely topological understanding of underground environments. By conceptualizing subterranean scenarios as a set of tunnels that intersect with each other, and taking a navigation approach based on topological instructions, we simplify the navigation problem to the sequential ...
Lorenzo Cano, Danilo Tardioli, Alejandro R. Mosteo   +2 more
wiley   +1 more source

A Study on Sway Stability Control Methods for Tractor-Trailer System Using Rear Wheel Steering

IEEE Access
This paper proposes a control method for a Rear Wheel Steering (RWS) system aimed at improving both the sway stability and maneuverability of vehicles equipped with trailers.
Wanki Cho, Youngsik Yoon, Seung-Han You
doaj   +1 more source

Unsteady aerodynamic analysis of space shuttle vehicles. Part 4: Effect of control deflections on orbiter unsteady aerodynamics [PDF]

The unsteady aerodynamics of the 040A orbiter have been explored experimentally. The results substantiate earlier predictions of the unsteady flow boundaries for a 60 deg swept delta wing at zero yaw and with no controls deflected.
Ericsson, L. E., Reding, J. P.
core   +1 more source