Results 51 to 60 of about 618,605 (167)

Extended state observer-based integral line-of-sight guidance law for path following of underactuated unmanned surface vehicles with uncertainties and ocean currents

International Journal of Advanced Robotic Systems, 2021
This article focuses on the problem of path following for underactuated unmanned surface vehicles (USVs) considering model uncertainties and time-varying ocean currents.
Mingcong Li, Chen Guo, Haomiao Yu
doaj   +1 more source

Coping with a changing world: the UK Open University approach to teaching ICT [PDF]

, 2008
The rapid pace of change in the ICT field has affected all HE providers, but for the UK Open University (UKOU), used to print-based courses lasting eight years or more, it has been a particular challenge. This paper will present some of the ways the UKOU
Bissell, C C, Williams, J P
core   +1 more source

The Path Tracking Control of Unmanned Surface Vehicles Based on an Improved Non-Dominated Sorting Genetic Algorithm II-Based Multi-Objective Nonlinear Model Predictive Control Method

Journal of Marine Science and Engineering
This paper proposes a multi-objective nonlinear model predictive control (MOMPC) method based on an improved non-dominated sorting genetic algorithm II (NSGAII) for the path tracking problem of unmanned surface vehicles (USVs).
Yunzhe Guo, Qidan Zhu, Jinyou Mou
doaj   +1 more source

Path-Following Control of Wheeled Planetary Exploration Robots Moving on Deformable Rough Terrain

The Scientific World Journal, 2014
The control of planetary rovers, which are high performance mobile robots that move on deformable rough terrain, is a challenging problem. Taking lateral skid into account, this paper presents a rough terrain model and nonholonomic kinematics model for ...
Liang Ding, Hai-bo Gao, Zong-quan Deng, Zhijun Li, Ke-rui Xia, Guang-ren Duan   +5 more
doaj   +1 more source

A look ahead approach to secure multi-party protocols [PDF]

, 2009
Secure multi-party protocols have been proposed to enable non-colluding parties to cooperate without a trusted server. Even though such protocols prevent information disclosure other than the objective function, they are quite costly in computation and ...
Nergiz, Mehmet Ercan, Saygın, Yücel, Çiçek, Ercüment Abdullah   +2 more
core  

Solitons and kinks in a general car-following model

, 2012
We study a car-following model of traffic flow which assumes only that a car's acceleration depends on its own speed, the headway ahead of it, and the rate of change of headway, with only minimal assumptions about the functional form of that dependence ...
B. S. Kerner, Douglas A. Kurtze, I. Gasser   +2 more
core   +1 more source

Secondary Waves, and/or the "Reflection" From and "Transmission" Through a Coronal Hole of an EUV Wave Associated With the 2011 February 15 X2.2 Flare Observed With SDO/AIA and STEREO/EUVI

, 2012
For the first time, the kinematic evolution of a coronal wave over the entire solar surface is studied. Full Sun maps can be made by combining images from the Solar Terrestrial Relations Observatory satellites, Ahead and Behind, and the Solar Dynamics ...
Angelos Vourlidas, Aschwanden, Attrill, Attrill, Attrill, Biesecker, Chen, Chen, Chen, Cheng, Cliver, Cohen, Downs, Downs, Gilbert, Gilbert, Gopalswamy, Gosain, Hudson, Jiang, Jie Zhang, Kosovichev, Kozarev, Li, Liu, Long, Ma, Ma, Narukage, Ofman, Ofman, Oscar Olmedo, Patsourakos, Patsourakos, Petrie, Pohjolainen, Schmidt, Schrijver, Thompson, Thompson, Veronig, Veronig, Veronig, Vršnak, Wang, Wang, Wang, Warmuth, West, White, Wills-Davey, Xin Cheng, Zhao   +52 more
core   +1 more source

A novel active disturbance rejection control with hyperbolic tangent function for path following of underactuated marine surface ships

Measurement + Control, 2020
This paper presents a TADRC method via active disturbance rejection control (ADRC) with hyperbolic tangent function for path following of underactuated surface ships with input constraint, heading rate constraint, parameters uncertainties, as well as ...
Ronghui Li, Baozhu Jia, Shaoyong Fan, Xinxiang Pan   +3 more
doaj   +1 more source

Real-time path planning optimisation algorithm for obstacle avoidance [PDF]

, 2006
This paper presents a new real-time path planning algorithm suitable for implementation on small mobile robots to aid navigation in unknown environments. The Random Obstacle Avoidance (R.O.A) algorithm was developed for small robots and it can be used as
Hur, S., Petropoulakis, L.
core  

A Fuzzy Pure Pursuit for Autonomous UGVs Based on Model Predictive Control and Whole-Body Motion Control

Drones
In this paper, we propose an adaptive fuzzy pure pursuit trajectory tracking algorithm for autonomous unmanned ground vehicles (UGVs), addressing the challenges of accurate and stable navigation in complex environments.
Yaoyu Sui, Zhong Yang, Haoze Zhuo, Yulong You, Wenqiang Que, Naifeng He   +5 more
doaj   +1 more source