Results 41 to 50 of about 2,390,361 (275)

UAV dynamic obstacle avoidance based on improved reciprocal velocity obstacle

Journal of Physics: Conference Series, 2022
Abstract This paper aims to solve the problem that when the UAV flies from the starting point to the target point in the velocity space, the obstacle avoidance speed provided by the mutual velocity obstacle method will appear too large turning angle in order to avoid dynamic obstacles.
Jing Gao, Hongtao Zhang, Li Tan, Xueping Ren   +3 more
openaire   +1 more source

Motion Planning for Mobile Robots Using Uncertain Obstacle Estimation

IEEE Access
The collision-free movement of a mobile robot in the presence of dynamic obstacles remains a significant challenge. In addition to self-localization, we also need to worry about the location of the moving obstacles, taking into account the noise in the ...
Zoltan Gyenes, Barnabas Pajkos, Ladislau Boloni, Emese Gincsaine Szadeczky-Kardoss   +3 more
doaj   +1 more source

Unmanned Aerial Vehicle Obstacle Avoidance Based Custom Elliptic Domain

Drones
The velocity obstacles (VO) method is widely employed in real-time obstacle avoidance research for UAVs due to its succinct mathematical foundation and rapid, dynamic planning abilities.
Yong Liao, Yuxin Wu, Shichang Zhao, Dan Zhang   +3 more
doaj   +1 more source

Collision and obstacle avoidance for agents based on velocity programming in unknown environments under kinematical constraints

IET Control Theory & Applications, 2023
This paper conducts research on obstacle and collision avoidance under kinematical constraints in unknown environments, while communication and simultaneous localization and mapping (SLAM) are unavailable to agents. Then a strategy based on mixed‐integer
Zhigang Xiong, Yasong Luo, Zhong Liu, Jianqiang Zhang, Zhikun Liu   +4 more
doaj   +1 more source

Real-Time Navigation of Nonholonomic Mobile Robots under Velocity Vector Control

International Journal of Advanced Robotic Systems, 2012
In this paper, linear navigation law is studied in depth and we suggest an efficient, practical and simple approach for nonholonomic mobile robot navigation under velocity vector control based on the linear navigation law.
Zi-Hui Zhang, Yue-Shan Xiong, Pei Fan, Yue Liu, Matis Cheng   +4 more
doaj   +1 more source

Motion planner of mobile robots for obstacles in occluded areas

Nihon Kikai Gakkai ronbunshu, 2019
Motion planning for mobile robots considering occluded obstacles is a navigation challenge in dynamic environments. If an obstacle suddenly appears from the occluded area, a robot might collide with the obstacle. This is the occlusion problem. Therefore,
Satoshi HOSHINO, Tomoki YOSHIKAWA
doaj   +1 more source

Finite element examination of hydrodynamic forces in grooved channel having two partially heated circular cylinders

Case Studies in Thermal Engineering, 2020
The present pagination is devoted to report case study on an examination of hydrodynamic forces experienced by partially heated circular obstacles in a grooved channel. To be more specific, the channel is considered as a computational domain.
Khalil Ur Rehman, Qasem M. Al-Mdallal, Aqeela Qaiser, M.Y. Malik, M.N. Ahmed   +4 more
doaj   +1 more source

Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading

Advanced Engineering Materials, EarlyView.
The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

Path Planning for Obstacle Avoidance of Robot Arm Based on Improved Potential Field Method

Sensors, 2023
In medical and surgical scenarios, the trajectory planning of a collaborative robot arm is a difficult problem. The artificial potential field (APF) algorithm is a classic method for robot trajectory planning, which has the characteristics of good real ...
Xinkai Xia, Tao Li, Shengbo Sang, Yongqiang Cheng, Huanzhou Ma, Qiang Zhang, Kun Yang   +6 more
doaj   +1 more source