Results 61 to 70 of about 35,722 (281)

An optimal nonlinear guidance logic for the trajectory tracking of supercavitating vehicles [PDF]

, 2017
Supercavitating vehicles (SV) are a class of high-speed autonomous underwater vessels. They present a great challenge in designing the guidance law in comparison with the traditional autonomous underwater vehicles.
Gao, Ke, Song, Jia, Yang, Erfu
core   +1 more source

Perfusion Bioreactor Culture Incorporating Mechanical Confinement Enhances Mesenchymal Stem Cell Extracellular Vesicle Production and Wound Healing Potential

Advanced Materials Technologies, EarlyView.
Scalable manufacturing challenges and limited potency remain two of the most intransigent issues limiting clinical translation of EV therapeutics. Mechanical cues can induce phenotypic changes and increased vesiculation in EV source cells without the use of extraneous reagents, chemicals, and/or cargo, thereby potentially drastically improving the ...
Emily H. Powsner, Raith Nowak, Stephanie M. Kronstadt, Nicholas H. Pirolli, Talia J. Solomon, Kristin Nikolov, William Pieper Holeman, Ian M. Smith, Kimberly M. Stroka, John P. Fisher, Steven M. Jay   +10 more
wiley   +1 more source

Fault-Tolerant Model Predictive Control for Autonomous Underwater Vehicles Considering Unknown Disturbances

Journal of Marine Science and Engineering
This paper presents a fault-tolerant model predictive control approach for cross-rudder autonomous underwater vehicles to achieve heading control, considering rudder stuck faults and unknown disturbances.
Yimin Chen, Shaowen Hao, Jian Gao, Jiarun Wang, Le Li   +4 more
doaj   +1 more source

The Nurturing of Seagliders by the National Oceanographic Partnership Program [PDF]

Oceanography, 2009
The National Oceanographic Partnership Program provided critical support to the development of Seaglider long-range autonomous underwater vehicles. This support enabled: (1) development and integration of chemical and biological sensors, (2) transition ...
Charles C. Eriksen, Mary Jane Perry
doaj  

Acoustic positioning and tracking in Portsmouth Harbour, New Hampshire [PDF]

, 2007
Portsmouth Harbor, New Hampshire, is frequently used as a testing area for multibeam and sidescan sonars, and is the location of numerous ground-truthing studies. Having the ability to accurately position underwater sensors is an important aspect of this
Huff, Lloyd C, Mayer, Larry A., McGillicuddy, Glenn, Schmidt, Val E., Weber, Thomas C., Weirathmueller, Michelle   +5 more
core   +2 more sources

Fully autonomous underwater spy-vehicle

Journal of High School Science, 2023
In recent years, nations have adopted technology as a means to excel. Technological competition among developed countries has begun to filter to the forefront in other fields. Efforts to stay up to date in a geopolitically changing world order include technological advances in military technology.
Ali K Kozluca, Can Demirdelen, Kerem B Bozkurt   +2 more
openaire   +1 more source

On–Off Switchable Micromotors for Use in Steerable Microvehicles

Advanced Robotics Research, EarlyView.
Electrically controllable micromotors and microvehicles are developed by tuning the diffusion of the fuel. Self‐propelled micromotors using bubble propulsion show great promise for miniaturized devices with multiuse purposes such as cargo delivery and sensing. However, there is currently no method to electrically switch the micromotors on or off. Here,
Hugo Severinsson, Eswaran Murugasen, Jose G. Martinez, Edwin W. H. Jager   +3 more
wiley   +1 more source

Navigation Control and Signal Processing Methods for Multiple Autonomous Unmanned Systems

Applied Sciences
Autonomous underwater vehicles (AUVs) have been widely deployed in numerous underwater applications, such as biological monitoring, oceanographic surveys, and military underwater surveillance [...]
Haoqian Huang, Bing Wang, Yuan Yang
doaj   +1 more source

Underwater Docking Approach and Homing to Enable Persistent Operation

Frontiers in Robotics and AI, 2021
One of the main limiting factors in deployment of marine robots is the issue of energy sustainability. This is particularly challenging for traditional propeller-driven autonomous underwater vehicles which operate using energy intensive thrusters.
Brian R. Page, Reeve Lambert, Jalil Chavez‐Galaviz, Nina Mahmoudian   +3 more
doaj   +1 more source

Formation Control of Multi‐Agent System with Local Interaction and Artificial Potential Field

Advanced Robotics Research, EarlyView.
This article proposes a local interaction‐based formation control method for Multi‐Agent system, integrating consensus and leader‐follower strategies with a stress response mechanism—artificial potential field to reduce communication overhead and enable obstacle avoidance. Experimental results on triangular, square, and hexagonal formations confirm its
Luoyin Zhao, Zheping Yan, Yuqing Wang, Raye Chen‐Hua Yeow   +3 more
wiley   +1 more source