Results 91 to 100 of about 22,066 (299)

Trailer-Maneuverability in N-Trailer Structures

IEEE Robotics and Automation Letters, 2020
The letter presents a trailer-maneuverability analysis for the N-trailer kinematic structures comprising a tractor and an arbitrary number of single-axle trailers equipped with steerable or fixed wheels. For an elliptically-shaped set of tractor's input-velocities, we derive a mobility-ellipse generated in a velocity space of the (last) trailer.
openaire   +1 more source

Stability Versus Maneuverability in Aquatic Locomotion [PDF]

Integrative and Comparative Biology, 2002
The dictionary definition of stability as "Firmly established, not easily to be changed" immediately indicates the conflict between stability and maneuverability in aquatic locomotion. The present paper addresses several issues resulting from these opposing requirements. Classical stability theory for bodies moving in fluids is based on developments in
openaire   +2 more sources

MOF‐Derived Cu‐TiO2/Alginate Micromotors for Buoyancy‐Regulated 3D Motion

Advanced Science, EarlyView.
In this work, cyanobacteria‐inspired sodium alginate (SA)/Cu‐TiO2/Fe3O4 hydrogel micromotors generate and encapsulate O2 microvesicles upon light irradiation, enabling buoyancy‐mediated Z‐axis upward migration and surface enrichment at the light‐exposed water‐air surface.
Wei Zou, Qing Wu, Jiawei Lin, Kunchen Li, Yulong Ying, Josep Puigmartí‐Luis, Salvador Pané, Sheng Wang   +7 more
wiley   +1 more source

Distance-keeping tracking algorithm of surface targets for USV based on bidirectional fitting filtering

Zhongguo Jianchuan Yanjiu
ObjectiveMaintaining consistent tracking of surface ships using unmanned surface vehicles (USVs) is particularly challenging due to the target's high maneuverability and complex motion trajectories.
Xiaoqian SHI, Jia XU, Houjing CHEN, Xing WANG, Weizheng HU, Lifei SONG   +5 more
doaj   +1 more source

Amphibious Movement of Microrobots Inspired by Water Spiders

Advanced Science, EarlyView.
Inspired by the water strider, a novel microrobot is designed to maintain amphibious mobility in complex environments. It retains the ability to traverse the air‐liquid interface and perform directional movement within sophisticated, multifaceted environments, including complex gastric wall structures, with precise controllability.
Xiao Hu, Run Ouyang, Zhuhao Shi, Wanqiong Tao, Zuchao Zhu, Peifeng Lin, Jianzhong Lin, Luca Brandt   +7 more
wiley   +1 more source

High-speed 3D obstacle avoidance method for large-scale AUVs under limited field of view and multiple constraints

Zhongguo Jianchuan Yanjiu
ObjectivesConsidering that existing research on autonomous underwater vehicle (AUV) obstacle avoidance mainly focuses on low-speed obstacle avoidance for small and medium-sized AUVs and overly simplifies the diverse constraints within and outside the ...
Xianghong LI, Lin YU, Jing SU, Lei QIAO
doaj   +1 more source

Arthropod‐Inspired Miniature Modular Vibration Direct‐Drive Robot With Untethered Locomotion

Advanced Science, EarlyView.
This work presents an arthropod‐inspired untethered miniature modular vibration direct‐drive robot. By utilizing standardized driving units and nested locking interfaces, on‐demand reconfiguration into quadruped, hexapod, octopod, and circular morphologies is achieved.
Shijing Zhang, Ziteng Liu, Youwei Liu, Dehong Wang, Yingxiang Liu   +4 more
wiley   +1 more source

EVALUATION OF PLANING CRAFT MANEUVERABILITY USING MATHEMATICAL MODELING [PDF]

, 2016
Ship transportation is increasing globally as is risk of collision especially in congested areas is a main concern. Numerical modeling method is major simulation method to predict ship maneuverability. Ship maneuvering in calm water is an important topic
Mohammad Saeed Seif, Hajizadeh, Sajad, Seif, Mohammad Saeed, Mehdigholi, Hamid, Hamid Mehdigholi, Sajad Hajizadeh   +5 more
core   +1 more source

Ship path-following control method based on MPC-IMFAC

Zhongguo Jianchuan Yanjiu
ObjectiveThis study aims to solve the problem of path-following control under environmental disturbances and model uncertainties, especially the effects of external wind and wave environments.
Shijie LI, Taixu LIU, Jialun LIU, Chengqi XU, Jiawei HE   +4 more
doaj   +1 more source

When the River Runs Low: Heterogeneous Impacts of Transportation Disruptions on Local Grain Basis

Agribusiness, EarlyView.
ABSTRACT A substantial share of U.S. soybean and corn exports from the Midwest moves by barge along the Mississippi River system to export terminals in the Louisiana Gulf. Transportation costs between Midwestern grain elevators and export terminals create a wedge between prices at these locations, and shocks to these costs are partially passed on to ...
Yuan Zhang, Andrew E. Anderson, Nicholas J. Pates, Eunchun Park   +3 more
wiley   +1 more source