Results 41 to 50 of about 46,005 (212)

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
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Dimensional Synthesis for Multi-Linkage Robots Based on a Niched Pareto Genetic Algorithm

Algorithms, 2020
The dimensional synthesis of multi-linkage robots has great significance for improving flexibility and efficiency. With the increase of the degree of freedom and restrictions on special occasions, the solution of dimensional synthesis becomes complicated
Hu Wu, Xinning Li, Xianhai Yang
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Determination of spherical curve defining the angle of service of android robot arm by method of small motions synthesis [PDF]

Омский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2018
A generalized method for determining the angle of service based on the synthesis of motions in the specified directions of the gripper’s axis with immobile center is presented.
F. N. Pritykin, V. I. Nebritov
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Numerical Simulation of the Maneuvering Motion Wake of an Underwater Vehicle in Stratified Fluid

Journal of Marine Science and Engineering, 2022
When a vehicle moves underwater, disturbance is generated and a wake remains that destroys the original free surface and produces a new wake. In order to study the mechanism and characteristics of the wave-making wake generated by the maneuvering motion ...
Chang Shi, Xide Cheng, Zuyuan Liu, Kunyu Han, Penghui Liu, Long Jiang   +5 more
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Snake robot uncovers secrets to sidewinders’ maneuverability [PDF]

Proceedings of the National Academy of Sciences, 2015
A hallmark of animal life is the ability to move through the environment to catch prey, avoid predators, or find mates. Animals achieve this using a staggering diversity of locomotor strategies despite having similar body shape and being subjected to similar physics—e.g., gazelles pronk and cheetahs gallop.
Sarah A, Stamper, Shahin, Sefati, Noah J, Cowan   +2 more
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Analysis on effect of shaft strut hydrofoil on anti-cavitation performance for surface ship

Zhongguo Jianchuan Yanjiu, 2019
[Objectives] In order to improve the anti-cavitation performance of shaft strut on a surface ship,[Methods] we study the front strut, compare the pressure distribution and anti-cavitation performance of the improved hydrofoil with those of the original ...
ZHANG Kai, YE Jinming, WANG Youqian, YU Anbin   +3 more
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Pectoral Fin-Assisted Braking and Agile Turning: A Biomimetic Approach to Improve Underwater Robot Maneuverability

Journal of Marine Science and Engineering
The integration of biomimetic pectoral fins into robotic fish presents a promising approach to enhancing maneuverability, stability, and braking efficiency in underwater robotics. This study investigates a 1-DOF (degree of freedom) pectoral fin mechanism
Qu He, Yunpeng Zhu, Weikun Li, Weicheng Cui, Dixia Fan   +4 more
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Chemotactic Maneuverability of Sperm

, 2011
In this fluid mechanics video, we explore the kinematics of chemotaxing sperm cells (sea urchin, \textit{Arbacia punctulata}) swimming in a chemoattractant gradient. We demonstrate that the complex swimming trajectories resulting in chemotactic behavior (`turn-and-run' motility) are comprised of several distinct flagellar maneuvers.
Guasto, Jeffrey S., Riffell, Jeffrey A., Zimmer, Richard K., Stocker, Roman   +3 more
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Tracking Highly Maneuverable Targets With Unknown Behavior [PDF]

Proceedings of the IEEE, 2004
Tracking of highly maneuvering targets with unknown behavior is a difficult problem in sequential state estimation. The performance of predictive-model-based Bayesian state estimators deteriorates quickly when their models are no longer accurate or their process noise is large.
Schell, C, Linder, S P, Zeidler, J R
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Hydrodynamic coefficients identification of ship simplified modular model based on support vector regression

Zhongguo Jianchuan Yanjiu
ObjectivesTo address the issue of multicollinearity and parameter drift in the identification of hydrodynamic coefficients in ship separated-type models, this paper proposes a method for modeling simplified three-degree-of-freedom modular models based on
Lifei SONG, Yuqing WANG, Wei PENG, Peiyong LI, Yushan LIu, Yongfeng ZHANG   +5 more
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