Results 61 to 70 of about 805 (183)

From Flybys to Sample Return: A Review of Space Probes and Robotic Sampling Technologies for Small Bodies

Journal of Field Robotics, EarlyView.
ABSTRACT As a crucial puzzle piece of deep space exploration, exploring small bodies can provide significant scientific insights and valuable mineral resources. Unlike missions to the Moon and Mars, small‐body missions pose distinct technical challenges, including communication delays, weak gravity, and uncertain environments. This paper reviews a full
Xin Zhang, Hao Zhou, Dalin Zhou, Zhaojie Ju   +3 more
wiley   +1 more source

Energy-based Hamiltonian approach in H∞ controller design for n-degree of freedom mechanical systems

Systems Science & Control Engineering, 2019
This paper studies the energy-based approach for ${H_\infty } $ controller design of $n $-degree of freedom mechanical systems. In this approach, the Hamiltonian function, which is the sum of kinetic and potential energies of the system, is considered as
M. Karimi, T. Binazadeh
doaj   +1 more source

Quantifying Species‐ and Community‐Level Predation by Carabids on Pests and Beneficials in Wheat and Beet Fields

Entomologia Experimentalis et Applicata, Volume 174, Issue 8, Page 812-821, August 2026.
Using a model that translates qualitative prey detection data (presence/absence in predator gut contents) into quantitative predation rates, we estimate species‐specific diets of nine carabid species across three cropping contexts (wheat, sugar beet, and fodder beet) for five prey types.
Marion Rosec, Yann Tricault, Sylvain Poggi, Elsa Canard, Ambre Sacco Martret de Préville, Pierre Gendron, Lena Barascou, Marianne Doehler, Ségolène Buzy, Aurore Arnoult, Anne Le Ralec, Manuel Plantegenest, Abel Masson   +12 more
wiley   +1 more source

Neural network quaternion-based controller for port-Hamiltonian system

Demonstratio Mathematica
In this research article, a control approach for port-Hamiltonian PH systems based in a neural network (NN) quaternion-based control strategy is presented. First, the dynamics is converted by the implementation of a Poisson bracket in order to facilitate
Alsaadi Fawaz E., Serrano Fernando E., Batrancea Larissa M.   +2 more
doaj   +1 more source

On the Extension of Mesh‐Distortion‐Insensitive Petrov‐Galerkin Finite Element Formulations to Linear Elastodynamics

International Journal for Numerical Methods in Engineering, Volume 127, Issue 14, 30 July 2026.
ABSTRACT Numerous mesh‐distortion‐insensitive Petrov‐Galerkin finite element formulations have been developed for the simulation of elastostatic problems. This contribution presents initial results on how these formulations can be extended to linear elastodynamics. In this context, three different approaches are examined, building upon an established 8‐
Felix Zähringer, Peter Betsch
wiley   +1 more source

Power oscillation suppression strategy of VSG based on finite‐time Hamiltonian method

IET Power Electronics
In order to improve the stability of the virtual synchronous generator (VSG) system and suppress the power oscillation, a power oscillation suppression strategy of VSG based on the finite‐time Hamiltonian method is proposed in this paper.
Guo Xiaomei, Yonggang Li, Yichen Zhou
doaj   +1 more source

Robust Simultaneous Stabilization Control Method for Two Port-Controlled Hamiltonian Systems: Controller Parameterization

Abstract and Applied Analysis, 2014
This paper investigates robust simultaneous stabilization (RSS) control method for two port-controlled Hamiltonian (PCH) systems and proposes results on the design of simultaneous stabilization controller with parameters for such systems.
Zhong Cao, Xiaorong Hou
doaj   +1 more source

Smooth-Switching Control of Robot-Based Permanent-Magnet Synchronous Motors via Port-Controlled Hamiltonian and Feedback Linearization

Energies, 2020
To solve the contradiction between dynamic performance and steady-state performance of the robot system, a smooth-switching control strategy is proposed.
Anxing Liu, Haisheng Yu
doaj   +1 more source

Optical Phased Arrays on Photonic Integrated Circuit Platforms: Challenges, Opportunities, and Future Applications

Nanophotonics, Volume 15, Issue 14, 27 July 2026.
Integrated optical phased arrays are emerging as scalable engines for solid‐state beam steering and programmable wavefront control. This Review maps the field from beam‐steering principles and core building blocks to material platforms, system‐level bottlenecks, and application frontiers, highlighting how heterogeneous integration, aperiodic ...
Jingwei Li, Yuyuan Han, Aoxiang Chen, Pengpeng Li, Xinglin Zhu, Guanbao Zhao, Luohan Peng, Huaibin Zheng   +7 more
wiley   +1 more source

Self-organization in pedestrian dynamics: a stochastic port-Hamiltonian approach

Acta Polytechnica CTU Proceedings
Understanding pedestrian crowds as complex systems reveals how simple individual interactions yield rich collective behaviors. In this study, we adopt an energy-based modeling framework – port-Hamiltonian (pH) systems – to analyze a minimalist variant ...
Rafay Nawaid Alvi, Jean Daniel Mukam, Barbara Rüdiger, Antoine Tordeux   +3 more
doaj   +1 more source