Results 51 to 60 of about 539,294 (205)

Motion paths finding for multi-degree-of-freedom mechanisms

open access: yesInternational Journal of Mechanical Sciences, 2020
Multiple degree-of-freedom (DOF) mechanisms can provide more flexible reconfigurations than 1 DOF ones but are more complex to analyze. One difficulty is the existence of an unlimited number of valid motion directions at each configuration point. In this
Yang Li
semanticscholar   +1 more source

Successive Convexification for Real-Time Six-Degree-of-Freedom Powered Descent Guidance with State-Triggered Constraints

open access: yesJournal of Guidance Control and Dynamics, 2018
In this paper, we present a real-time successive convexification algorithm for a generalized free-final-time 6-degree-of-freedom powered descent guidance problem.
Michael Szmuk   +2 more
semanticscholar   +1 more source

Performance Improvement of Three-Phase Boost Power Factor Correction Rectifier Through Combined Parameters Optimization of Proportional-Integral and Repetitive Controller

open access: yesIEEE Access, 2021
This paper performs parameter optimization of proportional-integral (PI) and repetitive controller (RC) with a new objective function by adding two degrees of freedom for a three-phase boost power factor correction (PFC) rectifier.
Muhammad Saqib Ali   +4 more
doaj   +1 more source

Development of a new tuned vibration absorber based on one degree-of-freedom of translational motion

open access: yesCogent Engineering, 2021
The study has proposed a newly tuned vibration absorber (TVA) based on one degree-of-freedom (1DOF) of translational motion. The absorber mass takes the shape of a tank filled with fluid.
Abobakr Almashhor, Saeed A. Asiri
doaj   +1 more source

Role of the orbital degree of freedom in iron-based superconductors [PDF]

open access: yes, 2017
Almost a decade has passed since the serendipitous discovery of the iron-based high temperature superconductors (FeSCs) in 2008. The fact that, as in the copper oxide high temperature superconductors, long-range antiferromagnetism in the FeSCs arises in ...
M. Yi, Yan Zhang, Zhi-xun Shen, D. Lu
semanticscholar   +1 more source

Nanotweezers for Manipulating Untethered Micro/Nanoscale Bio‐Tools: Principles, Performance, and Highlighted Applications

open access: yesAdvanced NanoBiomed Research
The rapid advancement of nanotweezers for wireless manipulation of artificial micro‐ and nanoparticles has unlocked unprecedented possibilities in biomedicine.
Kelly Shih   +4 more
doaj   +1 more source

On Power-Absorption Degrees of Freedom for Point Absorber Wave Energy Converters

open access: yesJournal of Marine Science and Engineering, 2020
Point absorbers are extensively employed in wave energy conversion. In this work, we studied the point absorber with the buoy of a vertical cylindrical shape.
Jinming Wu
doaj   +1 more source

METAMORPHIC DESIGN AND DEGREE OF FREEDOM ANALYSIS ABOUT PARALLEL MECHANISM FOR ANKLE REHABILITATION

open access: yesJixie qiangdu, 2021
In order to achieve the movement demands of sprained ankle patients in different rehabilitation stages,this paper proposes a kind of metamorphic parallel mechanism for ankle rehabilitation,which can obtain the switch of 3 SPS/PS motion and 3 SPS/S motion
CHEN GengBiao, YI KuanHan
doaj  

Review on Multi-Degree-of-Freedom Piezoelectric Motion Stage

open access: yesIEEE Access, 2018
Multi-degree-of-freedom (multi-DOF) piezoelectric motion stage is an important part of modern manufacturing industry. In order to perform high precision outputs in a large travel range, various multi-DOF piezoelectric motion stages have been proposed and
Yingxiang Liu, Jie Deng, Qi Su
doaj   +1 more source

Solar Photovoltaic Tracking Systems for Electricity Generation: A Review

open access: yesEnergies, 2020
This paper presents a thorough review of state-of-the-art research and literature in the field of photovoltaic tracking systems for the production of electrical energy.
Sebastijan Seme   +3 more
doaj   +1 more source

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