Results 41 to 50 of about 2,879,970 (295)

Mechanism of Temperature’s Acting on Electro-Hydraulic Servo Valve

IEEE Access, 2019
To understand temperature's influence on the electro hydraulic servo valve, a theoretical model of describing the detailed mechanism is necessary. For a servo valve experiencing actual working conditions, the temperature variation acts on the performance
Hao Yan, Yang Liu, Li Ma
doaj   +1 more source

Hierachical micro/nano structures fabrication by a novel tri-axial piezoelectric servo system

Materials & Design, 2022
In this study, a novel tri-axial piezoelectric servo system is developed for micro/nano manufacturing considering the stroke, motion resolution, crosstalk, working bandwidth, compact structure, and position and pose modulation capability of cutting tool.
Haiqiang Yu, Jinguo Han, Shiyu Li, Dongpo Zhao, Jinhui Wang, Yebing Tian, Jieqiong Lin   +6 more
doaj   +1 more source

A Direction‐Aware Piezo‐Transmittance Strain Sensor via Engineered Alignment of Carbon Nanotubes (CNTs)

Advanced Materials Technologies, EarlyView.
A direction‐aware piezo‐transmittance strain sensor is realized through the engineered alignment of carbon nanotubes. This anisotropic architecture instantaneously modulates optical transmittance, achieving ultra‐high sensitivity and exceptionally low hysteresis. By effectively eliminating signal crosstalk to precisely decouple multidirectional strains,
Byeongmin Kang, Kwangjun Kim, Jimin Gu, Junseong Ahn, Yongrok Jeong, Ji‐Hwan Ha, Sohee Jeon, Soonhyoung Hwang, Byung‐Ho Kang, Jihyeon Ahn, Jong‐An Choi, Minwook Kim, Yeonguk Jung, Jun‐Ho Jeong, Jong G. Ok, Inkyu Park   +15 more
wiley   +1 more source

Perfil epidemiológico da população brasileira e o espaço das políticas públicas [PDF]

, 2014
O capítulo analisa o perfil epidemiológico da população brasileira à luz da teoria da transição epidemiológica, destacando as mudanças nos padrões de mortalidade e morbidade associadas à transição demográfica, ao desenvolvimento econômico e à urbanização.
Luciana Mendes Santos Servo
core  

Fractional-Order Modeling and Identification for Dual-Inertia Servo Inverter Systems with Lightweight Flexible Shaft or Coupling

Fractal and Fractional
To effectively mitigate resonance in dual-inertia servo inverter systems with a lightweight flexible shaft or coupling, the precise modeling of the dual-mass mechanism is essential.
Xiaohong Wang, Yijian Su, Ying Luo, Tiancai Liang, Hengrui Hu   +4 more
doaj   +1 more source

Analysis and experimental validation of a pressure control method using magneto-rheology fluid flows

The Journal of Engineering, 2018
In this study, a spool actuating mechanism using controlled pressure difference is proposed for a large hydraulic servo valve. The actuating mechanism is accomplished by tuning magneto-rheological (MR) fluid flow.
Fan Wang, Ning Guo, Linxiang Wang
doaj   +1 more source

Frequency Domain Design Method of the Aeroengine Fuel Servo Constant Pressure Difference Control System with High Performance

Aerospace, 2022
The constant pressure difference regulating mechanism is widely used in aeroengine fuel servo metering systems, and it almost decides the metering precision.
Wenshuai Zhao, Xi Wang, Yifu Long, Zhenhua Zhou, Linhang Tian   +4 more
doaj   +1 more source

Nature‐Derived Chitosan Biopolymer: A Promising Candidate for Sustainable Electronics

Advanced Materials Technologies, EarlyView.
In the creation of environmentally friendly devices, nature‐derived chitosan biopolymer is a promising contender for sustainable electronic research. It can be utilized to create more ecologically friendly scalable gadgets and has a variety of uses in different active layers of electronics.
Joshua McDonald, Ali Nawaz, Amandeep Singh, Prashant Sonar   +3 more
wiley   +1 more source

Research on thermodynamic modeling and temperature prediction of double flapper-nozzle servo valves

Case Studies in Thermal Engineering
The thermal characteristic design of the aerospace servo valve is of significant importance due to the high temperature operating conditions. This paper aims to study the law of temperature variation of the internal chambers and shell of the servo valve ...
Lei Li, Gen Wang, Libo Qiu, Cunkun Cai
doaj   +1 more source

Multiobjective Codesign Optimization of a Planar Pneumatic Artificial Muscle‐Based Snake‐Like Robot for Enhanced Agility and Energy Efficiency

Advanced Robotics Research, EarlyView.
A codesign multiobjective optimization framework was developed to enhance the morphology and controller of a snake‐like robot driven by artificial muscles. It improved planar locomotion, agility, and power efficiency. The approach optimized link geometry and controller gains, revealing that shorter muscles near joints and longer linkages maximize ...
Ayla Valles, Mahdi Haghshenas‐Jaryani
wiley   +1 more source