Results 61 to 70 of about 249,552 (211)

Adaptive Backstepping Control of a Pneumatic System With Unknown Model Parameters and Control Direction

IEEE Access, 2019
The performance of the pneumatic elements and the micro-controller steadily increases as the price of them decreases. This trend promotes high performance tracking control research on pneumatic servo systems. However, it is very difficult to obtain exact
Hai-Peng Ren, Xuan Wang, Jun-Tao Fan, Okyay Kaynak   +3 more
doaj   +1 more source

Numerical and Experimental Investigations of Cavitation Phenomena Inside the Pilot Stage of the Deflector Jet Servo-Valve

IEEE Access, 2020
Two-stage electrohydraulic servo-valves play an important role in the most modern hydraulic servo control systems for fight wing controls, manufacturing robots, and many engineering applications.
Bijan Krishna Saha, Jinghui Peng, Songjing Li   +2 more
doaj   +1 more source

A Performance Prediction Method for a High-Precision Servo Valve Supported by Digital Twin Assembly-Commissioning

Machines, 2021
The manufacturing of a high-precision servo valve belongs to multi-variety, small-batch, and customized production modes. In the process of assembly and commissioning, various characteristic parameters are critical indicators to measure product ...
Xuemin Sun, Shimin Liu, Jinsong Bao, Jie Li, Zengkun Liu   +4 more
doaj   +1 more source

Design and Characterization of a Dual‐Mode Soft Robotic Flapping Propeller With Pneumatic Stiffness Modulation

Advanced Intelligent Systems, EarlyView.
A novel soft robotic propeller overcomes traditional efficiency‐flexibility tradeoffs via a hybrid pneumatic‐cable actuation strategy. This architecture enables active stiffness modulation with dual‐mode locomotion: tunable biomimetic swimming and earthworm‐inspired wriggling for confined spaces.
Jiazi Geng, Hua Shao, Yiyang Li, Lin Liang, Jinfeng Yang, Xianhong He, Fengran Xie   +6 more
wiley   +1 more source

Non-linear finite element analyses of the aortic heart valve [PDF]

, 2004
Includes bibliographical references.Finite element models of the aortic heart valve have been successfully used in the past to gain insight into the mechanics of the valve and to aid in understanding of valve failure.
Koch, Thorsten M
core   +1 more source

Modelling, transient response and hydraulic behaviour of 2DOF stabilization platform [PDF]

FME Transactions, 2020
The main part of the hydraulic circuit of the hydraulic stabilization platform (HSP) is the electro-hydraulic servo valve (EHSV), which is very expensive due to its manufacturing requirements, so the proper selection for the geometrical configuration of ...
Ibrahim Ezz Eldin, Elnady Tarek, Hassan Mohamed Saffaa, Saleh Ibrahim   +3 more
doaj  

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

Effect of Servo Valve Dynamic on Precise Position Control of a Pneumatic Servo Table

International Journal of Automation Technology, 2008
In experimentally investigating the effect of servo valve dynamics on control of a pneumatic servo table with an air bearing, we propose control using a PDD2 and a feedforward controller, then test step and trajectory tracking response with natural servo valve frequencies.
Toshinori Fujita, Kenji Kawashima, Takashi Miyajima, Taro Ogiso, Toshiharu Kagawa   +4 more
openaire   +2 more sources

Investigation on the mechanical behavior of the multiple‐layered lining structure of a water conveyance tunnel with high internal water pressure

Deep Underground Science and Engineering, EarlyView.
This study presents large‐scale similarity model testing (geometric ratio 3.6) of an innovative multiple‐layered lining system—comprising exterior precast segments, middle self‐compacting concrete, and an interior steel pipe—for high‐pressure (0.75 MPa) water conveyance tunnels.
Ramin Asadi, Shimin Wang, Chang Liu, Zhiyu Lin, Chuan He   +4 more
wiley   +1 more source

Uma solução para economia de ar comprimido em sistemas de controle de posição pneumáticos [PDF]

, 2014
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia de Automação e Sistemas, Florianópolis, 2014.Este trabalho apresenta um estudo teórico e experimental de um esquema alternativo para a ...
Endler, Luciano
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