Results 41 to 50 of about 290 (181)

Performance Analysis of an Electro-Hydrostatic Actuator

Journal of the Korean Society for Aeronautical & Space Sciences, 2007
The EHA(Electro-hydrostatic Actuator) reveals completely different characteristics from the conventional valve-controlled Electro-hydraulic actuators. In this paper, its mathematical model including nonlinear elements was derived to be verified by experiments.
openaire   +2 more sources

All‐in‐One Underwater Quality Evaluation Metamaterial With Mechanical Robustness, Sound Attenuation, and Diffuse Reflection

Advanced Science, EarlyView.
In this work, a bioinspired all‐in‐one underwater quality evaluation metamaterial, combining sound attenuation, diffuse reflection, and mechanical robustness, is proposed based on jumping spider locomotion and human skeletal biomechanics. Meanwhile, a CNN‑driven quality evaluation framework is established for theoretically dimension‐reduced ...
Hongze Li, Zhenyu Li, Jinshui Yang, Jianhao Wu, Yidan Chen, Linzhi Wu, Hong Hu, Penglin Gao, Yegao Qu   +8 more
wiley   +1 more source

Load-Sensing Pump Design to Reduce Heat Generation of Electro-Hydrostatic Actuator Systems

Energies, 2018
The electro-hydrostatic actuator (EHA) with variable pump displacement is considered to be a promising alternative to the currently popular EHA with fixed pump displacement in terms of heat reduction.
Qun Chao, Junhui Zhang, Bing Xu, Yaoxing Shang, Zongxia Jiao, Zhihui Li   +5 more
doaj   +1 more source

Design and Experiments of Electro-Hydrostatic Actuator for Wheel-Legged Robot with Fast Force Control Response

Machines, 2023
The wheel-legged robot combines the functions of wheeled vehicles and legged robots: high speed and high passability. However, the limited performance of existing joint actuators has always been the bottleneck in the actual applications of large wheel ...
Huipeng Zhao, Junjie Zhou, Sanxi Ma, Shanxiao Du, Hui Liu, Lijin Han   +5 more
doaj   +1 more source

Modeling and Characterization of a Self‐Sensing Soft Hydraulic Muscle

Advanced Intelligent Systems, EarlyView.
This article presents the self‐sensing soft hydraulic muscle (SSHM), a novel soft actuator capable of simultaneously sensing force and length without external sensors. A comprehensive model accurately predicts SSHM behavior, validated experimentally with minimal errors. Using propylene glycol enhances durability and reduces hysteresis.
Nhu An Phan, Phuong Linh Dao, Duc Tu Vu, The Doan Le, Sy Trung Ngo, Minh Tri Phan, T. Thang Vo‐Doan, Ke Wu, Mai Thanh Thai   +8 more
wiley   +1 more source

Simulation research on electro-hydrostatic landing-gear retracting and releasing system and braking system of UAV

Hangkong gongcheng jinzhan
The landing-gear retracting and releasing，and braking system of unmanned aerial vehicle（UAV）plays a crucial role in the process of takeoff，landing，and braking of UAVs.
ZHANG Haoji
doaj   +1 more source

Manipulating Ferroelectricity Without Electrical Bias: A Perspective

Advanced Physics Research, EarlyView.
Alternatives to electrical bias to control ferroelectric polarization are highly desired for the development of ferroelectric‐based applications. The polarizing role of chemically engineered surfaces, the impact of chemical substitution and mechanical pressure, and light‐induced effects on the final polarization state are highlighted in this short ...
Bixin Yan, Valentine Gillioz, Ipek Efe, Morgan Trassin   +3 more
wiley   +1 more source

Recent advances in boosting interfacial bubble dynamics with external fields

Droplet, EarlyView.
External physical fields, including acoustic, magnetic, thermal, mechanical, and optical stimuli, accelerate the entire bubble‐dynamics sequence of nucleation, growth, and detachment. Abstract The efficiency of industrial electrocatalytic reactions depends not only on generating gaseous products but also on their detachment from the catalyst surface ...
Wenlu Xie, Yanwei Zhang, Yi Liu, Yiming Wei, Jing‐Li Luo, Chenyu Xu   +5 more
wiley   +1 more source

Study of the Dynamic Properties of the Miniature Electro-Hydrostatic Actuator

Machines
The electro-hydrostatic actuator (EHA) is a new type of high-performance servo actuator that originated in the field of aerospace, and it is gradually becoming a common basic component for various types of large equipment.
Yiqiang An, Jiazhe Mao, Chengwei Tong, Xiaoyun Zhou, Jian Ruan, Sheng Li   +5 more
doaj   +1 more source

Force Tracking Impedance Control of Hydraulic Series Elastic Actuators Interacting with Unknown Environment

Mathematics, 2022
Force tracking control for hydraulic series elastic actuators (SEAs) is the demand in robots interacting with the surrounding world. However, the inherent nonlinearities and uncertainties of the hydraulic system, as well as the unknown environment, make ...
Yong Nie, Jiajia Liu, Gang Liu, Litong Lyu, Jie Li, Zheng Chen   +5 more
doaj   +1 more source