Results 61 to 70 of about 656 (167)

A Novel Swashplate Actuator Design for Unmanned Helicopter

DEStech Transactions on Computer Science and Engineering, 2019
Advantages of the Unmanned Helicopter are simple structure, powerful flight capability, great flexibility, resulting in promising prospects and wide applications in both military and civilian fields all over the world. Whether an Unmanned Helicopter is of one single rotor or multiple rotors, the swashplate performance plays a key role in the rotor ...
Tao YANG, Dong LIANG, Zhao-fu TIAN
openaire   +2 more sources

Electric machine sizing consideration for ePumps in mobile hydraulics

Energy Science &Engineering, Volume 12, Issue 3, Page 793-809, March 2024.
This research examines the energy efficiency and design of various ePump architectures for off‐road vehicles, with a special focus on those integrating permanent magnet synchronous machines and axial piston machines. The study reveals that variable displacement ePumps can cut electrical machine size by up to 40% under certain conditions, while the ...
Hassan Assaf, Shanmukh Sarode, Andrea Vacca, Scott D. Sudhoff   +3 more
wiley   +1 more source

Bi-spectrum counter map of piston shoes and swashplate wearing.

, 2016
Bi-spectrum counter map of piston shoes and swashplate wearing.
Yang Wang (5921), Yujie Cheng (3202656), Chen Lu (135200), Minvydas Ragulskis (3202653)   +3 more
core   +1 more source

The proof of concept of uninterrupted push‐pull electromagnetic propulsion and energy conversion systems for drones and planet landers

Engineering Reports, Volume 6, Issue 1, January 2024.
We present a proof of concept to demonstrate the capability of a newly invented variable speed push‐pull electromagnetic propulsion system for uninterruptedly generating the reciprocating motion of a magnetic‐piston by a solar battery‐driven polarity changer timing circuit together with a laser‐based timing circuit for redundancy.
Sanal Kumar VR, Amrith Mariappan, U. K. Thianesh, Ajith Sukumaran, Ashish Kumar, V. K. Vijil Lal, Jerin John, Raunak Sharma, Sanjay Singh   +8 more
wiley   +1 more source

A Novel Heli-Twin-Rotor Unmanned Aerial Vehicle: Design, Realization and Flying

Guidance, Navigation and Control
This paper presents a novel twin-rotor Unmanned Aerial Vehicle (UAV). By replacing the conventional single swashplate with two independent tilting mechanisms, it simplifies the mechanical structure and achieves control decoupling, while also mitigating ...
Zhi Chen, Jiajun Fu, Jingqi Ma, Jing Sun, Siyuan Wu, Xindong Fu   +5 more
doaj   +1 more source

Scaling Criteria for Axial Piston Machines Based on Thermo-Elastohydrodynamic Effects in the Tribological Interfaces

Energies, 2018
In lieu of reliable scaling rules, hydraulic pump and motor manufacturers pay a high monetary and temporal price for attempting to expand their production lines by scaling their existing units to other sizes.
Lizhi Shang, Monika Ivantysynova
doaj   +1 more source

Performance of the Use of Plastics in Oil-Free Scroll Compressors [PDF]

, 2012
Manufacturing cost of high precision scroll compressor parts remains a dominating factor in determining the overall production cost. Traditionally, scroll compressors are made of metallic parts which require high tolerances to avoid leakage. Precision is
Groll, Eckhard A., Shaffer, Bryce R.
core   +1 more source

Research on the Starting Acceleration Characteristics of a New Mechanical–Electric–Hydraulic Power Coupling Electric Vehicle

Energies, 2020
To simplify the layout of a purely electric vehicle transmission system and improve the acceleration performance of the vehicle, this paper utilizes the characteristics of the large torque of a hydraulic transmission system and proposes a new mechanical ...
Jian Yang, Tiezhu Zhang, Hongxin Zhang, Jichao Hong, Zewen Meng   +4 more
doaj   +1 more source

Numerical Simulation of a Slipper Model with Multi-Lands and Grooves for Hydraulic Piston Pumps and Motors in Mixed Lubrication

Lubricants, 2019
A theoretical model of a slipper with multi-lands and multi-grooves for swashplate type axial piston pumps and motors was established, including surface interactions.
Toshiharu Kazama
doaj   +1 more source

Feature Extraction of Impulse Faults for Vibration Signals Based on Sparse Non-Negative Tensor Factorization

Applied Sciences, 2019
The incipient damages of mechanical equipment excite weak impulse vibration, which is hidden, almost unobservable, in the collected signal, making fault detection and failure prevention at the inchoate stage rather challenging.
Lin Liang, Haobin Wen, Fei Liu, Guang Li, Maolin Li   +4 more
doaj   +1 more source