Results 41 to 50 of about 249,552 (211)
Design and simulation of hydraulic auto-brake-valve of unmanned aerial vehicle
The Journal of Engineering, 2020 This study designs one kind of hydraulic auto-brake-valve calculates its driving force and velocity, simulates its braking force and stability, in order to accomplish auto brake in the landing condition and keep braking in cruising condition of the ...
Gu Feng, Zhu Bo, Ju Hong Fu
doaj +1 more source
Control Performance Test of an Electrically-Controlled Variable Valve Timing System Using Servo Motors [PDF]
한국정밀공학회지, 2017 Recently, technologies related to green cars are gaining attention. A variable valve-timing system (VVT) is widely used in internal-combustion engines to improve fuel efficiency and engine performance by controlling the valve open-close timing.
Chung-Il Cho, Hyeong-Joon Ahn
doaj +1 more source
Automatic control valve using servo motor [PDF]
, 2013 This thesis is about developing a small scale control system to control the flow rate of water by using a servo control valve. Arduino board as the microcontroller was used to make a control plant much easier. The simplify C/C++ programming language also
Zul Fadli, Mohamad Tohid
core +2 more sources
Aircraft Anti-Skid Brake Control Based on High-Speed on-off Valve
MATEC Web of Conferences, 2015 Aircraft hydraulic brake system usually use pressure servo valve for anti-skid brake control. As pressure servo valve realizes the pressure closed loop by hydraulic feedback loop, this structure increased the complexity of the processing and ...
Li Wei, Zhang Hu, Huang Xiaoya
doaj +1 more source
International Journal of Aerospace Engineering, 2021 The deflector jet pressure servo valve is a kind of high-precision hydraulic component that can be widely used in the antiskid braking system of an aircraft. In actual service, it will be faced with extreme working conditions of gradual oil contamination,
Yuanbo Chu +3 more
doaj +1 more source
Advanced Robotics Research, EarlyView.This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska +2 more
wiley +1 more source
A parsimonious model for the proportional control valve [PDF]
, 2001 A generic non-linear dynamic model of a direct-acting electrohydraulic proportional solenoid valve is presented. The valve consists of two subsystems-s-a spool assembly and one or two unidirectional proportional solenoids.
Gentle, CR, Elmer, KF
core
High Precise Fuzzy Control for Piezoelectric Direct Drive Electro-Hydraulic Servo Valve
Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2012 As the core part of the electro-hydraulic servo system, the electro-hydraulic servo valve plays an important role in the system. Due to the piezoelectric actuator has characteristics of fast response, easy control and high control accuracy, it can be ...
Miaolei ZHOU +3 more
doaj +1 more source
Energies, 2021 In many heavy machines, the use of high force drives is required. For such tasks, electrohydraulic servo drives with proportional valves are used most often. In these valves, the proportional electromagnets are applied.
Andrzej Milecki, Jarosław Ortmann
doaj +1 more source
Advanced Robotics Research, EarlyView.This study presents a soft pneumatic fabric bidirectional actuation module (PNEUMA) capable of generating high torque in both bending directions within a single integrated architecture. PNEUMA achieves up to 50 Nm with reduced inflation volume and a lightweight design.
Odysseas Simatos +2 more
wiley +1 more source