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Showing 1 to 11 of 11 for “"Fluid power"”.
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Modeling and validation of a syntactic foam lining for noise control devices for fluid power systems
Excessive fluid-borne noise in hydraulic systems is a problem the fluid power industry has long struggled to address. Traditional noise control devices such as Helmholtz resonators, tuning coils, and Herschel-Quincke tubes are generally too large for fluid power systems unless the speed of sound in …
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Investigation of digital pump/motor control strategies
<p>A pump is the heart of fluid power systems, it has a significant impact on the efficiency of many fluid power systems. Motors are the most common rotary actuators in fluid power systems. State-of-the-art pump/motor units can achieve efficiencies higher than 90% when operating at maximum …
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Institutional Ethnography: How Tenured Academic Women Talk About Success
… and participant observation illuminated the fluid power dynamics of academic women in the gendered discursive organization of the academy. The women respondents described their attainment of tenure and rank, and how this influenced their social relations both within the university and …
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Friction characteristics of microtextured surfaces under hydrodynamic lubrication
… technique and engineering design rules for fluid power applications. We report experimental and numerical investigation of the friction characteristics of microtextured surfaces. The textures are of size 28-257 um on stainless steel surfaces, fabricated using micro-casting. Friction …
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Design, Modeling, and Analysis of Microscale Pneumatic Valve Architectures to Simplify Integration of Small Displacement Actuators
Fluid power is an essential technology that underpins modern societal and industrial infrastructure. The performance of the majority of fluid power systems hinges on proper control valve function. Despite the importance, the core actuator technology used in control valves has remained largely …
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Design and performance evaluation of a rotary flow control valve for independent metering hydraulics.
… cars. This is partly attributed to inefficient power hydraulic systems used to drive these machines’ tools or instruments. A relatively recent idea of an independent metering technology has become a major topics in improving efficiency, reducing fuel consumption and saving energy. Current …
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Limitations on tidal-in-stream power generation in a strait
… is extracted. With the goal of producing maximum power, there is an ideal amount of resistance these turbines should provide; too little resistance will not a develop a sufficient pressure differential, while too much resistance will choke the flow. Tidal flow in a strait is driven by the …
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Investigation of Noise Sources and Propagation in External Gear Pumps
… accepted as the best technology for transmitting power in many engineering applications due to its advantages in power density, control, layout flexibility, and efficiency. Due to these advantages, hydraulic systems are present in many different applications including construction, agriculture, …
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Advanced Control Strategies for Mobile Hydraulic Applications
… crane (case study 1) was instrumented at Maha Fluid Power Research Center to study the effectiveness of the proposed control method, its stability and its experimental validation. Up to 30% vibration damping and 40% energy savings were observed for a specific cycle over the standard vibration …
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Investigation of Novel Displacement-Controlled Hydraulic Architectures for Railway Construction and Maintenance Machines
… reduction of the baseline machine’s rated engine power without modifying the working hydraulics. Concerning the working hydraulics, the focus is to extend displacement-controlled technology to specific functions on railway construction and maintenance machines. Two specific examples of complete …
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Modeling and Experimental Validation of Disc and Reed Style Check Valves for Hydraulic Applications
… internal combustion engines, where the working fluid has low density, viscosity, and bulk modulus. However, in a hydraulic system, the fluid – namely oil – is dense, viscous, and stiff, contributing additional physical effects that must be considered. Furthermore, the operating pressure in …