International Journal of Fluid Power最新文献_第9页

An Electrohydraulic Pressure Compensation Control System for an Automotive Vane Pump Application 用于汽车叶片泵的电液压力补偿控制系统

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International Journal of Fluid Power Pub Date : 2020-03-23 DOI: 10.13052/ijfp1439-9776.2034

Ryan Jenkins, M. Ivantysynova

引用次数: 0

Using a Neural Network to Minimize Pressure Spikes for Binary-coded Digital Flow Control Units 使用神经网络最小化二进制编码数字流量控制单元的压力峰值

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International Journal of Fluid Power Pub Date : 2020-03-16 DOI: 10.13052/ijfp1439-9776.2033

Essam Elsaed, M. Abdelaziz, N. Mahmoud

引用次数: 2

Data-driven Adaptive Thresholding Model for Real-time Valve Delay Estimation in Digital Pump/Motors 数字泵/电机实时阀延迟估计的数据驱动自适应阈值模型

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International Journal of Fluid Power Pub Date : 2020-03-09 DOI: 10.13052/ijfp1439-9776.2031

Abdallah A. Chehade, Farid Breidi, Keith Pate, J. Lumkes

{"title":"Data-driven Adaptive Thresholding Model for Real-time Valve Delay Estimation in Digital Pump/Motors","authors":"Abdallah A. Chehade, Farid Breidi, Keith Pate, J. Lumkes","doi":"10.13052/ijfp1439-9776.2031","DOIUrl":"https://doi.org/10.13052/ijfp1439-9776.2031","url":null,"abstract":"Valve characteristics are an essential part of digital hydraulics. The on/off solenoid valves utilized on many of these systems can significantly affect the performance. Various factors can affect the speed of the valves causing them to experience various delays, which impact the overall performance of hydraulic systems. This work presents the development of an adaptive statistical based thresholding real-time valve delay model for digital Pump/Motors. The proposed method actively measures the valve delays in real-time and adapts the threshold of the system with the goal of improving the overall efficiency and performance of the system. This work builds on previous work by evaluating an alternative method used to detect valve delays in real-time. The method used here is a shift detection method for the pressure signals that utilizes domain knowledge and the system’s historical statistical behavior. This allows the model to be used over a large range of operating conditions, since the model can learn patterns and adapt to various operating conditions using domain knowledge and statistical behavior. A hydraulic circuit was built to measure the delay time experienced from the time the signal is sent to the valve to the time that the valve opens. Experiments were conducted on a three piston in-line digital pump/motor with 2 valves per cylinder, at low and high pressure ports, for a total of six valves. Two high frequency pressure transducers were used in this circuit to measure and analyze the differential pressure on the low and high pressure side of the on/off valves, as well as three in-cylinder pressure transducers. Data over 60 cycles was acquired to analyze the model against real time valve delays. The results show that the algorithm was successful in adapting the threshold for real time valve delays and accurately measuring the valve delays.","PeriodicalId":13977,"journal":{"name":"International Journal of Fluid Power","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45763302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Control and Performance Analysis of a Digital Direct Hydraulic Cylinder Drive 数字直接液压缸传动的控制与性能分析

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International Journal of Fluid Power Pub Date : 2020-03-09 DOI: 10.13052/ijfp1439-9776.2032

N. Pedersen, P. Johansen, Lasse Schmidt, R. Scheidl, T. Andersen

{"title":"Control and Performance Analysis of a Digital Direct Hydraulic Cylinder Drive","authors":"N. Pedersen, P. Johansen, Lasse Schmidt, R. Scheidl, T. Andersen","doi":"10.13052/ijfp1439-9776.2032","DOIUrl":"https://doi.org/10.13052/ijfp1439-9776.2032","url":null,"abstract":"This paper concerns control of a digital direct hydraulic cylinder drive (D-DHCD) and is a novel concept with the potential to become the future solution for energy efficient hydraulic drives. The concept relies on direct control of a differential cylinder by a single hydraulic pump/motor unit connected to each cylinder inlet/outlet. The pump/motor unit in this research uses the digital displacement technology and comprises of numerous individually digital controlled pressure chambers, such that the ratio of active (motoring, pumping or idling) chambers determines the machine power throughput. This feature reduces energy losses to a minimum, since the inactive (idling) chambers has very low losses. A single DDM may provide individually load control for several cylinders without excessive throttling due to various load sizes. Successful implementation of the concept relies on proper control of the DDM, which demands a dynamical model that allows for system analysis and controller synthesis. This is a challenging task, due to the highly non-smooth machine behavior, comprising both non-linear continuous and discrete elements. This paper presents the first feedback control strategy for a D-DHCD concept, based on a discrete dynamical approximation and investigates the control performance in a mathematical simulation model representing the physical system.","PeriodicalId":13977,"journal":{"name":"International Journal of Fluid Power","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2020-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45437421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Transmitted Power of Piping and Wiring in Hydraulic, Pneumatic, and Electric Drive Systems 液压、气动和电力驱动系统中管道和线路的传输功率

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International Journal of Fluid Power Pub Date : 2020-01-01 DOI: 10.5739/jfpsij.13.9

T. Kazama

引用次数: 1

Evaluation of Tracking Control for Hydraulic Direct-drive System 液压直接驱动系统跟踪控制的评价

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International Journal of Fluid Power Pub Date : 2020-01-01 DOI: 10.5739/jfpsij.13.17

J. Shimizu, T. Otani, K. Hashimoto, A. Takanishi

引用次数: 0

Development and Attitude Control of Washable Portable Rehabilitation Device for Wrist without Position Sensor 无位置传感器可洗便携式腕部康复装置的研制与姿态控制

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International Journal of Fluid Power Pub Date : 2020-01-01 DOI: 10.5739/jfpsij.13.25

S. Shimooka, Yusuke Hane, T. Akagi, S. Dohta, W. Kobayashi, T. Shinohara, Y. Matsui

引用次数: 5

Slipper Surface Geometry Optimization of the Slipper/Swashplate Interface of Swashplate-Type Axial Piston Machines 斜盘式轴向活塞机滑靴/斜盘界面滑靴表面几何优化

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International Journal of Fluid Power Pub Date : 2019-11-25 DOI: 10.13052/ijfp1439-9776.2025

Ashkan A. Darbani, L. Shang, Jeremy Beale, M. Ivantysynova

{"title":"Slipper Surface Geometry Optimization of the Slipper/Swashplate Interface of Swashplate-Type Axial Piston Machines","authors":"Ashkan A. Darbani, L. Shang, Jeremy Beale, M. Ivantysynova","doi":"10.13052/ijfp1439-9776.2025","DOIUrl":"https://doi.org/10.13052/ijfp1439-9776.2025","url":null,"abstract":"The slipper/swashplate interface, as one of the three main lubricating interfaces in swashplate type axial piston machine, serves both a sealing function and a bearing function while dissipating energy into heat due to viscous friction. The sealing function prevents the fluid in the displacement chamber from leaking out through the gap to the case, and the bearing function prevents the slipper from contacting to the swashplate. The challenge of the conventional slipper/swashplate lubricating interface design is to rely on the tribological pairing self-adaptive wearing process to find a slipper surface profile that fulfills the bearing function. However, the resulted slipper surface profile from uncontrollable wearing process is not necessarily able to achieve good energy efficiency. This article proposes a novel slipper design approach that overcomes this challenge by adding a quadratic spline curvature to the slipper running surface which eliminates the wear while keeping good efficiency. A fully-coupled fluid-structure and thermal interaction model is used to simulate the performance of the slipper/swashplate interface. A computationally inexpensive optimization scheme is used to find the desired slipper design. This article presents the simulation methodology, the optimization scheme, the full factorial simulation study results, and the optimized slipper running surface.","PeriodicalId":13977,"journal":{"name":"International Journal of Fluid Power","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2019-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48916546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Design and Characterization of a Five-Chamber Constant-Volume Hydraulic Actuator 五腔定容液压执行器的设计与特性

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International Journal of Fluid Power Pub Date : 2019-11-20 DOI: 10.13052/ijfp1439-9776.2024

Beau Johnson, H. Bartlett, M. Goldfarb

引用次数: 2

Analysis of Self-oscillating Single-acting Hydro-impact System Operational Modes with Two Limiters of Striker Movement 具有两个撞锤运动限制器的自激式单动液压冲击系统运行模式分析

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International Journal of Fluid Power Pub Date : 2019-11-20 DOI: 10.13052/ijfp1439-9776.2023

L. Gorodilov

{"title":"Analysis of Self-oscillating Single-acting Hydro-impact System Operational Modes with Two Limiters of Striker Movement","authors":"L. Gorodilov","doi":"10.13052/ijfp1439-9776.2023","DOIUrl":"https://doi.org/10.13052/ijfp1439-9776.2023","url":null,"abstract":"A new property of self-oscillating single-acting hydro-impact systems is considered in this paper – an ability to make strikes in forward and backward directions in presence of two limiters of striker movement without structural changes in device. Mathematical models are presented for system, which includes a flow rate source, a control valve, an impact unit (body frame, striker and spring), an energy accumulator and two limiters. Program for system operational modes (op-modes) simulation is developed and dynamics of specific typical device is numerically investigated. Theoretical oscillograms of its dynamic characteristics and dependencies of integral characteristics on source and impact device parameters are analyzed. At low flow rate multiimpact self-oscillating cycles are obtained, in which the nature of dynamics phenomenon repeats after several striker-limiters interactions. Increase of flow rate leads to single-impact working mode with forward direction of striker movement, then to transition to double-impact mode with forward and backward directions and, further, to single-impact mode with backward direction. Transition boundary points, in which system op-modes changes, are found. Results of this paper can be applied in development of reversible hydro-impact devices (with impacts in forward and backward directions) for mining and construction engineering.","PeriodicalId":13977,"journal":{"name":"International Journal of Fluid Power","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2019-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45053275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5