International Journal of Fluid Power最新文献_第6页

Automatic Fault Diagnosis Method for Hydrodynamic Control System 水动力控制系统故障的自动诊断方法

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International Journal of Fluid Power Pub Date : 2021-07-19 DOI: 10.13052/IJFP1439-9776.2233

Jin Zheng

引用次数: 3

Fluid Stiction From a Contact Condition 接触条件下的流体刺激

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International Journal of Fluid Power Pub Date : 2021-07-10 DOI: 10.13052/IJFP1439-9776.2232

Remzija Ćerimagić, P. Johansen, T. Andersen, R. Scheidl

引用次数: 0

Analysis on the Steady-state Performance and Losses of a Bent-axis Type Hydraulic Motor Used in Heavy Earth Moving Machinery 重型土方机械用弯轴式液压马达稳态性能及损耗分析

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International Journal of Fluid Power Pub Date : 2021-07-10 DOI: 10.13052/IJFP1439-9776.2231

A. K. Pandey, Ajay Kumar, Nitish Kumar

{"title":"Analysis on the Steady-state Performance and Losses of a Bent-axis Type Hydraulic Motor Used in Heavy Earth Moving Machinery","authors":"A. K. Pandey, Ajay Kumar, Nitish Kumar","doi":"10.13052/IJFP1439-9776.2231","DOIUrl":"https://doi.org/10.13052/IJFP1439-9776.2231","url":null,"abstract":"Hydraulic components play a significant role in the mining and construction equipment. It is responsible for smooth change in the output speed, torque, and power of the machine. The hydrostatic drive powered by a constant speed electric motor is widely used in the propel system of the mining equipment. Regulation of the displacements of the pump and the hydro-motor of the drive facilitates the control of the straight running and steering of the machines. \u0000In the present scenario, better efficiency and ease of control are the critical aspects to be considered in the design and selection of the hydraulic pump and motor used in underground mining operations. The bent axis hydro-motor is one such equipment that is an electro-hydraulic component that can work in an adverse working environment. \u0000The present study deals with the performance analysis of fixed displacement bent axis hydro-motor at different operating parameters such as different temperatures, sizes, viscosity at different loads, and drive speed. For analysis, the hydraulic drive consists of a variable displacement pump rotated by a constant speed electric motor and a fixed displacement hydro-motor. The regulation of the pump displacement controls the speed of the drive. Manually controlled hydrostatic drive propels the said machine against variable load demands. The present work investigates the performances of the hydro-motor used in the mining and construction machine through detailed modeling and experimentations. The steady-state performances are analyzed in terms of slip, torque losses and efficiency of the hydro-motor. The study finds the design guideline to operate the hydrostatic drive using such motors in a reasonable efficiency zone. \u0000The model is validated for various operating conditions of the equipment by comparing the predicted results with the test results. The outcome of the present work will be expedient for the preliminary design and assortment of similar hydraulic component used in the mobile, mining equipment.","PeriodicalId":13977,"journal":{"name":"International Journal of Fluid Power","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46634191","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: 0

Strategies for Implementing the Jakobsson-Floberg-Olsson Cavitation Model in EHL Simulations of Translational Seals 在平动密封EHL模拟中实现Jakobsson-Floberg-Olsson空化模型的策略

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International Journal of Fluid Power Pub Date : 2021-05-31 DOI: 10.13052/IJFP1439-9776.2223

Niklas Bauer, Andris Rambaks, Corinna Müller, H. Murrenhoff, K. Schmitz

引用次数: 2

Study on the Articulated Finger Based on Pneumatic Soft Joint 基于气动软关节的关节指研究

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International Journal of Fluid Power Pub Date : 2021-05-31 DOI: 10.13052/IJFP1439-9776.2226

Kai Shi, Huayi Zheng, Jun Li, Gang Bao

引用次数: 1

An Adaptive Robust Controller for Hydraulic Robotic Manipulators with a Flow-Mapping Compensator 带流量映射补偿器的液压机器人自适应鲁棒控制器

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International Journal of Fluid Power Pub Date : 2021-05-31 DOI: 10.13052/IJFP1439-9776.2225

Fu Zhang, Jun-hui Zhang, Bing Xu, Huaizhi Zong

{"title":"An Adaptive Robust Controller for Hydraulic Robotic Manipulators with a Flow-Mapping Compensator","authors":"Fu Zhang, Jun-hui Zhang, Bing Xu, Huaizhi Zong","doi":"10.13052/IJFP1439-9776.2225","DOIUrl":"https://doi.org/10.13052/IJFP1439-9776.2225","url":null,"abstract":"Proportional directional control valves have flexible control functions for the control of various hydraulic manipulators. It is foreseeable that the application of proportional directional control valves will be further expanded. However, due to its own structure, its important parameter, flow gain, is complex, and it has a complex functional relationship with valve opening and temperature. The variable flow gain reduces the performance of a strictly derived nonlinear controller. Therefore, it is necessary to consider the nonlinearity of flow gain in the controller design. In order to solve the above problems, this paper proposes an adaptive robust controller for a hydraulic manipulator with a flow-mapping compensator, which takes into account the nonlinear flow gain and improves the performance of the nonlinear controller. First, we established an adaptive robust controller of the hydraulic manipulator to obtain the load flow of the control input valve. Then, the function of flow gain, input voltage, and temperature are calibrated offline using cubic polynomial, and the flow-mapping compensator is obtained. Finally, we calculate the input voltage based on the flow-mapping compensator and load flow. The flow-mapping compensator further reduces the uncertainty of the model and improves the robustness of the system. By using the proposed controller, the control accuracy of the hydraulic manipulator is significantly improved.","PeriodicalId":13977,"journal":{"name":"International Journal of Fluid Power","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44282374","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: 0

Geometry of Ball Seat Valves 球阀的几何形状

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International Journal of Fluid Power Pub Date : 2021-05-31 DOI: 10.13052/IJFP1439-9776.2222

Felix Fischer, Niklas Bauer, H. Murrenhoff, K. Schmitz

引用次数: 0

A Cost-Effective Electro-Hydraulic Actuator Solution with Open Circuit Architecture 具有开路结构的经济高效的电液执行器解决方案

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International Journal of Fluid Power Pub Date : 2021-05-31 DOI: 10.13052/IJFP1439-9776.2224

Shaoyang Qu, David Fassbender, A. Vacca, Enrique Busquets

{"title":"A Cost-Effective Electro-Hydraulic Actuator Solution with Open Circuit Architecture","authors":"Shaoyang Qu, David Fassbender, A. Vacca, Enrique Busquets","doi":"10.13052/IJFP1439-9776.2224","DOIUrl":"https://doi.org/10.13052/IJFP1439-9776.2224","url":null,"abstract":"With the recent electrification trend in the fluid power area, more research has been incentivized to propose cost-effective and energy-efficient solutions for hydraulic systems. Hence, electro-hydraulic actuator (EHA) architectures receive increasing attention. The paper proposes a novel open-circuit EHA architecture, with the goal to obtain a cost-effective solution for mobile applications while maximizing the overall system efficiency. The proposed EHA is capable of meeting or exceeding traditional off-road machine performance, therefore enabling further electrification of off-road machines. Four-quadrant functionality, covering the full speed range, is achieved by a combination of a variable electro-hydraulic drive and valves with different functions. Focusing on the steady-state performance, the functionality is validated by numerical as well as experimental methods. A simulation model based on the Amesim environment and a dedicated test setup was developed to verify the performance. The good match between simulation and experimental results confirms the potential of the formulation approach of the proposed EHA for applications with different duty cycles and power levels.","PeriodicalId":13977,"journal":{"name":"International Journal of Fluid Power","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46663233","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: 6

Force-based Active Compliance Control of Hydraulic Quadruped Robot 液压四足机器人基于力的主动柔度控制

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International Journal of Fluid Power Pub Date : 2021-05-29 DOI: 10.13052/IJFP1439-9776.2221

Zhu Rui, Yang Qingjun, Chen Chen, Jiang Chunli, Li Congfei, Wan Yu-xuan

{"title":"Force-based Active Compliance Control of Hydraulic Quadruped Robot","authors":"Zhu Rui, Yang Qingjun, Chen Chen, Jiang Chunli, Li Congfei, Wan Yu-xuan","doi":"10.13052/IJFP1439-9776.2221","DOIUrl":"https://doi.org/10.13052/IJFP1439-9776.2221","url":null,"abstract":"The hydraulically driven quadruped robot has received extensive attention from many scholars due to its high power density and adaptability to unstructured terrain. However, the research on hydraulic quadruped robots based on torque control is not mature enough, especially in the aspect of multi-rigid body dynamics. In this paper, the most commonly used gait trot is selected as the research object. First, the multi-rigid motion equation of the quadruped robot is established by the spin recursion method based on Lie groups. Next, the Lagrange multiplier is used to represent the constraint force to establish the 12-degree-of-freedom inverse dynamics model of the quadruped robot’s stance phase. And the hybrid dynamics method is used to reduce the dimension of the inversion matrix, which simplifies the solution process of the dynamics model. Then, the trajectory of the foot is planned. Through the analysis of the simplified model, it is concluded that the gait cycle and the initial position of the stance phase are important factors affecting the stability of the trot gait. Finally, the controller framework of the quadruped robot is introduced, and the effectiveness of the algorithm designed in this paper is verified through the co-simulation of the trot gait. The co-simulation results show that the inverse dynamics algorithm can be used as the feedforward of the control system, which can greatly reduce the gains of the PD controller; the robot has good compliance and can achieve stable trotting.","PeriodicalId":13977,"journal":{"name":"International Journal of Fluid Power","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42406023","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

A Note on Leakage Jet Forces: Application in the Modelling of Digital Twins of Hydraulic Valves 泄漏射流力:在液压阀数字孪生模型中的应用

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International Journal of Fluid Power Pub Date : 2021-05-01 DOI: 10.13052/IJFP1439-9776.2214

Zoufiné Lauer-Baré, E. Gaertig, John L Krebs, C. Arndt, Christian Sleziona, André Gensel

{"title":"A Note on Leakage Jet Forces: Application in the Modelling of Digital Twins of Hydraulic Valves","authors":"Zoufiné Lauer-Baré, E. Gaertig, John L Krebs, C. Arndt, Christian Sleziona, André Gensel","doi":"10.13052/IJFP1439-9776.2214","DOIUrl":"https://doi.org/10.13052/IJFP1439-9776.2214","url":null,"abstract":"The proper modelling of fluid flow through annular gaps is of great interest in leakage calculations for many applications in fluid power technology. However, while detailed numerical simulations are certainly possible, they are very time consuming, in various cases prone to numerical instabilities and may not even include all physically relevant effects. This is an issue especially in system simulations, where a large set of computations is needed in order to prepare the lookup-tables for the required input fields. In this work, an analytical approximation for the shear force, which is induced by viscous flow between two eccentric cylinders, is presented. This relation, and its derivation, mimics and enhances the well-known Piercy-relation for the corresponding volume flow that is utilized in state-of-the-art system simulation tools. To determine its range of validity, the analytical relation for the shear force is compared to 3D-simulations. Additionally, an application of this approximation for creating digital twins of hydraulic valves is also discussed in this work.","PeriodicalId":13977,"journal":{"name":"International Journal of Fluid Power","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2021-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47627428","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