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Development of a novel two-stage proportional valve with a pilot digital flow distribution

Qiang GAO, Yuchuan ZHU, Changwen WU, Yulei JIANG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2,   Pages 420-434 doi: 10.1007/s11465-020-0622-2

Abstract: Pilot two-stage proportional valves are widely used in high-power hydraulic systems.the purpose of improving the dynamic performance, reliability, and digitization of the traditional proportionalvalve, a novel two-stage proportional valve with a pilot digital flow distribution is proposed from

Keywords： two-stage proportional valve     digital flow distribution     high-speed on/off valve     position tracking characteristic    

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Proportional directional valve based automatic steering system for tractors Project supported

Jin-yi LIU,Jing-quan TAN,En-rong MAO,Zheng-he SONG,Zhong-xiang ZHU

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 5,   Pages 458-464 doi: 10.1631/FITEE.1500172

Abstract: The system design is composed of a 5-way-3- position proportional directional valve, two pilot-controlledThe steering controller is based on proportional-integral-derivative (PID) running on a 51-microcontroller-unit

Keywords： Automatic steering system     Hydraulic circuit     Proportional directional valve     Proportional-integral-derivative    

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The coupling of sand with ZVI/oxidants achieved proportional and highly efficient removal of arsenic

Sana Ullah, Xuejun Guo, Xiaoyan Luo, Xiangyuan Zhang, Yameng Li, Ziyu Liang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1273-6

Abstract: . • Sand doping facilitated proportional As trapping along the ZVI/oxidants column. • ZVI/sand/oxidantsHowever, the uniform activation of ZVI throughout the column and the proportional removal of target contaminants

Keywords： Arsenic     ZVI     Sand     Oxidants     Fixed-bed Column     Removal    

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Impregnation of thermoplastic resin in jute fiber mat

LIU Xiaoye, DAI Gance

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 2,   Pages 145-149 doi: 10.1007/s11705-008-0030-3

Abstract: Results showed that at a given pressure, the impregnation rate is inversely proportional to melt viscosity

Keywords： polypropylene     diameter     influence     proportional     impregnation    

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Porosity model for flows in CMP

ZHANG Chao-hui, YE Wei, LUO Jian-bin, WEN Shi-zhu

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 4,   Pages 418-423 doi: 10.1007/s11465-006-0050-y

Abstract: that the fluids in the porous layer comply with Darcy s law, which states that the flow velocity is proportionalto the pressure gradient and inverse proportional to the viscosity.

Keywords： multilevel technique     three-dimensional     proportional     research     thicker    

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Application of an efficient stochastic calculation method on the seismic analysis of an isolated structure

Wei GUO, Zhiwu YU

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 4,   Pages 379-384 doi: 10.1007/s11709-012-0180-8

Abstract: An isolated structure often possesses distinct non-proportional damping characteristics.traditional seismic calculation theory and methods are derived based on the assumption that damping is proportional

Keywords： isolated structure     stochastic response     non-proportional damping     efficient     accurate     pseudo-excitation    

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Control algorithm of a servo platform

Shouyong XIE, Xiwen LI, Shuzi YANG, Mingjin YANG,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 353-355 doi: 10.1007/s11465-010-0098-6

Abstract: movement of a special-purpose three-axis servo platform, this paper presents an improved grey prediction proportional

Keywords： grey prediction     proportional integral derivative (PID) control     improved algorithm     weight     servo platform    

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Elliptical lobe shape gerotor pump design to minimize wear

Mohammad Reza KARAMOOZ RAVARI

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4,   Pages 429-434 doi: 10.1007/s11465-011-0247-6

Abstract: lobe shape rotors profile and curvature of them have been derived and then Specific flow and wear rate proportionalshape factor is changed for each value of number of outer rotor teeth in a feasible range and wear rate proportional

Keywords： gerotor pump     elliptical lobe shape pump     wear rate proportional factor (WRPF)     specific flow    

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Convergence performance comparisons of PID, MRAC, and PID+MRAC hybrid controller

Dan ZHANG,Bin WEI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 2,   Pages 213-217 doi: 10.1007/s11465-016-0386-x

Abstract:

This study proposes a hybrid controller by combining a proportional-integral-derivative (PID) control

Keywords： proportional-integral-derivative (PID) control     model reference adaptive control     hybrid control     convergence    

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Stability and coupling dynamic behavior of nonlinear journal active electromagnetic bearing rotor system

LU Yanjun, HEI Di, WANG Yuan, DAI Rong, LU Yanjun, LIU Heng, YU Lie

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 2,   Pages 193-199 doi: 10.1007/s11465-008-0023-4

Abstract: The system equations are formulated by combining equations for rotor motion and decentralized proportional

Keywords： proportional integral     bifurcation     corresponding     integral differential     predictor-corrector mechanism    

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High-precision gyro-stabilized control of a gear-driven platform with a floating gear tension device

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 487-503 doi: 10.1007/s11465-021-0635-5

Abstract: Then, a proportional-integral controller is designed to eliminate the steady-state error caused by theA proportional multiple-integral-based state augmented Kalman filter is proposed to estimate and compensate

Keywords： inertially stabilized platform     floating gear tension device     nonlinear friction     disturbance compensation     proportional    

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THD reduction with reactive power compensation for fuzzy logic DVR based solar PV grid connected system

Akhil GUPTA,Saurabh CHANANA,Tilak THAKUR

Frontiers in Energy 2014, Volume 8, Issue 4,   Pages 464-479 doi: 10.1007/s11708-014-0307-9

Abstract: Power quality improvement with comparison is conducted during fault with proportional integral (PI) and

Keywords： fuzzy logic     maximum power point tracking (MPPT)     proportional integral (PI)     control     voltage restorer    

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Power quality investigation of a solar PV transformer-less grid- connected system fed DVR

Akhil GUPTA,Saurabh CHANANA,Tilak THAKUR

Frontiers in Energy 2014, Volume 8, Issue 2,   Pages 240-253 doi: 10.1007/s11708-014-0322-x

Abstract: A proportional-integral (PI) controller based dynamic voltage restorer (DVR) control scheme is implemented

Keywords： data-based maximum power point tracking (MPPT)     total harmonic distortion (THD)     proportional integral    

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Modeling and control of a permanent magnet synchronous generator dedicated to standalone wind energy conversion system

Louar FATEH,Ouari AHMED,Omeiri AMAR,Djellad ABDELHAK,Bouras LAKHDAR

Frontiers in Energy 2016, Volume 10, Issue 2,   Pages 155-163 doi: 10.1007/s11708-016-0410-1

Abstract: The interest for the use of renewable energies has increased, because of the increasing concerns of the environmental problems. Among renewable energies, wind energy is now widely used. Wind turbines based on an asynchronous generator with a wound rotor present the inconvenience of requiring a system of rings and brooms and a multiplier, inferring significant costs of maintenance. To limit these inconveniences, certain manufacturers developed wind turbines based on synchronous machines with large number of pairs of poles coupled directly with the turbine, avoiding using the multiplier. If the generator is equipped with permanent magnets, the system of rings and brooms is eliminated. The control of the permanent magnet synchronous generator (PMSG) can be affected with the implementation of various techniques of control. This paper presented a new approach mainly based on the control strategy of power production system based on the PMSG. In fact, a mathematical model that simulates the Matlab chain was established with the introduction of control techniques, such as direct control of the torque (DTC) to control the load side converter (LSC), the control of the speed of the turbine and the DC-bus voltage ensured by PI regulators. To show the performance of the correctors used, some simulation results of the system were presented and analyzed.

Keywords： wind turbine     permanent magnet synchronous generator (PMSG)     converter     proportional-integral (PI)     control    

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Multiple target implementation for a doubly fed induction generator based on direct power control under unbalanced and distorted grid voltage

Heng NIAN,Yi-peng SONG

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 4,   Pages 321-334 doi: 10.1631/FITEE.1400170

Abstract: Based on the mathematical model of DFIG under unbalanced and distorted voltage, the proportional and

Keywords： Direct power control     Doubly fed induction generator     Unbalanced and distorted grid voltage     Vector proportional    

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Title Author Date Type Operation

Development of a novel two-stage proportional valve with a pilot digital flow distribution

Qiang GAO, Yuchuan ZHU, Changwen WU, Yulei JIANG

Journal Article

Proportional directional valve based automatic steering system for tractors Project supported

Jin-yi LIU,Jing-quan TAN,En-rong MAO,Zheng-he SONG,Zhong-xiang ZHU

Journal Article

The coupling of sand with ZVI/oxidants achieved proportional and highly efficient removal of arsenic

Sana Ullah, Xuejun Guo, Xiaoyan Luo, Xiangyuan Zhang, Yameng Li, Ziyu Liang

Journal Article

Impregnation of thermoplastic resin in jute fiber mat

LIU Xiaoye, DAI Gance

Journal Article

Porosity model for flows in CMP

ZHANG Chao-hui, YE Wei, LUO Jian-bin, WEN Shi-zhu

Journal Article

Application of an efficient stochastic calculation method on the seismic analysis of an isolated structure

Wei GUO, Zhiwu YU

Journal Article

Control algorithm of a servo platform

Shouyong XIE, Xiwen LI, Shuzi YANG, Mingjin YANG,

Journal Article

Elliptical lobe shape gerotor pump design to minimize wear

Mohammad Reza KARAMOOZ RAVARI

Journal Article

Convergence performance comparisons of PID, MRAC, and PID+MRAC hybrid controller

Dan ZHANG,Bin WEI

Journal Article

Stability and coupling dynamic behavior of nonlinear journal active electromagnetic bearing rotor system

LU Yanjun, HEI Di, WANG Yuan, DAI Rong, LU Yanjun, LIU Heng, YU Lie

Journal Article

High-precision gyro-stabilized control of a gear-driven platform with a floating gear tension device

Journal Article

THD reduction with reactive power compensation for fuzzy logic DVR based solar PV grid connected system

Akhil GUPTA,Saurabh CHANANA,Tilak THAKUR

Journal Article

Power quality investigation of a solar PV transformer-less grid- connected system fed DVR

Akhil GUPTA,Saurabh CHANANA,Tilak THAKUR

Journal Article

Modeling and control of a permanent magnet synchronous generator dedicated to standalone wind energy conversion system

Louar FATEH,Ouari AHMED,Omeiri AMAR,Djellad ABDELHAK,Bouras LAKHDAR

Journal Article

Multiple target implementation for a doubly fed induction generator based on direct power control under unbalanced and distorted grid voltage

Heng NIAN,Yi-peng SONG

Journal Article