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On the improvement design of dynamic characteristics for the roller follower of a variable-speed plate

Hui Ching FAN, Hong Sen YAN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1,   Pages 5-15 doi: 10.1007/s11465-012-0310-y

Abstract:

Without modifying the cam contour, a cam mechanism with a variable input speed trajectory offers anFirstly, the speed trajectory of cam is derived by employing Bezier curve, and motion continuity conditions

Keywords： cam mechanism     variable input speed     kinematic design     dynamic design     optimal design    

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Tacholess order-tracking approach for wind turbine gearbox fault detection

Yi WANG, Yong XIE, Guanghua XU, Sicong ZHANG, Chenggang HOU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 427-439 doi: 10.1007/s11465-017-0452-z

Abstract:

Monitoring of wind turbines under variable-speed operating conditions has become an important issueimportant transmission unit; it generally exhibits complex vibration signatures due to random variations in operatingconditions.based on a stationary assumption and thus inapplicable to the fault diagnosis of wind turbines under variable-speedoperating conditions.

Keywords： wind turbine     variable-speed operating conditions     Vold-Kalman filtering     tacholess order tracking    

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Power maximization of variable-speed variable-pitch wind turbines using passive adaptive neural fault

Hamed HABIBI, Hamed RAHIMI NOHOOJI, Ian HOWARD

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 377-388 doi: 10.1007/s11465-017-0431-4

Abstract: This paper studies the control methodology for variable-speed variable-pitch wind turbines includingtolerant control is designed passively to be robust on model uncertainties, disturbances including wind speed

Keywords： wind turbine nonlinear model     maximum power tracking     passive fault tolerant control     adaptive neural control    

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Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation

Yajvender Pal VERMA, Ashwani KUMAR

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 184-192 doi: 10.1007/s11708-012-0185-y

Abstract: The optimal speed control parameters have been used for the DFIG to increases its participation in frequency

Keywords： doubly fed induction generator (DFIG)     load frequency control     inertial control     wind energy conversion system (WECS)    

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Performance of PI controller for control of active and reactive power in DFIG operating in a grid-connectedvariable speed wind energy conversion system

Azzouz TAMAARAT,Abdelhamid BENAKCHA

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 371-378 doi: 10.1007/s11708-014-0318-6

Abstract: to present the complete modeling and simulation of a wind turbine driven DFIG in the second mode of operating

Keywords： wind power     doubly fed induction generator (DFIG)     vector control     active power     reactive power     maximum power point tracking (MPPT)    

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Identification of abnormal operating conditions and intelligent decision system

Xiuliang LI, Junjie JIANG, Hongye SU, Jian CHU

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4,   Pages 456-462 doi: 10.1007/s11465-011-0224-0

Abstract: state” is difficult to form using the soil dug in the capsule because it can cause three abnormal operatingconditions, including occlusion, caking in the capsule, and spewing at the outlet of the dump deviceThese abnormal operating conditions can, in turn, trigger failure in tunneling, cutter-device damage,This present paper effectively integrates the mechanism of abnormal operating conditions and knowledgeof soil conditioning, and establishes a uniform model of identifying abnormal conditions and intelligent

Keywords： earth pressure balance (EPB) shield machine     soil pressure cabin     abnormal operating condition     belief rule-base    

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Effects of operating conditions on membrane charge property and nanofiltration

Li XU, Li-Shun DU, Jing HE

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 4,   Pages 492-499 doi: 10.1007/s11705-011-1143-7

Abstract: The effects of the operating pressure, cross flow velocity, feed concentration, and temperature on theThe permeate flux and the retention rate under different nanofiltration operating conditions were alsoThe effects of the operating conditions on the permeate flux and the retention rate were explained by

Keywords： nanofiltration membrane     streaming potential     Zeta potential     permeate flux     retention rate    

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Performance design of a cryogenic air separation unit for variable working conditions using the lumped

Jinghua XU, Tiantian WANG, Qianyong CHEN, Shuyou ZHANG, Jianrong TAN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1,   Pages 24-42 doi: 10.1007/s11465-019-0558-6

Abstract: are widely used in global petrochemical and semiconductor industries, are being developed with high operatingelasticity under variable working conditions.basis of material and energy conservation laws, the piecewise-lumped parameters are extracted under variableworking conditions by using LPM.working conditions.

Keywords： performance design     air separation unit (ASU)     lumped parameter model (LPM)     variable working conditions    

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Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell

Tian TIAN, Jianjun TANG, Wei GUO, Mu PAN

Frontiers in Energy 2017, Volume 11, Issue 3,   Pages 326-333 doi: 10.1007/s11708-017-0489-z

Abstract: The proposed method includes 7 working conditions: open circuit voltage (OCV), idling, rated output,

Keywords： polymer electrolyte membrane fuel cell     accelerated life-time test     load cycling test     durability    

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A Novel Variable Speed Constant Frequency Doubly Fed Salient Pole Synchronous Machine

Ning Yuquan

Strategic Study of CAE 2004, Volume 6, Issue 12,   Pages 27-31

Abstract:

This paper presents a novel variable speed constant frequency doubly fed salient pole synchronousIt deals with basic theory and construction of variable speed salient pole synchronous machines, especiallyon variable speed constant frequency characteristics.Variable frequency converter at rotor supplies the excitation winding.It makes machine to achieve good character of variable speed constant frequency.

Keywords： salient pole synchronous machines     doubly fed variable speed constant frequency     AC excited    

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Induction motors variable speed drives diagnosis through rotor resistance monitoring

K. YAHIA, S. ZOUZOU, F. BENCHABANE

Frontiers in Energy 2012, Volume 6, Issue 4,   Pages 420-426 doi: 10.1007/s11708-012-0192-z

Abstract: Induction motor driven by vector control method makes high performance control of torque and speed possibleThe EKF estimates the rotor flux, speed and rotor resistance on line by using only measurements of theresults show the effectiveness of the proposed method in the cases of load torque perturbation and speed

Keywords： induction motor     vector control     broken rotor bars (BRBs) diagnostic     extended Kalman filter (EKF)    

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Best operating conditions to produce hydroxyapatite nanoparticles by means of a spinning disc reactor

A. F. D’ Intino,B. de Caprariis,M.L. Santarelli,N. Verdone,A. Chianese

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 156-160 doi: 10.1007/s11705-014-1427-9

Abstract: produced by a reaction-precipitation process by using a spinning disc reactor (SDR) at high rotational speedBy operating at pH= 10, a high purity Mg-HAP nanoparticles were obtained.the two reagents were fed over the disc symmetrically at 3 cm from the disc center and a rotational speed

Keywords： hydroxyapatite     nanoparticles     spinning disc reactor    

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Fast scaling approach based on cavitation conditions to estimate the speed limitation for axial piston

Qun CHAO, Jianfeng TAO, Junbo LEI, Xiaoliang WEI, Chengliang LIU, Yuanhang WANG, Linghui MENG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 1,   Pages 176-185 doi: 10.1007/s11465-020-0616-0

Abstract: However, the maximum rotational speed of axial piston machines is limited by the cavitation phenomenonThis paper presents a scaling law derived from an analytical cavitation model to estimate the speed limitationsThe cavitation model is experimentally verified using a high-speed axial piston pump, and the scalingResults show that the speed limitation is approximately proportional to the square root of the inlet

Keywords： axial piston pump     cavitation     speed limitation     scaling law    

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Properties of photosynthesis and spectral reflectance in leaves of maize under the low and variable waterconditions

Sun Li,Su Gengqiang,Liu Yanmei,Zhao Yanyan and Shi Gangrong

Strategic Study of CAE 2012, Volume 14, Issue 3,   Pages 70-75

Abstract:

The present study was carried out to examine the effects of low and variablewater conditions on plant biomass, root to shoot ratio, chlorophyll fluorescence, gas exchange and spectralUnder the low and variable water conditions, plant growth was inhibited, however, the root to shoot ratiophotosynthesis and spectral reflectance might be an important mechanism for maize to adapt the low and variablewater conditions.

Keywords： Maize     low and variable water conditions     chlorophyll fluorescence     gas exchange     spectral reflectance    

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DFIG sliding mode control fed by back-to-back PWM converter with DC-link voltage control for variablespeed wind turbine

Youcef BEKAKRA,Djilani BEN ATTOUS

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 345-354 doi: 10.1007/s11708-014-0330-x

Abstract: rotor connected to the electric grid through a back-to-back pulse width modulation (PWM) converter for variablespeed wind power generation.An original control strategy based on a variable structure control theory, also called sliding mode control

Keywords： doubly fed induction generator (DFIG)     wind turbine     back-to-back pulse width modulation (PWM)     DC-link voltage     sliding mode control    

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Title Author Date Type Operation

On the improvement design of dynamic characteristics for the roller follower of a variable-speed plate

Hui Ching FAN, Hong Sen YAN

Journal Article

Tacholess order-tracking approach for wind turbine gearbox fault detection

Yi WANG, Yong XIE, Guanghua XU, Sicong ZHANG, Chenggang HOU

Journal Article

Power maximization of variable-speed variable-pitch wind turbines using passive adaptive neural fault

Hamed HABIBI, Hamed RAHIMI NOHOOJI, Ian HOWARD

Journal Article

Dynamic contribution of variable-speed wind energy conversion system in system frequency regulation

Yajvender Pal VERMA, Ashwani KUMAR

Journal Article

Performance of PI controller for control of active and reactive power in DFIG operating in a grid-connectedvariable speed wind energy conversion system

Azzouz TAMAARAT,Abdelhamid BENAKCHA

Journal Article

Identification of abnormal operating conditions and intelligent decision system

Xiuliang LI, Junjie JIANG, Hongye SU, Jian CHU

Journal Article

Effects of operating conditions on membrane charge property and nanofiltration

Li XU, Li-Shun DU, Jing HE

Journal Article

Performance design of a cryogenic air separation unit for variable working conditions using the lumped

Jinghua XU, Tiantian WANG, Qianyong CHEN, Shuyou ZHANG, Jianrong TAN

Journal Article

Accelerated life-time test of MEA durability under vehicle operating conditions in PEM fuel cell

Tian TIAN, Jianjun TANG, Wei GUO, Mu PAN

Journal Article

A Novel Variable Speed Constant Frequency Doubly Fed Salient Pole Synchronous Machine

Ning Yuquan

Journal Article

Induction motors variable speed drives diagnosis through rotor resistance monitoring

K. YAHIA, S. ZOUZOU, F. BENCHABANE

Journal Article

Best operating conditions to produce hydroxyapatite nanoparticles by means of a spinning disc reactor

A. F. D’ Intino,B. de Caprariis,M.L. Santarelli,N. Verdone,A. Chianese

Journal Article

Fast scaling approach based on cavitation conditions to estimate the speed limitation for axial piston

Qun CHAO, Jianfeng TAO, Junbo LEI, Xiaoliang WEI, Chengliang LIU, Yuanhang WANG, Linghui MENG

Journal Article

Properties of photosynthesis and spectral reflectance in leaves of maize under the low and variable waterconditions

Sun Li,Su Gengqiang,Liu Yanmei,Zhao Yanyan and Shi Gangrong

Journal Article

DFIG sliding mode control fed by back-to-back PWM converter with DC-link voltage control for variablespeed wind turbine

Youcef BEKAKRA,Djilani BEN ATTOUS

Journal Article