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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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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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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-connected variablespeed 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: Due to several factors, wind energy becomes an essential type of electricity generation. The share of this type of energy in the network is becoming increasingly important. The objective of this work is to present the modeling and control strategy of a grid connected wind power generation scheme using a doubly fed induction generator (DFIG) driven by the rotor. This paper is to present the complete modeling and simulation of a wind turbine driven DFIG in the second mode of operating (the wind turbine pitch control is deactivated). It will introduce the vector control, which makes it possible to control independently the active and reactive power exchanged between the stator of the generator and the grid, based on vector control concept (with stator flux or voltage orientation) with classical PI controllers. Various simulation tests are conducted to observe the system behavior and evaluate the performance of the control for some optimization criteria (energy efficiency and the robustness of the control). It is also interesting to play on the quality of electric power by controlling the reactive power exchanged with the grid, which will facilitate making a local correction of power factor.

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

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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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Evaluation of measurement uncertainty of the high-speed variable-slit system based on the Monte Carlo

Yin ZHANG, Jianwei WU, Kunpeng XING, Zhongpu WEN, Jiubin TAN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4, Pages 517-537 doi: 10.1007/s11465-020-0589-z

Abstract: paper presents a dynamic and static error transfer model and uncertainty evaluation method for a high-speedvariable-slit system based on a two-dimensional orthogonal double-layer air-floating guide rail structurethe moving component it is attached to and the moving component of the following blade during high-speedFirst, an error transfer model of the high-speed variable-slit system is established, and the influence

Keywords： air-floating guide rail error transfer model driving and following structure dynamic error uncertainty evaluation Monte Carlo method

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A new variable-mode control strategy for LLC resonant converters operating in a wide input voltage range Article

Hui-pin LIN,Xiao-guang JIN,Liang XIE,Jin HU,Zheng-yu LU

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 3, Pages 410-422 doi: 10.1631/FITEE.1600029

Abstract: This paper proposes a new variable-mode control strategy that is applicable for LLC resonant convertersoperating in a wide input voltage range.incorporates advantages from full-bridge LLC resonant converters, half-bridge LLC resonant converters, variable-frequencyWhen the input voltage is very low, it works in a full-bridge circuit and variable frequency mode (FB_VFWhen the input voltage further increases, it shifts into a half-bridge circuit and variable frequency

Keywords： LLC Full bridge Half bridge Variable frequency Phase shift Wide input voltage range

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Optimal Scheduling of Variable-pressure Variable-flow Operation of Inverter-drive Pumps Connected in

Li Hongbin,Zhang Chenghui,Song Jun

Strategic Study of CAE 2001, Volume 3, Issue 9, Pages 52-57

Abstract:

The paper analyzes common methods for the optimal scheduling modeling problem of variable-pressurevariable-flow operation of inverter-drive pumps connected in parallel and compares the merits and defects

Keywords： optimal scheduling nonlinear bounded programming speed regulation of pumps

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Efficiency Optimization of Variable Frequency Variable Speed Water-supply Pumping Stations Based on Genetic

Liao Li,Lin Jiaheng,Zhang Chenghui

Strategic Study of CAE 2002, Volume 4, Issue 9, Pages 54-58

Abstract:

Water-supply enterprise consumes much of electric energy in the city, and the quantity it consumes mainly depends on the pumps of pumping stations. So it is important to optimize operation of water-supply pumping stations, for safety water supply and saving energy. This paper presents an optimal scheduling model of water-supply pumping stations based on approximation of exponent curve. Corresponding to the model, solutions based on genetic algorithm are introduced. The simulation resuls illustrate its validity.

Keywords： water-supply pumping station approximation of numerical value optimization genetic algorithm

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The status and outlook of wind power converters

Ma Weiming,Xiao Fei

Strategic Study of CAE 2011, Volume 13, Issue 1, Pages 11-20

Abstract:

The power converter, which is one of the critical equipments of the system, must meet the requirements of high power density, high reliability and excellent control performance. Great development has been achieved in China about wind power converters, which is still lagging behind the advanced level of the world. In this paper, some critical technologies of direct driven wind power converter systems are introduced and the related design ideas are proposed.

Keywords： wind power generation variable speed constant frequency doubly fed induction generation system direct

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Approximation of structural damping and input excitation force

Mohammad SALAVATI

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2, Pages 244-254 doi: 10.1007/s11709-016-0371-9

Abstract: On the other hand, solving the inverse problem of the input force estimation and its distribution toIn this paper model-based damping approximation method and a model-less structural input estimation are

Keywords： structural modal parameters damping identification method input excitation force identification Inverse

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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 issuebased on a stationary assumption and thus inapplicable to the fault diagnosis of wind turbines under variable-speed

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

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Mechanical design, modeling, and identification for a novel antagonistic variable stiffness dexterous

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0691-5

Abstract: This study traces the development of dexterous hand research and proposes a novel antagonistic variablefinger mechanism not only achieves passive compliance against physical impacts, but also implements the variable

Keywords： multifingered hand mechanism design robot safety variable stiffness actuator

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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

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

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-connected variablespeed wind energy conversion system

Azzouz TAMAARAT,Abdelhamid BENAKCHA

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

Evaluation of measurement uncertainty of the high-speed variable-slit system based on the Monte Carlo

Yin ZHANG, Jianwei WU, Kunpeng XING, Zhongpu WEN, Jiubin TAN

Journal Article

A new variable-mode control strategy for LLC resonant converters operating in a wide input voltage range

Hui-pin LIN,Xiao-guang JIN,Liang XIE,Jin HU,Zheng-yu LU

Journal Article

Optimal Scheduling of Variable-pressure Variable-flow Operation of Inverter-drive Pumps Connected in