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Journal Article 115

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maximum power point tracking (MPPT) 11

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tracking 4

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H∞ 2

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An adaptive sliding mode control technology for weld seam tracking

Jie LIU,Youmin HU,Bo WU,Kaibo ZHOU,Mingfeng GE

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1,   Pages 95-101 doi: 10.1007/s11465-015-0332-3

Abstract:

A novel adaptive sliding mode control algorithm is derived to deal with seam tracking control problemThe analytical results show that the proposed algorithm enables better high-precision tracking performance

Keywords： weld seam tracking     welding robotic manipulator     adaptive control     sliding mode control    

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A review on transport of coal seam gas and its impact on coalbed methane recovery

Geoff G.X. WANG, Xiaodong ZHANG, Xiaorong WEI, Xuehai FU, Bo JIANG, Yong QIN

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 2,   Pages 139-161 doi: 10.1007/s11705-010-0527-4

Abstract: This paper presents a summary review on mass transport of coal seam gas (CSG) in coal associated with

Keywords： mass transport     coal seam gas (CSG)     coalbed methane (CBM)     coal     CBM recovery     carbon dioxide storage    

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Study of mechanism of activating flux increasing weld penetration of AC A-TIG welding for aluminum alloy

HUANG Yong, FAN Ding, FAN Qinghua

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 4,   Pages 442-447 doi: 10.1007/s11465-007-0076-9

Abstract: When multi-component flux AF305 is used as surface activating flux for an aluminum alloy, the weld peneThe penetration has a relationship with the separate distribution of slag on the weld surface.The relationship between slag distribution and weld penetration was studied by adding aluminum powderDuring welding, the separate distribution of slag on the weld pool results in the great constrictionFinally, the weld penetration is increased.

Keywords： A-TIG welding     surface     DCEN     electrode negative     increase    

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Local fracture properties and dissimilar weld integrity in nuclear power plants

Guozhen WANG, Haitao WANG, Fuzhen XUAN, Shantung TU, Changjun LIU

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 3,   Pages 283-290 doi: 10.1007/s11465-013-0250-1

Abstract: and near interface zones, the use of the fracture properties ( -resistance curves) of base metals or weld

Keywords： local fracture properties     dissimilar metal welded joint     integrity assessment     strength mismatch     crack growth path    

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Research on the Impact of Mining in Steep Seam on Ground Struc ture

Gao Mingzhong,Wang Lieping

Strategic Study of CAE 2007, Volume 9, Issue 11,   Pages 142-146

Abstract:

According to the complex geologic condition of deep excavat ion in Huainan, probability-integral method is ewployed to study the for surface displacement due to coal extraction by optimization mining layouts.  Correlation parameters about subsidence under thick loose overburden and duplication mining are obtained. The results obtained may provide guidance for the subsidence-administrating. It is valuable of this paper to other coal mines which have similar geological and mining conditions.

Keywords： steep seam     surface movement and deformation     probability-integral method     predictions    

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Output tracking control of mobile manipulators based on dynamical sliding-mode control

WUYuxiang, FENG Ying, HU Yueming

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 110-115 doi: 10.1007/s11465-007-0019-5

Abstract: Moreover, a design method of the dynamical sliding-mode controller that is applied to the output tracking

Keywords： lower-dimensional     nonlinear     trajectory     tracking     diffeomorphism    

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Engineering Experiment Research of the Quantity Theoretical Orthogonal Design Optimal Method for the Coal-seam

Qin Shuyu,Qin Weihan

Strategic Study of CAE 2003, Volume 5, Issue 10,   Pages 52-55

Abstract:

To apply the orthogonal design to the optimization of the coal-seam injection technical parameters' combination is a better method that realizes the best effect of injection for the coal-seam withthis method, its effect cannot definitely satisfy the injection engineering requirement for the coal-seamFor this reason, in view of the coal-seam with unsteady geological factors and the characteristic that

Keywords： quantity theory     technical parameter     orthogonal design     coal-seam injection     experimental study    

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Study on Coal Seam Roof Gas Drainage from the Strike of Annular Fracture Areas by the Long Drill Method

Liu Zegong,Yuan Liang,Dai Guanglong,Shi Biming,Lu Ping,Tu Min

Strategic Study of CAE 2004, Volume 6, Issue 5,   Pages 32-38

Abstract:

Gas in working faces is mainly produced in the destressing and desorption process of the coal bed, gobs and adjacent strata. The coal beds are too soft to carry out bedding drilling and draw gas effectively. If gob gas suction is adopted in a large area,the project will prove not only extremely difficult,but also fail to draw out gas of high concentration. Therefore, efficient gas suction is technically determined by seeking fracture aisles for gas movement and gas zone of enrichment. In the course of mining and destressing, gas originating from large destressing areas will go through the fracture aisles of the full development areas and gather in annular fracture areas. The similar material experiments in the laboratory, the numerical simulation and the in-situ study are applied in this work in order to find the location of annular fracture areas in overlying formation. The long-drill mehtod for gas suction along the strike of annular fracture areas is adopted. Mining in coal beds with gas of high conentration and low permeability and gas suction can be operatod separately. During mining activities in the working faces,gas released from roof fracture areas will not flow into upper corners, so the technically drilling problem in soft coal beds with low permeability and high concentration gas can be solved. The application of this technology in the working faces of the gassy mines in Huainan shows that gas suction rate is above 60 percent, making it possible to mine safely,efficiently and intensively.

Keywords： coal seam     similar material experiment     numerical simulation     gas drainage     annular fracture area    

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Dynamic Target Tracking of Unmanned Aerial Vehicles Under Unpredictable Disturbances

Yanjie Chen,Yangning Wu,Limin Lan,Hang Zhong,Zhiqiang Miao,Hui Zhang,Yaonan Wang,

Engineering doi: 10.1016/j.eng.2023.05.017

Abstract: visual servoing (IBVS) method based on a velocity observer for an unmanned aerial vehicle (UAV) for trackingThe depth model ensures image feature accuracy and image trajectory smoothness in rotating target trackingComparative simulations and multistage experiments are conducted to illustrate the tracking stability, anti-disturbance ability, and tracking robustness of the proposed method with a dynamic rotating target

Keywords： Unmanned aerial vehicle     Visual servoing     Velocity observer     Target tracking    

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Wheel tracking methods to evaluate moisture sensitivity of hot-mix asphalt mixtures

Jie HAN,Harihar Shiwakoti

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 1,   Pages 30-43 doi: 10.1007/s11709-016-0318-1

Abstract: This research focused on wheel tracking devices to evaluate moisture sensitivity.The Asphalt Pavement Analyzer (APA) and the Hamburg Wheel Tracking Device (HWTD) were used for this research

Keywords： hot-mix asphalt     moisture sensitivity     rutting     wheel tracking test    

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Fractional order extremum seeking approach for maximum power point tracking of photovoltaic panels

Ammar NEÇAIBIA,Samir LADACI,Abdelfatah CHAREF,Jean Jacques LOISEAU

Frontiers in Energy 2015, Volume 9, Issue 1,   Pages 43-53 doi: 10.1007/s11708-014-0343-5

Abstract: In this paper, an integrated framework was proposed, which achieved both maximum power point tracking

Keywords： (ES)     fractional order control (FOC)     fractional calculus     photovoltaic (PV) panel     maximum power point tracking    

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Parametric equations for notch stress concentration factors of rib–deck welds under bending loading

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 595-608 doi: 10.1007/s11709-021-0720-1

Abstract: performed a parametric analysis to investigate the effects of multiple geometric parameters of a rib–deck weld

Keywords： notch stress concentration factor     rib–deck weld     parametric analysis     regression analysis     parametric    

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Time-varying formation tracking for uncertain second-order nonlinearmulti-agent systems

Mao-peng RAN, Li-hua XIE, Jun-cheng LI

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 1,   Pages 76-87 doi: 10.1631/FITEE.1800557

Abstract:

Our study is concerned with the time-varying formation tracking problem for second-order multi-agentexternal disturbance, and the states of the followers form a predefined time-varying formation while trackingThen we propose a novel ESO based time-varying formation tracking protocol.is proved that, under the proposed protocol, the ESO estimation error and the time-varying formation tracking

Keywords： Multi-agent system     Time-varying formation     Formation tracking     Nonlinear dynamics     Extended state observer    

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Characteristics of metal magnetic memory signals of different steels under static tension

Yiliang ZHANG, Ruibin GOU, Jimin LI, Gongtian SHEN,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 2,   Pages 226-232 doi: 10.1007/s11465-010-0012-2

Abstract: To study the characteristics of metal magnetic memory (MMM) signals of different steels during tensile test, static tension tests were applied to 30 pieces of Q235 and 16MnR base metal and welded specimens. During the various deformation periods, MMM signals are tested, and micrometallographic is observed. Furthermore, the derivative of magnetic intensity (d/d) is analyzed by mathematical and statistical methods to study the macro and micro corresponding relationships and difference among magnetic signals. Results show that despite the different magnetic intensity () curves of different materials, their d/d patterns in the yielding and necking stages are the same; welded specimens have the similar magnetic signal curves with their base metal, and the welded structure does not interfere with its distribution; different materials have their unique zero point (＝0) before being fractured, which is independent of the fracture location; there is a direct relationship between the intragranular slip and the changes of magnetic signals, which indicates the uneven plastic deformation.

Keywords： metal magnetic memory (MMM)     magnetic intensity (Hp)     static tension     weld    

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Full-mechanized caving mining technology of extremely thick and hard coal-seam with hard roof in shallow

Zhang Zhongwen,Wu Jinan

Strategic Study of CAE 2011, Volume 13, Issue 11,   Pages 107-112

Abstract: degree and rational mining method were analyzed by theoretical method on the basis of the 4th coal-seamratio would be realized by lengthening mining face and adding mining height in shallow buried hard coal-seam

Keywords： shallow buried depth     hard coal-seam with hard roof     top-coal caving difficulty degree     full-mechanized    

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Title Author Date Type Operation

An adaptive sliding mode control technology for weld seam tracking

Jie LIU,Youmin HU,Bo WU,Kaibo ZHOU,Mingfeng GE

Journal Article

A review on transport of coal seam gas and its impact on coalbed methane recovery

Geoff G.X. WANG, Xiaodong ZHANG, Xiaorong WEI, Xuehai FU, Bo JIANG, Yong QIN

Journal Article

Study of mechanism of activating flux increasing weld penetration of AC A-TIG welding for aluminum alloy

HUANG Yong, FAN Ding, FAN Qinghua

Journal Article

Local fracture properties and dissimilar weld integrity in nuclear power plants

Guozhen WANG, Haitao WANG, Fuzhen XUAN, Shantung TU, Changjun LIU

Journal Article

Research on the Impact of Mining in Steep Seam on Ground Struc ture

Gao Mingzhong,Wang Lieping

Journal Article

Output tracking control of mobile manipulators based on dynamical sliding-mode control

WUYuxiang, FENG Ying, HU Yueming

Journal Article

Engineering Experiment Research of the Quantity Theoretical Orthogonal Design Optimal Method for the Coal-seam

Qin Shuyu,Qin Weihan

Journal Article

Study on Coal Seam Roof Gas Drainage from the Strike of Annular Fracture Areas by the Long Drill Method

Liu Zegong,Yuan Liang,Dai Guanglong,Shi Biming,Lu Ping,Tu Min

Journal Article

Dynamic Target Tracking of Unmanned Aerial Vehicles Under Unpredictable Disturbances

Yanjie Chen,Yangning Wu,Limin Lan,Hang Zhong,Zhiqiang Miao,Hui Zhang,Yaonan Wang,

Journal Article

Wheel tracking methods to evaluate moisture sensitivity of hot-mix asphalt mixtures

Jie HAN,Harihar Shiwakoti

Journal Article

Fractional order extremum seeking approach for maximum power point tracking of photovoltaic panels

Ammar NEÇAIBIA,Samir LADACI,Abdelfatah CHAREF,Jean Jacques LOISEAU

Journal Article

Parametric equations for notch stress concentration factors of rib–deck welds under bending loading

Journal Article

Time-varying formation tracking for uncertain second-order nonlinearmulti-agent systems

Mao-peng RAN, Li-hua XIE, Jun-cheng LI

Journal Article

Characteristics of metal magnetic memory signals of different steels under static tension

Yiliang ZHANG, Ruibin GOU, Jimin LI, Gongtian SHEN,

Journal Article

Full-mechanized caving mining technology of extremely thick and hard coal-seam with hard roof in shallow

Zhang Zhongwen,Wu Jinan

Journal Article