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Ductility improvement of GFRP-RC beams using precast confined concrete block in compression zone

Frontiers of Structural and Civil Engineering doi: 10.1007/s11709-023-0968-8

Abstract: A control beam and four beams with different PCCBs were cast and tested under four-point bending conditions

Keywords： ductility     four-point bending test     glass fiber-reinforced polymer     precast confined concrete block    

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Consumption of carbon fiber plates in the reinforced concrete beams strengthened with CFPs

BU Liangtao, SHI Chuxian, SONG Li

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 4,   Pages 393-398 doi: 10.1007/s11709-007-0053-8

Abstract: Four-point bending flexural tests were conducted to one full-size reinforced concrete (RC) beam and three

Keywords： flexural     full-size     Four-point     consumption     experimental    

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Experimental study on mechanical properties of a novel micro-steel fiber reinforced magnesium phosphate cement-based concrete

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 4,   Pages 1047-1057 doi: 10.1007/s11709-021-0755-3

Abstract: development curve, fluidity, cubic compressive strength, modulus of elastic, axial compressive strength, and four-pointMSF had no apparent influence on the compressive strength, while it enhanced the four-point flexuralThe four-point flexural strength of specimens with MSF volume fraction from 0.25% to 0.75% were 12.3%

Keywords： magnesium phosphate cement-based concrete     micro-steel fibers     four-point flexural strength     compressive    

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Landing control method of a lightweight four-legged landing and walking robot

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 4, doi: 10.1007/s11465-022-0707-1

Abstract: A lightweight four-legged landing and walking robot called “FLLWR” is designed in this study.

Keywords： landing and walking robot     lunar exploration     buffer landing     compliance control    

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Motion planning and tracking control of a four-wheel independently driven steered mobile robot with multiple

Xiaolong ZHANG, Yu HUANG, Shuting WANG, Gen LI, Yuanlong XIE, Wei MENG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 504-527 doi: 10.1007/s11465-020-0626-y

Abstract: Safe and effective autonomous navigation in dynamic environments is challenging for four-wheel independently

Keywords： mobile robot     multiple maneuvering mode     motion planning     tracking control     receding horizon control    

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Pollution of NPEOs in four municipal sewage treatment plants in the north of China

HOU Shaogang, SUN Hongwen

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 2,   Pages 196-201 doi: 10.1007/s11783-007-0034-0

Abstract: represents the mixture, and NPEO represents the monomer) and its metabolites in the influent and effluent of fourFrom this point of view, the process of sewage treatment does not reduce but elevate the risk of NPEOs
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Nonlinear dynamics and analysis of a four-bar linkage with clearance

Yuanguang TANG, Zongyu CHANG, Xiaogang DONG, Yafei HU, Zhenjiang YU

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 160-168 doi: 10.1007/s11465-013-0258-6

Abstract:

In this paper, nonlinear dynamic behavior of a four-bar linkage considering clearance is studied.

Keywords： four-bar linkage     chaos     bifurcation     strange attractors     dynamics    

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Obstacle-circumventing adaptive control of a four-wheeled mobile robot subjected to motion uncertainties

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0753-3

Abstract: To achieve the collision-free trajectory tracking of the four-wheeled mobile robot (FMR), existing methods

Keywords： four-wheeled mobile robot     obstacle-circumventing adaptive control     adaptive anti-disturbance terminal    

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System construction of a four-side primary permanent-magnet linear motor drive mechanical press

Jintao LIANG, Zhengfeng MING, Peida LI

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 600-609 doi: 10.1007/s11465-020-0597-z

Abstract: The structure of a four-side PPMLM drive press is presented based on our previous research.

Keywords： mechanical press     direct drive     primary permanent-magnet linear motor (PPMLM)     servo system     active disturbance rejection control (ADRC)     prototype experiment    

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Performance investigation of artificial intelligence based controller for three phase four leg shunt

J. JAYACHANDRAN,R. MURALI SACHITHANANDAM

Frontiers in Energy 2015, Volume 9, Issue 4,   Pages 446-460 doi: 10.1007/s11708-015-0378-2

Abstract: In this paper, the choice of power quality compensator is a DSTATCOM which constitutes a three phase four

Keywords： neural network     DSTATCOM     neutral current mitigation     total harmonic distortion (THD)     three phase four wire    

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Towards neutral steer and sideslip reduction for four-wheeled electric vehicles

Guisheng ZHAI, Masayuki NAKA, Tomoaki KOBAYASHI, Joe IMAE

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1,   Pages 16-22 doi: 10.1007/s11465-012-0316-5

Abstract:

This paper proposes an approach to achieving both neutral steer and sideslip reduction for four-wheeled

Keywords： four-wheeled electric vehicles     neutral steer     sideslip reduction     servo system     ?    

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Comparison between four piezoelectric energy harvesting circuits

Jinhao Qiu, Hao Jiang, Hongli Ji, Kongjun ZHU

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 2,   Pages 153-159 doi: 10.1007/s11465-009-0031-z

Abstract: This paper investigates and compares the efficiencies of four different interfaces for vibration-basedAmong those four circuits, two circuits adopt the synchronous switching technique, in which the circuit

Keywords： energy harvesting     piezoelectric materials     synchronized switching    

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STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4,   Pages 503-509 doi: 10.15302/J-FASE-2023528

Abstract:

STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Keywords： GREEN     AGRICULTURAL     PROMOTE     POLLUTION     SOURCE     DEVELOPMENT     POINT     STRENGTHENING     CONTROL    

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Real-Time Four-Dimensional Trajectory Generation Based on Gain-Scheduling Control and a High-Fidelity Article

Olusayo Obajemu, Mahdi Mahfouf, Lohithaksha M. Maiyar, Abrar Al-Hindi, Michal Weiszer, Jun Chen

Engineering 2021, Volume 7, Issue 4,   Pages 495-506 doi: 10.1016/j.eng.2021.01.009

Abstract: This paper proposes a new approach for generating efficient four-dimensional trajectories (4DTs) on the

Keywords： Aircraft model     Intelligent taxiing     Optimization     Four-dimensional trajectory    

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Trajectory planning of mobile robots using indirect solution of optimal control method in generalized point-to-point

M. NAZEMIZADEH, H. N. RAHIMI, K. AMINI KHOIY

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1,   Pages 23-28 doi: 10.1007/s11465-012-0304-9

Abstract:

This paper presents an optimal control strategy for optimal trajectory planning of mobile robots by considering nonlinear dynamic model and nonholonomic constraints of the system. The nonholonomic constraints of the system are introduced by a nonintegrable set of differential equations which represent kinematic restriction on the motion. The Lagrange’s principle is employed to derive the nonlinear equations of the system. Then, the optimal path planning of the mobile robot is formulated as an optimal control problem. To set up the problem, the nonlinear equations of the system are assumed as constraints, and a minimum energy objective function is defined. To solve the problem, an indirect solution of the optimal control method is employed, and conditions of the optimality derived as a set of coupled nonlinear differential equations. The optimality equations are solved numerically, and various simulations are performed for a nonholonomic mobile robot to illustrate effectiveness of the proposed method.

Keywords： mobile robot     trajectory planning     nonlinear dynamic     optimal control    

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Title Author Date Type Operation

Ductility improvement of GFRP-RC beams using precast confined concrete block in compression zone

Journal Article

Consumption of carbon fiber plates in the reinforced concrete beams strengthened with CFPs

BU Liangtao, SHI Chuxian, SONG Li

Journal Article

Experimental study on mechanical properties of a novel micro-steel fiber reinforced magnesium phosphate cement-based concrete

Journal Article

Landing control method of a lightweight four-legged landing and walking robot

Journal Article

Motion planning and tracking control of a four-wheel independently driven steered mobile robot with multiple

Xiaolong ZHANG, Yu HUANG, Shuting WANG, Gen LI, Yuanlong XIE, Wei MENG

Journal Article

Pollution of NPEOs in four municipal sewage treatment plants in the north of China

HOU Shaogang, SUN Hongwen

Journal Article

Nonlinear dynamics and analysis of a four-bar linkage with clearance

Yuanguang TANG, Zongyu CHANG, Xiaogang DONG, Yafei HU, Zhenjiang YU

Journal Article

Obstacle-circumventing adaptive control of a four-wheeled mobile robot subjected to motion uncertainties

Journal Article

System construction of a four-side primary permanent-magnet linear motor drive mechanical press

Jintao LIANG, Zhengfeng MING, Peida LI

Journal Article

Performance investigation of artificial intelligence based controller for three phase four leg shunt

J. JAYACHANDRAN,R. MURALI SACHITHANANDAM

Journal Article

Towards neutral steer and sideslip reduction for four-wheeled electric vehicles

Guisheng ZHAI, Masayuki NAKA, Tomoaki KOBAYASHI, Joe IMAE

Journal Article

Comparison between four piezoelectric energy harvesting circuits

Jinhao Qiu, Hao Jiang, Hongli Ji, Kongjun ZHU

Journal Article

STRENGTHENING NON-POINT SOURCE POLLUTION CONTROL TO PROMOTE AGRICULTURAL GREEN DEVELOPMENT

Journal Article

Real-Time Four-Dimensional Trajectory Generation Based on Gain-Scheduling Control and a High-Fidelity

Olusayo Obajemu, Mahdi Mahfouf, Lohithaksha M. Maiyar, Abrar Al-Hindi, Michal Weiszer, Jun Chen

Journal Article

Trajectory planning of mobile robots using indirect solution of optimal control method in generalized point-to-point

M. NAZEMIZADEH, H. N. RAHIMI, K. AMINI KHOIY

Journal Article