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Your search keyword '"Zhang, Guobin"' showing total 171 results
Start Over Author "Zhang, Guobin" Publisher elsevier bv
171 results on '"Zhang, Guobin"'

22. Effects of intensive blood pressure lowering on cerebral ischaemia in thrombolysed patients: insights from the ENCHANTED trial

Author

Chen, Chen, primary, Ouyang, Menglu, additional, Ong, Sheila, additional, Zhang, Luyun, additional, Zhang, Guobin, additional, Delcourt, Candice, additional, Mair, Grant, additional, Liu, Leibo, additional, Billot, Laurent, additional, Li, Qiang, additional, Chen, Xiaoying, additional, Parsons, Mark, additional, Broderick, Joseph P., additional, Demchuk, Andrew M., additional, Bath, Philip M., additional, Donnan, Geoffrey A., additional, Levi, Christopher, additional, Chalmers, John, additional, Lindley, Richard I., additional, Martins, Sheila O., additional, Pontes-Neto, Octavio M., additional, Venturelli, Paula Muñoz, additional, Olavarría, Verónica, additional, Lavados, Pablo, additional, Robinson, Thompson G., additional, Wardlaw, Joanna M., additional, Li, Gang, additional, Wang, Xia, additional, Song, Lili, additional, and Anderson, Craig S., additional

Published
2023
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24. Elucidating non-uniform assembling effect in large-scale PEM fuel cell by coupling mechanics and performance models

Author

Huo, Wenming, primary, Wu, Peng, additional, Xie, Biao, additional, Du, Qing, additional, Liang, Jinqiao, additional, Qin, Zhengguo, additional, Zhang, Guobin, additional, Sarani, Iman, additional, Xu, Wenzhen, additional, Liu, Bohao, additional, Wang, Bowen, additional, Yin, Yan, additional, Lin, Jiewei, additional, and Jiao, Kui, additional

Published
2023
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29. Dynamic modeling and simulation of a novel mechanism for adhesive capture of space debris

Author

Zhiwei Feng, Zhang Guobin, Chen Qingquan, Tao Yang, and Qingbin Zhang

Subjects
Atmospheric Science, Computer simulation, Computer science, Process (computing), Aerospace Engineering, Mechanical engineering, Astronomy and Astrophysics, Multibody system, System dynamics, Mechanism (engineering), Geophysics, Space and Planetary Science, Robustness (computer science), General Earth and Planetary Sciences, Beam (structure), Space debris
Abstract

Flexible capture has high applicability in the removal of space debris. In this paper, a novel adhesive capture mechanism is proposed, the multibody dynamic modeling method of the capture system is detailed, and an investigation of the adhesive capture process by numerical simulation is presented. First, the passive trigger mechanism of the capture device is described. Second, based on the classical rigid body mechanics and the fully parameterized ANCF beam element, the multibody model of the capture device is detailed. A contact detection algorithm is proposed to take the failure of adhesive connection into account, and its robustness and effectiveness are demonstrated. Finally, investigations of the dynamics during the capture process in two typical capture conditions are described and the impact of some system parameters on the capture effectiveness is discussed. The simulation results provide key parameters for the selection of the adhesive material and show the practical applicability of the capture mechanism.

Published
2021

35. A simplified model for fast analysis of the deployment dynamics of tethered-net in space

Author

Zhang Guobin, Tao Yang, Chen Qingquan, Zhiwei Feng, and Qingbin Zhang

Subjects
Atmospheric Science, 010504 meteorology & atmospheric sciences, Computer simulation, Geometric analysis, Computer science, Aerospace Engineering, Astronomy and Astrophysics, Kinematics, Mechanics, Radius, Space (mathematics), 01 natural sciences, Momentum, Geophysics, Space and Planetary Science, 0103 physical sciences, Net (polyhedron), General Earth and Planetary Sciences, 010303 astronomy & astrophysics, 0105 earth and related environmental sciences, Space debris
Abstract

The tethered-net is one of the most promising flexible space debris cleaning technologies to be developed in recent years. Momentum and geometric analysis were used to select four characteristic parameters of the tethered-net ejection system—the radius of the circumcircle of the net, the ratio of the bullet mass to the net mass, the ejection velocity of the bullet, and the ejection angle—to establish a set of formulas that describe the kinematics of the net deployment. The net deployment performance evaluation criteria were obtained with a concise analytical form. The calculation results of this set of analytical formulas are in good agreement with the numerical simulation results of the mass-spring model. Furthermore, this set of analytical formulas reveals some intrinsic characteristics of the net deployment dynamics. For example, the flying distance of the net from the start of ejection to the largest area is mainly determined by the radius of the circumcircle of the net and ejection angle. It is believed that the analytic formulas proposed are suitable for the preliminary design of a tethered-net system, especially when numerical simulation is time consuming.

Published
2021

43. Adaptive fuzzy discrete-time fault-tolerant control for permanent magnet synchronous motors based on dynamic surface technology

Author

Yumei Ma, Jiapeng Liu, Jinpeng Yu, Liu Zhanjie, and Zhang Guobin

Subjects
0209 industrial biotechnology, Permanent magnet synchronous motor, Computer science, Cognitive Neuroscience, Fault tolerance, 02 engineering and technology, Fuzzy logic, Computer Science Applications, Euler method, symbols.namesake, 020901 industrial engineering & automation, Discrete time and continuous time, Artificial Intelligence, Control theory, Robustness (computer science), Backstepping, Bounded function, 0202 electrical engineering, electronic engineering, information engineering, symbols, 020201 artificial intelligence & image processing
Abstract

The discrete-time fault-tolerant control method for permanent magnet synchronous motors (PMSMs) is investigated for the first time in this paper based on adaptive fuzzy theory, where the designed controllers consider faults containing both loss of effectiveness and bias. Firstly, with the help of Euler method, the discrete-time model of PMSMs is obtained. Secondly, adaptive fuzzy theory is used to realize fault-tolerant control of PMSMs. Next, dynamic surface control is used to resolve the problems of “explosion of complexity” and noncausal in discrete-time systems caused by backstepping. It is proved that the proposed method can guarantee all signals and states in the closed-loop system are semi-global uniform ultimate bounded when the faults occur and the position tracking error can converge to a small neighborhood of the origin. Finally, simulation results show that the proposed control method has strong fault-tolerant performance and robustness.

Published
2020

44. Design and optimization of a space net capture system based on a multi-objective evolutionary algorithm

Author

Zhiwei Feng, Zhang Guobin, Chen Qingquan, Qiangang Tang, Gao Qingyu, and Qingbin Zhang

Subjects
020301 aerospace & aeronautics, Mathematical optimization, Optimization problem, Optimization algorithm, Computer science, Evolutionary algorithm, Aerospace Engineering, 02 engineering and technology, Abstract space, Space (mathematics), Net (mathematics), 01 natural sciences, Multi-objective optimization, 0203 mechanical engineering, 0103 physical sciences, Systems design, 010303 astronomy & astrophysics
Abstract

Space net capture is an innovative concept for active debris removal that provides a prospective method for the removal of large, non-cooperative space targets. The design of a space net capture system must meet two basic requirements: maximizing the capture ability and minimizing the system cost. This paper presents an inexpensive multi-objective optimization framework to solve this design problem. In this framework, a design optimization approach using a lumped parameter modelling method as well as an improved inexpensive multi-objective optimization algorithm is proposed. The system mass and effective distance are chosen as objectives of this optimization problem. The simulation results reveal that the multi-objective optimization framework is feasible and effective for the design of a space net capture system, and the designer preferred solutions that enhance system design are reliably identified.

Published
2020

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