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RISS 인기검색어
- 검색키워드
- 저자 : Fuyang Chen (검색결과 5 건)
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Fuyang Chen,Zheng Wang,Bin Jiang,Changyun Wen 제어·로봇·시스템학회 2015 International Journal of Control, Automation, and Vol.13 No.3
In this paper, an improved nonlinear model for a 3-DOF helicopter and its self-repairing control scheme are investigated via quantum information technique. Firstly, adopting the mechanism analysis, a modified dynamic model is developed, in which the couplings among axes are considered. Such a modeling scheme is useful for applications when the accuracy of original model can not be satisfied. Then, a reconfigurable control scheme is designed for the twin rotor helicopter with multiple faults and parametric uncertainties, which combines active disturbance rejection control method with model reference adaptive control method. In addition, quantum information technique is used to increase the accuracy of self-repairing control of helicopter. Finally, simulation verification is presented in both aspects of modeling and control. The effectiveness and feasibility of the proposed scheme are verified by comparative simulations.
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Fuzzy Adaptive Hybrid Compensation for Compound Faults of Hypersonic Flight Vehicle
Kaiyu Hu,Fuyang Chen,Zian Cheng 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.6
Based on the adaptive control technique, this study investigates the active-passive hybrid fault-tolerant control (FTC) for hypersonic flight vehicles (HFVs) with compound faults, including system and actuator faults. System and actuator compound faults are defined in multi-augmented Takagi-Sugeno fuzzy HFV systems. Indirect passive compensation factors shield the system faults. An observer with adaptive learning rates that combine fault magnitude and fuzzy premise variable is then designed to estimate actuator faults, where a novel bionic variable parameter algorithm improves the sensitivity and accuracy of fault estimation to the incipient fault deviations. Hence the fault-tolerant controller actively compensates for the actuator faults by using estimated information while shielding the system faults. Finally, the improved adaptive active-passive hybrid FTC for compound faults are completed, and the system’s robust stability is proven. Simulation results are provided to illustrate the effectivenessof the proposed FTC scheme.
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Deng, Xin-Fa,Zhang, Fuyang,Song, Jun,Chen, Yi-Qing,Jiang, Peng The Korean Astronomical Society 2012 Journal of The Korean Astronomical Society Vol.45 No.3
Using the volume-limited Main galaxy sample constructed from the Sloan Digital Sky Survey Data Release 7 (SDSS DR7), we explore the environmental dependence of the fraction of 'unconventional' galaxies: luminous blue and faint red. It is found that the fraction of faint red increases apparently with increasing local density, and the fraction of luminous blue declines substantially with increasing local density, which shows that there is an environmental dependence for color beyond that for luminosity.
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Three-Dimensional Seismic Isolation Study of Single-Layer Reticulated Domes by Parameter Analysis
Gui-Bo Nie,Dong-fang Li,Xudong Zhi,Qiang Chen,Fuyang Wang 한국강구조학회 2021 International Journal of Steel Structures Vol.21 No.6
Spatial structures, represented by reticulated domes, have developed rapidly in the last several decades due to their reasonable mechanical properties and beautiful structural shape. However, several spatial structure collapses have occurred during the recent frequent earthquakes in China, especially the 2013 Lushan earthquake. These collapses have altered the traditional understanding that the spatial structure has good seismic performance. Real seismic damage cases reveal that a spatial structure in a severe earthquake zone with unreasonable seismic design cannot maintain its functional characteristics; therefore, there is an urgent need for improvements to enhance the seismic performance of spatial structures. This paper proposes a new three-dimensional isolation spring support (TISS). To study the mechanical properties of this support, corresponding experiments were performed, and the constitutive relation of this support was investigated. A simplifi ed fi nite element model of the new TISS was defi ned in ABAQUS to conduct a seismic isolation study of single-layer reticulated domes. And then the infl uence of diff erent parameters on the seismic isolation performance of the TISS was analysed. The parameter analysis results indicated that friction plays an important role in the mechanical properties of the support and thus causes diff erent seismic isolation eff ects under small earthquakes and severe earthquakes. At the same time, because of the design concept of the support, a non-linear relation exists between the seismic isolation eff ect and stiff ness such that under severe earthquakes. On the other hand, the TISS also has preferable isolation performance on the defective reticulated domes. Therefore, the three-dimensional isolation support presented in this paper has preferable application prospects and potential economic benefi ts that could be applied extensively in the three-dimensional isolation area of spatial structures. In addition, the numerical analysis procedure based on ABAQUS can be used to accurately analyse the isolation property and to lay the foundation for the practical function of isolation supports and the seismic design of structures.
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Fu Yang,Gang Chen,Yu Kang,Dongmin Ma,Qilin Chen,Tian Tao,Fu Deliang 한국지질과학협의회 2020 Geosciences Journal Vol.24 No.2
The U-Pb ages of single zircon grains contained in the sandstone samples were analyzed by the LA-ICP-MS method, the sediment provenances and geological significance were discussed. The LA-ICP-MS zircon U-Pb dating from the sandstones, tuffaceous sandstones and volcanic tuffs of the Pingliang and Zhaolaoyu Formations along the southwestern Ordos Block are used to limit the maximum depositional age and material sources. The results show that: (1) The youngest ages of zircon dating in the three samples are 445 Ma, 444 Ma and 443 Ma, respectively, suggesting that the studied Formations were deposited in the Late Ordovician. (2) The detrital zircon U-Pb age analysis of the sandstones sample from the Pinliang Formation clustered in the 445–477 Ma, 588–1548 Ma and 1612–2496 Ma with the corresponding youngest peak age of 454.5 ± 3.3 Ma. (3) The distribution of zircon U-Pb age in sandstone samples showing that the sedimentary rocks detritus was mainly sourced from the North Qinling-Qilian terranes and the NCC, and has double provenance supply in the north and south. The material source of the tuffaceous sandstones and volcanic tuffs mainly comes from the volcanic and magmatic activity related to the North Qilian-North Qinling Island Arcs.
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