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A New Tracking Control Method of Maglev Systems
Anh Tuan Vo,Hee-Jun Kang,Thanh Nguyen Truong,Van Cuong Nguyen 제어로봇시스템학회 2021 제어로봇시스템학회 국내학술대회 논문집 Vol.2021 No.6
In this paper, a new tracking control of maglev systems (MLSs) is introduced. The control proposal is developed based on fixed-time control theory and non-singular fast terminal sliding mode control (NFTSMC). Consequently, the proposed control algorithm provides better trajectory tracking performance than the conventional NFTSMC, including stronger against dynamical uncertainties and exterior disturbances, faster convergence in fixed-time, and smaller control errors. The Lyapunov Principle has been used to confirm full qualifications of stability and convergence in fixed-time. The effectiveness of the control proposal also is verified through the experiments performed for trajectory tracking control of a maglev system (MLS).
Dielectric and ferroelectric characteristics of doped BZT-BCT ceramics sintered at low temperature
Dang Anh Tuan,Le Dai Vuongb,Vo Thanh Tung,Ngo Ngoc Tuan,Nguyen Trung Duong 한양대학교 세라믹연구소 2018 Journal of Ceramic Processing Research Vol.19 No.1
The paper presents relaxor properties of lead-free nanostructured ZnO doped BZT-BCT ceramics sintered at lowtemperature. Curie-Weiss, Quadratic, Vogel-Fulcher laws were applied to study dielectric properties. The fitting experimentaldata to the mentioned laws showed the typical diffuseness characteristic of the materials as a result of the substitution of Zn2+ions into BZT-BCT substrate. Also, received ferroelectric loops were well saturated and fairly slim for all samples that assert againdiffuse ferroelectric nature in the investigated ceramics. The characterized values of remnant polarization, Pr, and coercive field,Ec, depended on ZnO nanoparticles concentration. According to that, when varying doping content in the region of 0.00-0.25%wt,Pr improved and reached a maximum value of 6.19 μC/cm2 at 0.15%wt, then decreased monotonously. Meanwhile Eccontinuously intensified in the range of 1.36-2.72 kV/cm. In other words, nanosized ZnO particles made the ceramics harder
Development of Realtime EtherCAT Master Library Using INtime
Yongseon Moon,Tuan Anh Vo Trong,Nak Yong Ko,Dong Jin-Seo,Seung-Woo Lim 한국지능시스템학회 2009 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.9 No.2
This paper proposes an architecture of a real-time EtherCAT master library called RtEML. The controls EtherCAT slaves under EtherCAT protocol in real-time. It provides a simple programming interface which is useful in developing robot application in C/C++ or C#. To achieve deterministic, hard real-time control in Microsoft Windows environment without additional hardware, INtime is used. Since INtime is designed specifically to take advantage of the powerful capabilities of the x86 processor architecture, the proposed RtEML achieves micro¬seconds of real-time performance.
Investigating the Economic Relationship between Provinces in Vietnam: A Spatial Regression Approach
Xuan Vinh Vo,Thi Tuan Anh Tran,Van Thang Nguyen 중앙대학교 경제연구소 2020 Journal of Economic Development Vol.45 No.1
To develop provincial economies, it is necessary to focus on not only the internal resources of a province but also the relationship among provinces which can lead to the spillover effect throughout the country. This paper examines the economic relationship and spillover effect between provinces in Vietnam by spatial regression approach with data collected from 2010 to 2017 from statistical yearbooks. The results show that there exists a spatial correlation between provinces in terms of provincial gross domestic product, capital investment and labor force. The results also demonstrate that capital and labor factors not only affect the gross domestic product of the host province but also affect the neighboring ones. The finding implies the significant spillover effect between provinces.
The complete mitochondrial genome sequence of the indigenous I pig (Sus scrofa) in Vietnam
Hieu Duc Nguyen,Tuan Anh Bui,Phuong Thanh Nguyen,Oanh Thi Phuong Kim,Thuy Thi Bich Vo 아세아·태평양축산학회 2017 Animal Bioscience Vol.30 No.7
Objective: The I pig is a long nurtured longstanding breed in Vietnam, and contains excellent indigenous genetic resources. However, after 1970s, I pig breeds have become a small population because of decreasing farming areas and increasing pressure from foreign breeds with a high growth rate. Thus, there is now the risk of the disappearance of the I pigs breed. The aim of this study was to focus on classifying and identifying the I pig genetic origin and supplying molecular makers for conservation activities. Methods: This study sequenced the complete mitochondrial genome and used the sequencing result to analyze the phylogenetic relationship of I pig with Asian and European domestic pigs and wild boars. The full sequence was annotated and predicted the secondary tRNA. Results: The total length of I pig mitochondrial genome (accession number KX094894) was 16,731 base pairs, comprised two rRNA (12S and 16S), 22 tRNA and 13 mRNA genes. The annotation structures were not different from other pig breeds. Some component indexes as AT content, GC, and AT skew were counted, in which AT content (60.09%) was smaller than other pigs. We built the phylogenetic trees from full sequence and D loop sequence using Bayesian method. The result showed that I pig, Banna mini, wild boar (WB) Vietnam and WB Hainan or WB Korea, WB Japan were a cluster. They were a group within the Asian clade distinct from Chinese pigs and other Asian breeds in both phylogenetic trees (0.0004 and 0.0057, respectively). Conclusion: These results were similar to previous phylogenic study in Vietnamese pig and showed the genetic distinctness of I pig with other Asian domestic pigs.
Development of Realtime EtherCAT Master Library Using INtime
Moon, Yong-Seon,Trong, Tuan Anh Vo,Ko, Nak-Yong,Seo, Dong-Jin,Lim, Seung-Woo Korean Institute of Intelligent Systems 2009 INTERNATIONAL JOURNAL of FUZZY LOGIC and INTELLIGE Vol.9 No.2
This paper proposes an architecture of a real-time EtherCAT master library called RtEML. The controls EtherCAT slaves under EtherCAT protocol in real-time. It provides a simple programming interface which is useful in developing robot application in C/C++ or C#. To achieve deterministic, hard real-time control in Microsoft Windows environment without additional hardware, INtime is used. Since INtime is designed specifically to take advantage of the powerful capabilities of the x86 processor architecture, the proposed RtEML achieves microseconds of real-time performance.
고속 이더넷 및 RT 미들웨어 기술을 이용한 친환경 스마트 가전 기기의 통합에 관한 연구
문용선(Yongsun Moon),트롱루안(Vo Trong Tuan Anh),이영필(Young-Pil),박종규(Jong Kyu Park),배영철(YoungChul Bae) 한국지능시스템학회 2009 한국지능시스템학회 학술발표 논문집 Vol.19 No.2
본 논문에서는 하드웨어 통합 기술과 소프트웨어 통합 기술을 적용한 친환경 스마트 가전 기기들을 효과적으로 통합하고 운용하는 기술 방법에 대하여 제시한다. 하드웨어 통합 기술은 고속의 이더넷 네트워크 기술을 이용하였으며, 소프트웨어 통합기술은 RT 미들웨어를 이용한다.
Thanh Nguyen Truong,Anh Tuan Vo,Hee-Jun Kang 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.6
In this paper, we design a neural network-based non-singular fast terminal sliding mode control (NFTSMC) for path tracking control of uncertain nonlinear systems (UNSs). The major features of the proposed control algorithm are to combine merits of feed-forward neural network (FFNN) and NFTSMC, such as approximation ability, rapid convergence rate, along with strong properties to external disturbances and uncertain dynamics. A controller is derived from the above combination for high control performance and fast convergence of state variables in presence of those unknown components. Besides, a fast-reaching control law (FRCL) is also applied to obtain a faster convergence time. The new contribution of the proposed method is to propose a PI-nonsingular fast terminal sliding mode surface (PI-NFTSMS) and to use a non-singular fast terminal sliding mode-based-error filter into FFNN. The contribution of the proposed method is a PI-NFTSMS and use of a non-singular fast terminal sliding mode-based-error filter into FFNN. With this approach, the lumped uncertain dynamics (LUDs) have been quickly and fully offset. Accordingly, the proposed controller can obtain a faster convergence time, higher tracking accuracy, lesser chattering than classical NFTSMC, and avoid the glitch of state variables in reaching the sliding manifold. Consequently, the stabilization of the whole closed loop control system is then guaranteed with strong control performance. The correctness of the stability is also proven based on Lyapunov analysis. Control performance obtained from the simulation example for an uncertain 3-DOF robot and experiment for an uncertain magnetic levitation system (MLS) has verified the effectiveness and practicality of the method.