检索结果-内蒙古大学图书馆

Heuristic-Based Recommendation System for Dealing with Abnormal Situations in Industrial Applications

ASCE-ASME Journal of Risk and Uncertainty in engineering Systems, Part B: Mechanical engineering 2025年第2期11卷 021104页

作者： Da Silva, Márcio J. Pereira, Carlos E. PPGEE-Graduate Program on Electrical Engineering Federal University of Rio Grande Do sul RS Porto Alegre90035190 Brazil

The effective management of process deviations and abnormal events depends on operational actions in providing the appropriate responses to each situation. Applications with requirements focused on the provision of resources tend to be handled by a human-machine interface (HMI) along with supervisory control and data acquisition (SCADA). Process reliability is achieved if the operation ensures that actions will be performed according to the required response and priority levels. This paper presents a novel architecture entitled the heuristic-based recommendation system (HB-RS). The main goal is to provide resources capable of streamlining the process of actively handling abnormal situations. For recommendation purposes, the use of probabilistic networks is proposed, which are well suited to represent uncertainty elements present in engineering applications. To create the inference mechanism for these systems, a multi-entity Bayesian network (MEBN) is proposed, highlighting the importance of semantic characterization via knowledge-based, probabilistic graphical model formalism, which is closely linked to the modeling paradigm in which we can predict situations. The developed capabilities have been applied to a real case study in the operation of a metro train system, and the results obtained indicate the value of the proposed method. Copyright © 2025 by ASME.

关键词： Subway cars

来源：评论

学校读者我要写书评

暂无评论

Low-Cost FPGA-Based Digital-to-Time Converter

Low-Cost FPGA-Based Digital-to-Time Converter

引用

IEEE Latin American Symposium on Circuits and Systems (LASCAS)

作者： Vilmondes Ribeiro Silva Dalton Martini Colombo Tomás Perpetuo Corrêa Graduate Program in Electrical Engineering (PPGEE) Federal University of Minas Gerais (UFMG) Brazil

ISBN: (数字)9798331522124

ISBN: (纸本)9798331522131

In this paper, we present a Digital-to-Time Converter (DTC) based on a low-cost FPGA platform, utilizing the Vernier with oscillators architecture. A DTC is a circuit that converts digital information into a very accurate time output. The proposed Vernier DTC is implemented on an Altera Cyclone III FPGA chip and features tunable resolution through the periodic relationships between two PLL-generated signals. The linearity of the system was measured for a resolution of 990 ps, showing DNL and INL values of −0.41 to +0.54 and −0.82 to +0.17, respectively. It has a range of 99 ns and an estimated power consumption of 89 mW. Furthermore, measurements demonstrate that the system achieves a maximum resolution of 12.5 ps, utilizing only 2% of the FPGA resources.

关键词： Semiconductor device measurement Power demand Linearity Timing Resource management IP networks Phase locked loops Signal resolution Field programmable gate arrays Oscillators

来源：评论

学校读者我要写书评

暂无评论

Reliability analysis of a 130nm charge redistribution SAR ADC under single event effects 14

Reliability analysis of a 130nm charge redistribution SAR AD...

引用

27th Symposium on Integrated Circuits and Systems Design, SBCCI 2014

作者： Lanot, A.J.C. Balen, T.R. Universidade Federal Do Rio Grande Do sul Department of Electrical Engineering - DELET Graduate Program in Electrical Engineering - PPGEE Brazil

ISBN: (纸本)9781479968732

Successive Approximation Register (SAR) converters based on charge redistribution are often present in embedded mixed-signal systems. Previous works have shown that this topology is prone to errors on the conversion, caused by Single Event Transients (SET), when exposed to ionizing radiation. Such errors can propagate to the subsequent steps of conversion, leading to multiple bit errors on the converted data. In this work, the effects of SETs on the analog switches and on the digital control logic of a charge redistribution SAR A/D converter are analyzed. A fault injection framework was developed in a way that faults are randomly injected, by means of spice simulations, considering a 130nm CMOS technology. This way, the behavior of the converter under single event effects can be predicted, and the most vulnerable circuit nodes can be identified. © 2014 IEEE.

关键词： Errors

来源：评论

学校读者我要写书评

暂无评论

Improved multiobjective particle swarm optimization for designing PID controllers applied to robotic manipulator 4

Improved multiobjective particle swarm optimization for desi...

引用

4th IEEE Symposium on Computational Intelligence in Control and Automation, CICA 2014

作者： Pierezan, Juliano Ayala, Helon H. V. Da Cruz, Luciano F. Freire, Roberto Z. Dos S. Coelho, Leandro Federal University of Parana- UFPR Electrical Engineering Graduate Program - PPGEE Curitiba Brazil Pontifical Catholic University of Parana - PUCPR Industrial and Systems Engineering Graduate Program - PPGEPS Curitiba Brazil Federal University of Parana - UFPR Department of Electrical Engineering - DEE/PPGEE Curitiba Brazil

ISBN: (纸本)9781479945313

In order to improve equipment efficiency in terms of performance, energy consumption and degradation for example, the industry has increased the use of control systems as the PID (proportional-integral-derivative) to a new baseline. This structure has few parameters to adjust and it is easy to implement practically. However, there are some requirements often included on multivariable systems that cannot be solved concurrently by classical methods. To solve this problem, the current paper approaches the application of Multiobjective Differential Evolution (MODE), Multiobjective Harmony Search (MOHS) and Multiobjective Particle Swarm Optimization (MOPSO) on multivariable PID controllers tuning. Moreover, an improved version of MOPSO (I-MOPSO) is proposed and its performance is compared with the other algorithms. In order to validate it under control systems, the optimization technique is applied on a two degree of freedom robotic manipulator. Finally, a detailed analysis is made on the I-MOPSO achievements. © 2014 IEEE.

关键词： Three term control systems

来源：评论

学校读者我要写书评

暂无评论

System identification of a pilot scale heat exchanger: A state-space realization approach 42

System identification of a pilot scale heat exchanger: A sta...

引用

42nd Conference of the Industrial Electronics Society, IECON 2016

作者： Lima, Rafael B. C. Barros, Péricles R. Acioli, George Post-graduate Program in Electrical Engineering PPgEE COPELE UFCG Brazil Electrical Engineering Department Fed. University of Campina Grande Brazil

It is presented a state-space realization approach for identification of a pilot scale heat exchanger plant. The proposed methodology is a computational efficient way to estimate state-space models from experimental d...

ISBN: (纸本)9781509034741

关键词：

来源：评论

学校读者我要写书评

暂无评论

Single-Phase Six-Switch Universal Active Power Filter 10

Single-Phase Six-Switch Universal Active Power Filter

引用

10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018

作者： Rodrigues, Phelipe L.S. Jacobina, Cursino B. Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Brazil Campina Grande Paraíba58429-900 Brazil

ISBN: (纸本)9781479973118

In this paper, three structures were developed and analyzed, these configurations are based on three-leg ac/dc/ac converters operating as a universal active power filter (UAPF) also known as unified power quality conditioner (UPQC). The proposed configurations are appropriate for a voltage sag/swell compensation, reactive power compensation, reducing losses and switches, as well as for applications where the input voltage is twice the output voltage, for example, applications in systems in Brazil where the voltages vary between 220 V (rms) and 110 V (rms) from one state to another. The proposed six-switch single-phase UAPF are compared with the conventional three-leg and four-leg single-phase UAPF solutions. The pulsewidth modulation (PWM) and control techniques are developed and presented. For validation purposes, the simulation and experimental results for proposed configurations are shown. © 2018 IEEE.

关键词： Pulse width modulation

来源：评论

学校读者我要写书评

暂无评论

An ontology-driven framework to support scenario representation in a 3D operator training simulator 4

An ontology-driven framework to support scenario representat...

引用

4th International Conference on Simulation and Modeling Methodologies, Technologies and Applications, SIMULTECH 2014

作者： Filho, Flávio Torres de Fátima Queiroz Vieira, Maria Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Campina Grande Brazil Department of Electrical Engineering Federal University of Campina Grande Campina Grande Brazil

ISBN: (纸本)9789897580383

This paper presents a framework to support the development of three-dimensional virtual scenarios for an operator training simulator for electrical systems. Given the need to represent a variety of scenarios of interest, this can be an effort and time consuming task. The proposed framework promotes a systematic approach when building scenarios and is supported by tools from the ontology-based domain. An editing tool is also under construction. As it will be discussed in the paper, this approach resulted in the simplification of the scenario building process which is achieved by interchanging descriptions at different levels of abstraction. The descriptions concern the situation to be represented;plant objects' representation, both visual and behavioural, the latter represented as Coloured Petri Nets (CPN) models. © 2014 SciTePress. All rights reserved.

关键词： Ontology

来源：评论

学校读者我要写书评

暂无评论

Three-Leg Single-Phase Universal Active Power Filter 10

Three-Leg Single-Phase Universal Active Power Filter

引用

10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018

作者： Rodrigues, Phelipe L. S. Jacobina, Cursino B. PPgEE COPELE Post-Graduate Program in Electrical Engineering Brazil Campina Grande Paraíba58429-900 Brazil

ISBN: (纸本)9781479973118

This paper presents a topology based on three-leg ac-dc-ac converters for active power filter (APF) applications. The proposed configuration is appropriate for voltage sag/swell compensation, reactive power compensation, and for reducing losses and the number of switches. The proposed three-leg single-phase universal active power filter (UAPF) is compared with conventional four-leg and three-leg single-phase UAPF solutions. Pulsewidth modulation (PWM) and control techniques are developed and presented. For validation purposes, simulation and experimental results of proposed configurations are shown. © 2018 IEEE.

关键词： Pulse width modulation

来源：评论

学校读者我要写书评

暂无评论

Measurement equipment for characterization of ferromagnetic materials

Measurement equipment for characterization of ferromagnetic ...

引用

2015 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2015

作者： Moraes, Tarcisio Oliveira De Freire, Raimundo Carlos Silverio Vieira, Debora Albuquerque Souza, Cleonilson Protasio De Post-Graduate Program in Electrical Engineering - PPGEE COPELE Federal University of Campina Grande UFCG Campina Grande Brazil Federal University of Campina Grande UFCG Campina Grande Brazil Post-Graduate Program in Electrical Engineering - PPGEE/UFPB Department of Electrical Engineering Federal University of Paraíba UFPB João Pessoa Brazil

ISBN: (纸本)9781479961139

Ferromagnetic materials have magnetic properties which determine its magnetic field conductivity characteristics. Such characteristics are extremely important for the proper selection and use of these materials in measurement processes, for example. Therefore, this paper presents an equipment for the characterization of ferromagnetic materials constructed in a laboratory. The experimental results of this equipment are acquired and compared with the experimental results obtained with an industrially manufactured apparatus called hysteresisgraph, designed to provide magnetic characterization of magnetic materials. The results of the comparison demonstrate that the equipment presented has low relative error and can be applied in academic projects which require magnetic characterization of ferromagnetic materials developed in the laboratory. © 2015 IEEE.

关键词： Ferromagnetic materials

来源：评论

学校读者我要写书评

暂无评论

Two-phase open-end winding induction motor drive using improved current source inverter 9

Two-phase open-end winding induction motor drive using impro...

引用

9th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2017

作者： De Costa, Louelson A.L.A.C. Vitorino, Montiê A. Braga-Filho, Edgar R. Corrêa, Maurício B.R. Fernandes, Darlan A. Post-Graduate Program in Electrical Engineering - PPgEE - COPELE Brazil Campina Grande - PB Brazil Joao Pessoa - PB Brazil

ISBN: (数字)9781509029983

ISBN: (纸本)9781509029983

In this work it is presented a two-phase open-end winding induction motor (IM) driven by an improved current source inverter (CSI). The proposed inverter has independent full quadrant operation, lower DC-link current value, high magnetics power density, 25% more efficient and high AC output voltage waveform quality compared to conventional CSI solutions. A back-to-back AC-DC-AC current source converter is used to drive the two-phase open-end winding IM, where in the AC-DC portion it is used a conventional three-phase three-leg rectifier, and the proposed two-phase inverter is used in the DC-AC portion. The two-phase IM model is also presented. Two motor drive methods for the improved CSI are used: Volts/Hertz and modified q-axis indirect flux oriented control. Simulation and experimental results are provided in order to validate the theoretical approach. © 2017 IEEE.

关键词： Induction motors

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：