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Ilton Pereira De ,oliveira - One of the best experts on this subject based on the ideXlab platform.
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Projeto de um kit ARM para simulação de um CLP residencial de baixo custo com placa de expansão de relês sem fio
2016Co-Authors: Ilton Pereira De ,oliveiraAbstract:O objetivo deste trabalho é projetar um sistema embarcado baseado em um microcontrolador da família ARM, com o objetivo de simular um CLP (Controlador Lógico Programável) para aplicação em automação residencial, levando em conta vários requisitos, seguindo normas de segurança brasileiras e internacionais, programação simples, usando uma ferramenta gratuita de desenvolvimento. Neste contexto, há uma grande variedade aplicações que podem ser desenvolvidas usando um CLP residencial, tais como, controle de iluminação, controle básico de equipamentos eletrônicos, climatização de ambientes, acionamento do movimentador de portão, irrigação de jardins, abertura de persianas, alarme de segurança por meio da leitura de sensores na casa, entre outros. A proposta deste trabalho é que o CLP residencial torne-se um projeto de código aberto, incluindo todos os códigos fontes, esquemáticos e manuais de usuário, disponibilizando-os em uma página web disponível para receber modificações para novas aplicações. O sistema embarcado desenvolvido é baseado em um ARM CORTEX M3 LPC1768, incluindo também uma porta Ethernet e interfaces CAN, RS232, RS485, USBe e XBee. O sistema também conta com um RTC (relógio em tempo real), memoria interna de 512k, assim como memórias externas do tipo SD-card e EPROM. Além disso, foi desenvolvido um módulo de expansão para controle de cargas, que pode ser controlado a partir da placa-mãe usando tanto conexão XBee quanto via cabo serial. Este módulo é composto de 8 relés que oferecem conexões opto-isoladas que são dirigidas para as tarefas de automação residencial. Adicionalmente, o sistema desenvolvido foi projetado para ser aplicado em cursos de graduação com foco em disciplinas voltadas para microcontroladores e sistemas embarcados para automação e controle. Neste trabalho o quesito de interface, implícito nos CLPs comerciais, envolvendo linguagens de programação tais como Ladder (Logic Diagram Programming), FBD (Function Block Diagram), LD (Ladder Diagram), ST (Structured Text), SFC (Sequential Function Chart), entre outros, é deixado como trabalho futuro. _______________________________________________________________________________________________ ABSTRACTThe purpose of this work is to design an ARM-based embedded system, addressed to achieve the simulation of a PLC (Programmable Logic Controller) for home automation; taking into account several requirements such as low-cost, international safety standards, following the Brazilian rules, and offering simple programming by using a free tool development. In this context, there are a wide variety of applications that can be developed using a residential PLC, such as lighting control, basic control electronic equipment, air conditioning environments, gate mover driver, irrigation of gardens, opening blinds, security alarm by reading sensors in the home, among others. The purpose of this work is that the proposed residential CLP becomes an open source design, including all software files, data-sheets and user manuals, making available them on an online site, and thus available for receiving modifications for new applications. The developed embedded system is based on an ARM-3 (16-68C), and includes also an Ethernet port, as well as CAN, RS232, RS485, USB, and XBee interfaces. Additionally, the system also has a real time clock, as well as internal 512K memory and SD-card and EPROM external memories. Additionally, a daughter board has been also developed which can be accessed from the mother board using both XBee connection and via parallel cable. This daughter board is composed of 8 relays offering opto-isolated connections which are addressed for home automation tasks. Finally, the developed system has been designed to be applied in undergraduate courses focused in microcontroller application, and automation and control lectures. In this work the interface issue, implicit in commercial PLCs, involving programming languages such as Ladder (Logic Diagram Programming), FBD (Function Block Diagram), LD (Ladder Diagram), ST (Structured Text), SFC (Sequential Function Chart) among others, it is proposed as a future work
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Projeto de um kit ARM para simulação de um CLP residencial de baixo custo com placa de expansão de relês sem fio
'Biblioteca Central da UNB', 2014Co-Authors: Ilton Pereira De ,oliveiraAbstract:Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Mecânica, 2014.O objetivo deste trabalho é projetar um sistema embarcado baseado em um microcontrolador da família ARM, com o objetivo de simular um CLP (Controlador Lógico Programável) para aplicação em automação residencial, levando em conta vários requisitos, seguindo normas de segurança brasileiras e internacionais, programação simples, usando uma ferramenta gratuita de desenvolvimento. Neste contexto, há uma grande variedade aplicações que podem ser desenvolvidas usando um CLP residencial, tais como, controle de iluminação, controle básico de equipamentos eletrônicos, climatização de ambientes, acionamento do movimentador de portão, irrigação de jardins, abertura de persianas, alarme de segurança por meio da leitura de sensores na casa, entre outros. A proposta deste trabalho é que o CLP residencial torne-se um projeto de código aberto, incluindo todos os códigos fontes, esquemáticos e manuais de usuário, disponibilizando-os em uma página web disponível para receber modificações para novas aplicações. O sistema embarcado desenvolvido é baseado em um ARM CORTEX M3 LPC1768, incluindo também uma porta Ethernet e interfaces CAN, RS232, RS485, USBe e XBee. O sistema também conta com um RTC (relógio em tempo real), memoria interna de 512k, assim como memórias externas do tipo SD-card e EPROM. Além disso, foi desenvolvido um módulo de expansão para controle de cargas, que pode ser controlado a partir da placa-mãe usando tanto conexão XBee quanto via cabo serial. Este módulo é composto de 8 relés que oferecem conexões opto-isoladas que são dirigidas para as tarefas de automação residencial. Adicionalmente, o sistema desenvolvido foi projetado para ser aplicado em cursos de graduação com foco em disciplinas voltadas para microcontroladores e sistemas embarcados para automação e controle. Neste trabalho o quesito de interface, implícito nos CLPs comerciais, envolvendo linguagens de programação tais como Ladder (Logic Diagram Programming), FBD (Function Block Diagram), LD (Ladder Diagram), ST (Structured Text), SFC (Sequential Function Chart), entre outros, é deixado como trabalho futuro.The purpose of this work is to design an ARM-based embedded system, addressed to achieve the simulation of a PLC (Programmable Logic Controller) for home automation; taking into account several requirements such as low-cost, international safety standards, following the Brazilian rules, and offering simple programming by using a free tool development. In this context, there are a wide variety of applications that can be developed using a residential PLC, such as lighting control, basic control electronic equipment, air conditioning environments, gate mover driver, irrigation of gardens, opening blinds, security alarm by reading sensors in the home, among others. The purpose of this work is that the proposed residential CLP becomes an open source design, including all software files, data-sheets and user manuals, making available them on an online site, and thus available for receiving modifications for new applications. The developed embedded system is based on an ARM-3 (16-68C), and includes also an Ethernet port, as well as CAN, RS232, RS485, USB, and XBee interfaces. Additionally, the system also has a real time clock, as well as internal 512K memory and SD-card and EPROM external memories. Additionally, a daughter board has been also developed which can be accessed from the mother board using both XBee connection and via parallel cable. This daughter board is composed of 8 relays offering opto-isolated connections which are addressed for home automation tasks. Finally, the developed system has been designed to be applied in undergraduate courses focused in microcontroller application, and automation and control lectures. In this work the interface issue, implicit in commercial PLCs, involving programming languages such as Ladder (Logic Diagram Programming), FBD (Function Block Diagram), LD (Ladder Diagram), ST (Structured Text), SFC (Sequential Function Chart) among others, it is proposed as a future work
Enrico Zio - One of the best experts on this subject based on the ideXlab platform.
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analysis of the robustness and recovery of critical infrastructures by goal tree success tree dynamic master Logic Diagram within a multistate system of systems framework in the presence of epistemic uncertainty
ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems Part B: Mechanical Engineering, 2015Co-Authors: Elisa Ferrario, Nicola Pedroni, Enrico ZioAbstract:In this paper, we evaluate the robustness and recovery of connected critical infrastructures (CIs) under a system-of-systems (SoS) framework taking into account: (1) the dependencies among the components of an individual CI and the interdependencies among different CIs; (2) the variability in component performance, by a multistate model; and (3) the epistemic uncertainty in the probabilities of transitions between different components states and in the mean values of the holding-times distributions, by means of intervals. We adopt the goal tree success tree–dynamic master Logic Diagram (GTST–DMLD) for system modeling and perform the quantitative assessment by Monte Carlo simulation. We illustrate the approach by way of a simplified case study consisting of two interdependent infrastructures (electric power system and gas network) and a supervisory control and data acquisition (SCADA) system connected to the gas network. This article is available in the ASME Digital Collection at http://dx.doi.org/10.1115/...
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goal tree success tree dynamic master Logic Diagram and monte carlo simulation for the safety and resilience assessment of a multistate system of systems
Engineering Structures, 2014Co-Authors: Elisa Ferrario, Enrico ZioAbstract:Abstract We extend a system-of-systems framework previously proposed by the authors to evaluate the safety and physical resilience of a critical plant exposed to risk of external events. The extension is based on a multistate representation of the different degrees of damage of the individual components and the different degrees of safety of the critical plant. We resort to a hierarchical model representation by Goal Tree Success Tree–Dynamic Master Logic Diagram (GTST–DMLD), adapting it to the framework of analysis proposed. We perform the quantitative evaluation of the model by Monte Carlo simulation. To the best of the author’s knowledge this is the first time that a multistate framework of combined safety and resilience analysis relating the structural and functional behaviour of the components to the system function in a GTST–DMLD Logic modelling of a system of systems is adopted in Seismic Probabilistic Risk Assessment. To illustrate the approach, we adopt a case study that considers the impacts produced by an earthquake and its aftershocks (the external events) on a nuclear power plant (the critical plant) embedded in the connected power and water distribution, and transportation networks which support its operation.
Wei Han - One of the best experts on this subject based on the ideXlab platform.
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analysis of 2 28 keeper chemical industries hazardous chemical explosion accident based on fta and hfacs
International Journal of Environmental Research and Public Health, 2018Co-Authors: Wei Jiang, Wei HanAbstract:On 28 February 2012, a guanidine nitrate explosion occurred at HEBEI KEEPER Chemical Industries Co., Ltd., China, resulting in 25 deaths, with 4 missing individuals and 46 injured. In order to explore the causal relationship hidden behind this accident, fault tree analysis (FTA) and the Human Factors Analysis and Classification System (HFACS) were used to systematically analyze the incident. Firstly, FTA was used to analyze the causes of the accident in depth, until all the basic causal events causing the guanidine nitrate explosion were identified, and a fault tree Diagram of the guanidine nitrate explosion was drawn. Secondly, for the unsafe acts in the basic causal events, the HFACS model was used to analyze the three levels of factors that lead to unsafe acts, including the preconditions for unsafe acts, unsafe supervision, and organizational influences. Finally, based on the analysis results of FTA and HFACS, a complete Logic Diagram of the causes of the accident was obtained. The FTA and HFACS accident analysis methods allowed for the identification of human factors and the accident evolution process in the explosion accident and provide a reference for accident investigation.
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Analysis of “2·28” KEEPER Chemical Industries Hazardous Chemical Explosion Accident Based on FTA and HFACS
MDPI AG, 2018Co-Authors: Wei Jiang, Wei HanAbstract:On 28 February 2012, a guanidine nitrate explosion occurred at HEBEI KEEPER Chemical Industries Co., Ltd., China, resulting in 25 deaths, with 4 missing individuals and 46 injured. In order to explore the causal relationship hidden behind this accident, fault tree analysis (FTA) and the Human Factors Analysis and Classification System (HFACS) were used to systematically analyze the incident. Firstly, FTA was used to analyze the causes of the accident in depth, until all the basic causal events causing the guanidine nitrate explosion were identified, and a fault tree Diagram of the guanidine nitrate explosion was drawn. Secondly, for the unsafe acts in the basic causal events, the HFACS model was used to analyze the three levels of factors that lead to unsafe acts, including the preconditions for unsafe acts, unsafe supervision, and organizational influences. Finally, based on the analysis results of FTA and HFACS, a complete Logic Diagram of the causes of the accident was obtained. The FTA and HFACS accident analysis methods allowed for the identification of human factors and the accident evolution process in the explosion accident and provide a reference for accident investigation
Wei Jiang - One of the best experts on this subject based on the ideXlab platform.
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analysis of 2 28 keeper chemical industries hazardous chemical explosion accident based on fta and hfacs
International Journal of Environmental Research and Public Health, 2018Co-Authors: Wei Jiang, Wei HanAbstract:On 28 February 2012, a guanidine nitrate explosion occurred at HEBEI KEEPER Chemical Industries Co., Ltd., China, resulting in 25 deaths, with 4 missing individuals and 46 injured. In order to explore the causal relationship hidden behind this accident, fault tree analysis (FTA) and the Human Factors Analysis and Classification System (HFACS) were used to systematically analyze the incident. Firstly, FTA was used to analyze the causes of the accident in depth, until all the basic causal events causing the guanidine nitrate explosion were identified, and a fault tree Diagram of the guanidine nitrate explosion was drawn. Secondly, for the unsafe acts in the basic causal events, the HFACS model was used to analyze the three levels of factors that lead to unsafe acts, including the preconditions for unsafe acts, unsafe supervision, and organizational influences. Finally, based on the analysis results of FTA and HFACS, a complete Logic Diagram of the causes of the accident was obtained. The FTA and HFACS accident analysis methods allowed for the identification of human factors and the accident evolution process in the explosion accident and provide a reference for accident investigation.
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Analysis of “2·28” KEEPER Chemical Industries Hazardous Chemical Explosion Accident Based on FTA and HFACS
MDPI AG, 2018Co-Authors: Wei Jiang, Wei HanAbstract:On 28 February 2012, a guanidine nitrate explosion occurred at HEBEI KEEPER Chemical Industries Co., Ltd., China, resulting in 25 deaths, with 4 missing individuals and 46 injured. In order to explore the causal relationship hidden behind this accident, fault tree analysis (FTA) and the Human Factors Analysis and Classification System (HFACS) were used to systematically analyze the incident. Firstly, FTA was used to analyze the causes of the accident in depth, until all the basic causal events causing the guanidine nitrate explosion were identified, and a fault tree Diagram of the guanidine nitrate explosion was drawn. Secondly, for the unsafe acts in the basic causal events, the HFACS model was used to analyze the three levels of factors that lead to unsafe acts, including the preconditions for unsafe acts, unsafe supervision, and organizational influences. Finally, based on the analysis results of FTA and HFACS, a complete Logic Diagram of the causes of the accident was obtained. The FTA and HFACS accident analysis methods allowed for the identification of human factors and the accident evolution process in the explosion accident and provide a reference for accident investigation
Elisa Ferrario - One of the best experts on this subject based on the ideXlab platform.
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analysis of the robustness and recovery of critical infrastructures by goal tree success tree dynamic master Logic Diagram within a multistate system of systems framework in the presence of epistemic uncertainty
ASCE-ASME Journal of Risk and Uncertainty in Engineering Systems Part B: Mechanical Engineering, 2015Co-Authors: Elisa Ferrario, Nicola Pedroni, Enrico ZioAbstract:In this paper, we evaluate the robustness and recovery of connected critical infrastructures (CIs) under a system-of-systems (SoS) framework taking into account: (1) the dependencies among the components of an individual CI and the interdependencies among different CIs; (2) the variability in component performance, by a multistate model; and (3) the epistemic uncertainty in the probabilities of transitions between different components states and in the mean values of the holding-times distributions, by means of intervals. We adopt the goal tree success tree–dynamic master Logic Diagram (GTST–DMLD) for system modeling and perform the quantitative assessment by Monte Carlo simulation. We illustrate the approach by way of a simplified case study consisting of two interdependent infrastructures (electric power system and gas network) and a supervisory control and data acquisition (SCADA) system connected to the gas network. This article is available in the ASME Digital Collection at http://dx.doi.org/10.1115/...
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goal tree success tree dynamic master Logic Diagram and monte carlo simulation for the safety and resilience assessment of a multistate system of systems
Engineering Structures, 2014Co-Authors: Elisa Ferrario, Enrico ZioAbstract:Abstract We extend a system-of-systems framework previously proposed by the authors to evaluate the safety and physical resilience of a critical plant exposed to risk of external events. The extension is based on a multistate representation of the different degrees of damage of the individual components and the different degrees of safety of the critical plant. We resort to a hierarchical model representation by Goal Tree Success Tree–Dynamic Master Logic Diagram (GTST–DMLD), adapting it to the framework of analysis proposed. We perform the quantitative evaluation of the model by Monte Carlo simulation. To the best of the author’s knowledge this is the first time that a multistate framework of combined safety and resilience analysis relating the structural and functional behaviour of the components to the system function in a GTST–DMLD Logic modelling of a system of systems is adopted in Seismic Probabilistic Risk Assessment. To illustrate the approach, we adopt a case study that considers the impacts produced by an earthquake and its aftershocks (the external events) on a nuclear power plant (the critical plant) embedded in the connected power and water distribution, and transportation networks which support its operation.
