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Dissertations / Theses on the topic 'Safety of machinery'
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Kivistö-Rahnasto, Jouni. "Machine safety design : an approach fulfilling European safety requirements /." Espoo [Finland] : Technical Research Centre of Finland, 2000. http://www.vtt.fi/inf/pdf/publications/2000/P411.pdf.
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Määttä, Timo. "Virtual environments in machinery safety analysis /." Espoo [Finland] : VTT Technical Research Centre of Finland, 2003. http://www.vtt.fi/inf/pdf/publications/2003/P516.pdf.
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Diss. -- Tampereen teknillinen yliopisto. Thesis (doctoral)--Tampere University of Technology, 2004.Includes bibliographical references (p. 153-170). Myös verkkojulkaisuna. Also available on the World Wide Web.
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Johansson, Alicia. "Maskinsäkerhetsstandarder och lönsamhet : Profitability of standardisation and safety of machinery." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Maskinteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-21392.
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The composing of new standards in the area of machinery safety is a continuous work which aims at writing standards that works as a tool for companies and enables them to control if the fundamental demands of security and health which is prescribed by law are reached. It is optional for the companies to choose if they want to use the standards. This report is written in cooperation with SIS and the study were performed within the technical committee SIS/TK 282. The report aims to investigating if the companies that choose to use standards see any economic advantages due to this work, how these advantages take form and where they originate. The main question formulation is how the profitability among companies that have adjusted their production to machinery safety standards are affected. The study was performed with an initial literature study which aimed at obtaining knowledge and an overview over the subject as well as investigate what former studies had resulted in. Thereafter a poll where executed among the participants in SIS/TK 282 and from this group an unit for observations were chosen for later interviews. Among the effects that were observed in the study it is worth to mention that standards contribute to harmonising laws in Europe and the work with composing standards therefore benefit the free market and possibilities for the companies to export their goods. Due to an increased focus on the international standards the work with composing new standards has become a global network. The companies that engage themselves in this work can contribute and affect in what direction the new standards are going and through this work they can benefit their own products. Through this they can gain an advantage over their rival companies. A systematic work with composing new standards also works as a tool to help companies to reach their goals in safety. Also standards can generate a decrease in absence due to illness and the risk that an accident occurs. The responsibilities among the personnel is increased and the standards connect personnel – managerial staff – prescriptions from the law which can create an increased comfort in the workplace. This in turn can create an increased quality of the products and better reliability of delivery. The use of standards can also help the company to detect the underlying reasons for problems in the production and through this reach less discontinues in the production and an increased accessibility to the machines. There emerged a number of factors in the study that indicates that it is profitable for a company to adopt to standards and to actively participate in the development of new standards.Utarbetandet av maskinsäkerhetsstandarder är ett pågående arbete där standarderna är avsedda att fungera som ett verktyg för företag för att kunna kontrollera om de lagstadgade, grundläggande säkerhets- och hälsokraven är uppfyllda. Det är dock frivilligt för företag att begagna sig av standarder som verktyg. Denna rapport är skriven i samarbete med SIS och undersökningen utfördes inom den tekniska kommitteen SIS/TK 282. Rapporten syftar till att undersöka om de företag som väljer att använda sig av maskinsäkerhetsstandarder ser några ekonomiska fördelar med detta arbete, vad i dessa i så fall består samt de bakomliggande orsakerna till att de kan uppkomma. Huvudfrågeställningen för rapporten är att se om lönsamheten påverkas hos företag som anpassat sin tillverkning för att uppnå maskinsäkerhetsstandarderna? Undersökningen genomfördes genom en inledande litteraturstudie med syftet att införskaffa kunskap och orientering inom ämnet samt att undersöka vad tidigare studier inom ämnet resulterat i. Därefter genomfördes en enkätundersökning inom SIS/TK 282 och ur denna grupp valdes en observationsenhet ut för efterföljande intervjuer. Bland de effekter som framkom av intervjuerna kan nämnas att standarder bidrar till en gemensam lagstadga inom Europa och standardiseringsarbetet gynnar därmed den fria marknaden och exportmöjligheterna. Genom ett ökat fokus på internationella standarderna har standardiseringsarbetet övergått till ett globalt nätverk. Företag som engagerar sig i standardiseringsarbete kan vara med och påverka i vilken riktning standarderna utvecklas och genom detta gynna de egna produkterna. Därmed skapas en konkurrensfördel hos de företag som aktivt engagerar sig i standardiseringsarbetet. Ett systematiskt arbete med standarder fungerar även som ett verktyg för att hjälpa företag att nå uppsatta mål för säkerheten och standarder kan generera en minskad sjukfrånvaro och minskade olycksrisker. Personalansvaret ökar och standarderna ger en koppling mellan personal – ledning – lagkrav vilket kan alstra en ökad trivsel på arbetsplatsen. Detta i sin tur kan ge en förbättrad produktkvalitet samt en förbättrad leveranstillförlitlighet. Dessutom kan efterlevnaden av standarder inom verksamheten lyfta fram de underliggande orsakerna till problem inom produktionen och kan därmed leda till mindre produktionsstopp och en ökad tillgänglighet till maskinerna. Det framkom ett antal faktorer i undersökningen som pekar på att det är lönsamt för företag att anamma standarder och aktivt delta i utvecklingen av nya standarder.
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Reedman, Adam Victor Creyke. "The design and control of a manipulator for safety-critical deployment applications." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/33736.
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Development of manipulators that interact closely with humans has been a focus of research in fields such as robot-assisted surgery The recent introduction of powered surgical-assistant devices into the operating theatre has meant that modified industrial robot manipulators have been required to interact with both patient and surgeon Some of these robots require the surgeon to grasp the end-effector and apply a force while the joint actuators provide resistance to motion In the operating theatre, the use of high-powered mechanisms to perform these tasks could compromise the safety of the patient, surgeon and operating room staff. In this investigation, a two degrees-of-freedom (2-DoF) manipulator is designed for the purpose of following a pre-defined path under the direct control of the surgeon.
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Lautner, Erik, and Daniel Körner. "An integrated System Development Approach for Mobile Machinery in consistence with Functional Safety Requirements." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-200666.
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The article identifies the challenges during the system and specifically the software development process for safety critical electro-hydraulic control systems by using the example of the hydrostatic driveline with a four speed transmission of a feeder mixer. An optimized development approach for mobile machinery has to fulfill all the requirements according to the Machinery Directive 2006/42/EC, considering functional safety, documentation and testing requirements from the beginning and throughout the entire machine life cycle. The functionality of the drive line control could be verified in advance of the availability of a prototype by using a “software-in-the-loop” development approach, based on a MATLAB/SIMULINK model of the drive line in connection with the embedded software.
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Zhang, Le-Le. "Increasing the road safety of e-bike : design of protective shells based on stability criteria." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/41253/.
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China currently occupies the world’s leading Electric bicycle (e-bike) market. However, the popularity of e-bikes is accompanied by massive numbers of injuries and deaths due to accidents involving e-bikes. As a result, the safety of e-bikes has recently received much attention from the public and the government and researchers have concentrated on improving the safety features of e-bikes with innovative technologies. It has been shown that well-designed protective shells can protect a driver involved in an e-bike accident. However, there is a lack of criteria on which to base the design of an effective protective shell for e-bikes. Therefore, this research focuses on the development of a design criterion based on the specific case of Roly-Poly stability. This stability criterion can be formulated for one curved surface as r > h, which is in a stable stability configuration - one of a number of static stability configurations. In this study, static stabilities are configured based on knowledge of potential energy (PE). In order to verify the design criteria, three types of protective shells are designed with different stability conditions. The first type follows the design criterion (r > h), while the remaining two do not (r = h and r < h). A finite element model of an e-bike is constructed with key components, such as the main frame, CoM (the position of which is obtained by a plumb line experiment), and the designed protective shells. The meshed models are produced and employed to determine the contact parameters using the frictionless penalty method. The corresponding results of sideways falling simulation successfully demonstrate the validity of the design criterion.
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Jepsen, Shelly Dee. "Assessment of the U.S. Department of Labor's Tractor and Machinery Certification Program." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1149104900.
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Kuhlhoff, Igor Ribeiro. "Method for application of weibull distribution to the reliability calculation of functional safety for industrial machinery." reponame:Repositório Institucional da UFSC, 2014. https://repositorio.ufsc.br/xmlui/handle/123456789/132745.
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Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia de Automação e Sistemas, Florianópolis, 2014.Made available in DSpace on 2015-05-12T04:03:06Z (GMT). No. of bitstreams: 1 333353.pdf: 5233518 bytes, checksum: 599b6c026148a94e45d4b00a33f14b78 (MD5) Previous issue date: 2014
O desenvolvimento de sistemas elétricos e eletrônicos permitiu a massificação do uso de dispositivos eletrônicos programáveis para comando e controle de operações de sistemas técnicos. Tais dispositivos possibilitaram o desenvolvimento de sistemas técnicos mais complexos, porém, devido a essa elevada complexidade, observou-se um aumento de acidentes causados por falhas inerentes ao controle de tais sistemas. Para se reduzir esses acidentes, foram criadas normas técnicas para sistemas de controle, cuja aplicação seja relevante a segurança, o que deu origem a segurança funcional. Segurança funcional refere-se à segurança que é mantida atráves do correto funcionamento de um sistema técnico. Diferentes segmentos industriais tem aplicado o conceito de segurança funcional, para criar máquinas e sistemas mais seguros. No setor de construção de máquinas, o uso de funções de segurança reduz o número de acidentes de trabalho, ao evitar que operadores, mantenedores e pessoas ao redor fiquem expostas aos perigos inerente das máquinas. As normas técnicos impõe requisitos quantitativos e qualitativos sobre os sistemas de controle de segurança. A norma técnica internacional IEC 61508 definiu um framework para quantificação de segurança funcional. Para cada setor industrial, normas específicas foram baseadas baseadas na IEC 61508. Esse framework é bem adequado para componentes elétricos e eletrônicos. Porém, na área de maquinário industrial, sistemas de controle são realizados não somente com tais componentes, mas também por componentes mecânicos, pneumáticos e hidráulicos, os quais apresentam um comportamento diferente de falha. Tais componentes são considerados pela norma técnica internacional ISO 13849. No entanto, os métodos de quantificação desta norma contém fortes limitações e não são completamente compreendidos pelos usuários. Este trabalho dedica-se ao estudo da norma técnica internacional de segurança funcional no setor de construção de máquinas industriais, a ISO 13849. O foco do estudo é a quantificação de falhas físicas de componentes. Falhas físicas sao quantificadas através de indicadores probabilísticos, sendo objeto de estudo da engenharia de confiabilidade. No primeiro capítulo, desenvolve-se o conceito de segurança funcional. O conceito é explorado como um todo, como uma ferramenta de redução de riscos, e posteriormente como esse conceito é aplicado no setor de construção de máquinas. O apêndice A complementa o capítulo 1 com a estrutura legal no que diz respeito à segurança de máquinas na Europa, definido pela Diretiva Europeia de Máquinas, da qual a norma técnica ISO 13849 faz parte. Ainda no capítulo 1 são identificadas as principais linhas de pesquisa, e o objetivo do trabalho é enunciado. Este trabalho, feito em parceria com a Bosch Rexroth, tem como objetivo o desenvolvimento de um método que possibilite a quatificação de índices de confiabilidade para segurança funcional utilizando distribuição de Weibull. No segundo capítulo, conceitos básicos para a compreensão do trabalho são apresentados. Os primeiros conceitos relacionam-se com conceitos da engenharia de confiabilidade, com o objetivo de esclarecer conceitos como probabilidade, confiabilidade, probabilidade de falha e construir o conceito do índice utilizado pela ISO 13849, a frequência média de falhas perigosas por hora, PFH. O apêndice B complementa esse capítulo, com uma explicação intuitiva do que é medido através do PFH. Neste capítulo também é apresentada a distribuição de Weibull, bem como métodos de cálculo de PFH. Os parâmetros para cálculo do PFH segundo a ISO 13849 são apresentados e explicados. No terceiro capítulo é apresentado como se é calculado o PFH através de simulação a eventos discretos. Um método para cálculo do PFH considerando distribuição de Weibull, para estruturas simples e estruturas redundantes, correspondendo às categorias B, 1, 3 e 4 da norma técnica ISO 13849. O apêndices C desenvolve a equação para determinaão do número mínimo de simulações para se alcançar o resultado desejado, e o apêndice D desenvolve as equações utilizadas pelo método proposto para estruturas redundantes com falha de componentes seguindo a distribuição de Weibull. Os resultados para os casos de comparação com a ISO 13849 são apresentados no apêndice E. No quarto capítulo é apresentado um exemplo de aplicação do método proposto em uma máquina hidráulica simples do Laboratório de Sistemas Hidráulicos e Pneumáticos (LASHIP), da Universidade Federal de Santa Catarina (UFSC). A determinação do PFH e subsequentemente do PL é realizada através do procedimento dado pela norma e pelo método proposto. Utilizando-se o método proposto, foi possível calcular PFH para intervalos de utilização diferente do considerado pela ISO 13849, bem como reconhecer o efeito do desgaste do componente, caracterizado pela distribuição de Weibull. No quinto capítulo é apresentado uma visão geral de como integrar o cálculo de PFH com distribuição de Weibull com o processo de desenvolvimento de uma máquina, baseado em experiência com a Bosch Rexroth. No capítulo de conclusão é analisado o potencial de se realizar análises mais realistas, e as limitações do método proposto, sendo adequado apenas para máquinas o subsistemas produzidos em série, devido ao requerimento de dados de campo para extrair os parâmetros da distribuição de Weibull para cada componente. Analisa-se também como que a pesquisa desenvolvida se encaixa na linha de pesquisa explicitada no primeiro capítulo, e qual a relevância para o cenário brasileiro. Adicionalmente, sugestões para trabalhos futuros são feitas.
Abstract : The IEC 61508 standard series defined a framework for quantification of functional safety. For each particular industry sector, specific standards are being developed based on it. This framework is well suited for electrical and electronic components. However, in the field of machinery, control systems are realized not only by such components, but also by mechanical, pneumatic and hydraulic components, which exhibit a different failure behavior. Such components are considered by the ISO 13849 standard. However, quantification methods of this standard are still not quite well understood by the users, and have strong limitations. This work presents a study an alternative method of how to calculate the average frequency of dangerous failures (PFH), required by ISO 13849 in order to achieve a Performance Level (PL). This alternative method includes modeling safety functions as Reliability Block Diagram and evaluation of PFH using the software BlockSim, through Discrete Event Simulation. Modeling hypothesis and limitations are discussed. The proposed method enables calculation of the standard s cases, as well as consideration of different failure distributions, of which Weibull distribution is considered. A study case considering Weibull distributed failures is presented. Applicability of the method is also discussed.
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Wallace, Darrell Richard. "A comparative analysis of a conventional versus a computer-assisted technique for identification of mechanical power press hazards." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1141670152.
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Mosberger, Rafael. "Vision-based Human Detection from Mobile Machinery in Industrial Environments." Doctoral thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-48324.
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The problem addressed in this thesis is the detection, localisation and tracking of human workers from mobile industrial machinery using a customised vision system developed at Örebro University. Coined the RefleX Vision System, its hardware configuration and computer vision algorithms were specifically designed for real-world industrial scenarios where workers are required to wear protective high-visibility garments with retro-reflective markers. The demand for robust industry-purpose human sensing methods originates from the fact that many industrial environments represent work spaces that are shared between humans and mobile machinery. Typical examples of such environments include construction sites, surface and underground mines, storage yards and warehouses. Here, accidents involving mobile equipment and human workers frequently result in serious injuries and fatalities. Robust sensor-based detection of humans in the surrounding of mobile equipment is therefore an active research topic and represents a crucial requirement for safe vehicle operation and accident prevention in increasingly automated production sites. Addressing the described safety issue, this thesis presents a collection of papers which introduce, analyse and evaluate a novel vision-based method for detecting humans equipped with protective high-visibility garments in the neighbourhood of manned or unmanned industrial vehicles. The thesis provides a comprehensive discussion of the numerous aspects regarding the design of the hardware and the computer vision algorithms that constitute the vision system. An active nearinfrared camera setup that is customised for the robust perception of retroreflective markers builds the basis for the sensing method. Using its specific input, a set of computer vision and machine learning algorithms then perform extraction, analysis, classification and localisation of the observed reflective patterns, and eventually detection and tracking of workers with protective garments. Multiple real-world challenges, which existing methods frequently struggle to cope with, are discussed throughout the thesis, including varying ambient lighting conditions and human body pose variation. The presented work has been carried out with a strong focus on industrial applicability, and therefore includes an extensive experimental evaluation in a number of different real-world indoor and outdoor work environments.
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Unger, Holger, and Katja Wieland. "Bewertung von Altmaschinen nach BetrSichV." Universitätsbibliothek Chemnitz, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-230238.
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Für Alt- und Gebrauchtmaschinen gelten spezielle Regelungen für die sicherheitsgerechte Gestaltung. Nicht selten müssen derartige Maschinen Einzelfallprüfungen standhalten, um explizit die rechtlichen Gegebenheiten anwenden zu können. Zu beachten ist dabei, dass gemäß § 5 Abs. 3 BetrSichV nur solche Arbeitsmittel zur Verfügung gestellt und verwendet werden „die den für sie geltenden Rechtsvorschriften über Sicherheit und Gesundheitsschutz entsprechen.“ Maschinen die „für eigene Zwecke selbst hergestellt wurden, müssen den grundlegenden Sicherheitsanforderungen der anzuwendenden Gemeinschaftsrichtlinien entsprechen.“ Für Maschinen die "wesentlich verändert" wurden, muss ein entsprechendes Konformitätsbewertungsverfahren gemäß der Maschinenrichtlinie 2006/42/EG durchgeführt werden.
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Hrozek, Petr. "Posouzení bezpečnosti soustruhu S-28/750." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232171.
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This thesis solves the safety machinery. Here are listed and explained the most important concepts in the field of the safety machinery defined by standards ČSN EN 61508 and ČSN EN ISO 12100. Methods of risk assessment and risk reduction at the tolerated limit are also included. The practical part includes risk analysis and the design and implementation of security features specified lathe.
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Poul, Ondřej. "Analýza rizik kontejnerových nůžek řady CNS-K." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229923.
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This thesis deals with the safety of an enginery, namely with container shears of Žďas company in Žďár nad Sázavou. Initial familiarization with the machine was followed by the proposition of a relevant block diagram and the definition of the usage limits, in aim to analyse the risks related to the use of such an enginery
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Mank, Slavomír. "Analýza rizik a bezpečnosti u optické kontrolní stanice." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231056.
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This thesis discusses of safety of machinery from production of our company. It is an optical measuring station to check spin valve stroke of inlet valve of the high pressure fuel pump. It also deals with the analysis of the legislative situation in this field. After initially acquaintance, the block diagram creating and definition of the limits, was conducted risk analysis of machinery.
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Oktay, Gorkem. "Design And Simulation Of A Traction Control System For An Integrated Active Safety System For Road Vehicles." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/2/12610204/index.pdf.
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Active safety systems for road vehicles make a crucial preventive contribution to road safety. In recent years, technological developments and the increasing demand for road safety have resulted in the integration and cooperation of these individual active safety systems. Traction control system (TCS) is one of these individual systems, which is capable of inhibiting wheel-spin during acceleration of the vehicle on slippery surfaces.
In this thesis, design methodology and simulation results of a traction control system for four wheeled road vehicles are presented. The objective of the TCS controller is basically to improve directional stability, steer-ability and acceleration performance of vehicle by controlling the wheel slip during acceleration.
In this study, the designed traction control system based on fuzzy logic is composed of an engine torque controller and a slip controller. Reference wheel slip values were estimated from the longitudinal acceleration data of the vehicle. Engine torque controller determines the throttle opening angle corresponding to the desired wheel torque, which is determined by a slip controller to track the reference slip signals. The wheel torques delivered by the engine are compensated by brake torques according to the desired wheel torque determined by the slip controller. Performance of the TCS controller was analyzed through several simulations held in MATLAB/Simulink for different road conditions during straight line acceleration and combined acceleration and steering. For simulations, an 8 DOF nonlinear vehicle model with nonlinear tires and a 2 DOF nonlinear engine model were built.
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Weiserová, Gabriela. "Řízení rizik strojního zařízení." Master's thesis, Vysoké učení technické v Brně. Ústav soudního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402656.
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This thesis deals with the issue of risk management of SCIOX Box machinery. The theoretical part provides an introduction to the basic concepts and procedures in the area of risk management, whose implementation into practice then deals with the analytical part. In the analytical part, the risks of selected machinery are analyzed and evaluated in accordance with the ČSN EN ISO 12100: 2011 norm together with other relevant norms. In the final part there are suggestions and recommendations for making the risk management process more effective in the selected company, which is the manufacturer of machinery - ELEDUS s.r.o.
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Drlík, Michal. "Metodika vývoje a validace softwaru pro bezpečnostní části řídících systémů v divadelní technice." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-409080.
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This thesis describes what the theatre is and what types of machinery can be found there. Then the issue of stage technical machinery is presented into the czech context, respectively into the Europian legislation with the emphasis on the technical norms usage, which are necessary to fulfil in order to reach this aim. In the next part of the thesis is made the analysis of control systems, which are used in the stage technics with the emphasis on the functionality of these control systems, since this functionality determines number and range of possible danger and dangerous events, later on. These dangerous situations are named and specified in detail, thereby their existence, importance and necessity of solution is being emphasized. There is also a possible solution outlined that these dangerous events can be solved in many cases by using of these programmable systems relating to the safety, thereby safety functions realized by these functions. Then the single steps are described into V-model with appropriate documents of these V-model steps. Outcome of this thesis will be suggested model of method and its development and software validation for programmable and control systems in theatre technology.
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Bernatík, Michal. "Analýza rizik provozovaného CNC soustruhu SPM16." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399334.
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The thesis summarizes the legislative requirements for the operation of machines in the Czech Republic and the European Union. This thesis deals in detail with the analysis of technical standards related to machining tools, followed by the risk analysis of a specific machining tool operated in laboratories of the Faculty of Mechanical Engineering of the Brno University of Technology. The result of the thesis is the processing of identified risks and compliance with legislative requirements for the operation of the machining tool.
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Neubauer, Tomáš. "Databázová podpora hodnocení rizik strojů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228133.
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This diploma thesis focuses on the problem of machinery safety. Aim of this thesis was to elaborate the analysis and to choose the pivot elements for sorting data in the database for risk analysis. Next aims was to make the structure of the database and to create SW modules of application for machinery risk assessment.
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Plocek, Jaroslav. "Řízení jednoúčelového obráběcího stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232092.
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The master thesis treats the design of control system of special purpose machine tool. The first part analyzes and compares two possible variants of control system which use either a CNC control system Sinumerik or motion control system Simotion. Only the variant with the Simotion control system is subsequently examined in detail: its hardware configuration, the selection of components and partly also the software solution. The thesis further deals with the safety of the realized control system and of the whole machine. There are described general safety requirements of machinery based on harmonized European standards and their specific application in the design of safety functions and the safety circuits of solved machine tool.
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Smetana, Štěpán. "Bezpečnost obráběcích strojů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241835.
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This Master’s thesis concerns about the safety of machinery, in the literary research part you can find information about the law system and requirements of European Union and Czech Republic. There is a description of the legal enactments, which the manufacturers of machinery needs to follow. Second part of this thesis is about the safety of a milling center. The milling center is analyzed here, you can find here the description of its components. The milling center was then described with the help of block diagrams. For each component from the block diagram you can find here a list of dangerous situations which can occur and also a list of safety precautions for each situation. Based on these information the list of requirements for the milling center was made.
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Motyka, Pavel. "Analýza rizik výrobního systému." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229086.
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This thesis deals with risk assessment in the production system on the assembly line. Using risk analysis of each part of the production system will be realize the impact of the machinery to sevice. Then, by risk assessment often repetitive manual handling will be deal with the impact of the production system on health and safety service.
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Eriksson, Paul. "Automatisk sekvens av mesaugn : säkerhet och programmering." Thesis, Högskolan i Gävle, Avdelningen för elektroteknik, matematik och naturvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-36787.
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BillerudKorsnäs AB (BK) i Gävle är ett av de världsledande företagen inom tillverkning av vätskekartong. För att fortsatt vara ett ledande företag arbetar de dagligen med förbättringsförslag för att utveckla och öka fabrikens säkerhet och tillgänglighet. Detta examensarbete innehåller ett av många förbättringsförslag på avdelningen, Lut och Kraft. BillerudKorsnäs AB har en tydlig önskan om att åtgärda ett känt problem som kan leda till förödande ekonomiska konsekvenser. Examensarbetet har bestått av att införa en automatisk nedkylningssekvens av mesaugnen, med fokusområde på säkerhet och programmering. Säkerhet är ett brett område och arbetsuppgifterna har avgränsats till automationsnära uppgifter för att hålla sig inom tidsramen på tio veckor. För att hålla samma kontinuitet och standard hos BK har programmeringen utgått från att använda nuvarande programmeringsspråk funktionsblocks diagram i styrsystemet AC450 från ABB. Metoden som har använts i arbetet är aktionsforskning som innehöll planering, riskanalys och dokumentation för att minimera och eliminera tänkbara risker, relaterade till personsäkerhet och maskinutrustning. Målsättningen med examensarbetet var att ha en fungerade, säker och pålitlig nedkylningssekvens. För att optimera processen, avlasta processoperatören och förbättra arbetsmiljön i kontrollrummet genom att automatisera ett arbetsmoment. Simuleringen har påvisat att nedkylningssekvensens funktion uppfyller BK önskan. På grund av fabriksstopp under examensarbetets tidsram har idrifttagning blivit försenat och provkörningen har flyttats fram.BillerudKorsnäs AB (BK) in Gävle is one of the world-leading companies in the manufacture of liquid board. To continue to be a leading company, they work daily with improvement proposals to develop and increase the factory's safety and availability. This thesis contains one of many improvement proposals in the department, Lut och Kraft. BillerudKorsnäs AB has a clear desire to remedy a known problem that can lead to devastating financial consequences. The degree project has consisted of introducing an automatic cooling sequence of the lime kiln, with a focus area on safety and programming. Security is a broad area and the tasks have been limited to automation-related tasks to stay within the time frame of ten weeks. To maintain the same continuity and standard at BK, the programming has been based on using the current programming script function block diagram in the control system AC450 from ABB. The method that has been used in the work is action research that included planning, risk analysis and documentation to minimize and eliminate possible risks, related to personal safety and machine equipment. The goal of the degree project was to have a functional, safe, and reliable cooling sequence. To optimize the process, relieve the process operator and improve the working environment in the control room by automating a work step. The simulation has shown that the function of the cooling sequence fulfills the BK desire. Due to a factory shutdown during the degree project's time frame, commissioning has been delayed and the test drive has been moved forward.
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Cunda, Ondřej. "Posouzení bezpečnosti činností obsluhy u svislého soustružnického centra BASICTURN." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417464.
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The Master's thesis deals with the safety of operator activities at the BASICTURN vertical turning center. The first part is focused on the requirements arising from the directives of the European Parliament and the Council in relevant areas and a system analysis of the issue. The second part is a risk analysis related to operator activities on the operated machine.
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Aslansefat, K., Sohag Kabir, Amr R. A. Abdullatif, Vinod Vasudevan, and Y. Papadopoulos. "Toward Improving Confidence in Autonomous Vehicle Software: A Study on Traffic Sign Recognition Systems." IEEE, 2021. http://hdl.handle.net/10454/18591.
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YesThis article proposes an approach named SafeML II, which applies empirical cumulative distribution function-based statistical distance measures in a designed human-in-the loop procedure to ensure the safety of machine learning-based classifiers in autonomous vehicle software. The application of artificial intelligence (AI) and data-driven decision-making systems in autonomous vehicles is growing rapidly. As autonomous vehicles operate in dynamic environments, the risk that they can face an unknown observation is relatively high due to insufficient training data, distributional shift, or cyber-security attack. Thus, AI-based algorithms should make dependable decisions to improve their interpretation of the environment, lower the risk of autonomous driving, and avoid catastrophic accidents. This paper proposes an approach named SafeML II, which applies empirical cumulative distribution function (ECDF)-based statistical distance measures in a designed human-in-the-loop procedure to ensure the safety of machine learning-based classifiers in autonomous vehicle software. The approach is model-agnostic and it can cover various machine learning and deep learning classifiers. The German Traffic Sign Recognition Benchmark (GTSRB) is used to illustrate the capabilities of the proposed approach.
This work was supported by the Secure and Safe MultiRobot Systems (SESAME) H2020 Project under Grant Agreement 101017258.
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Bezrodný, Roman. "Bezpečnost pásové pily." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-377650.
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This Master's thesis summarizes the current legislative requirements resulting from the Directives of the European Parliament and Council and the legislative requirements of the Czech Republic in the field of cutting machines, with a focus on band saws. Furthermore, there is also an analysis of the requirements of the relevant harmonized standards. For information sorting, check lists for the construction of a band saw and a process map of the construction of the saw have been made. In the last part of this work, the selected safety applications were completed for the band saw.
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Svíčková, Jitka. "Bezpečnost nástrojové brusky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382474.
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The Master´s thesis concerns about the safety of tool grinder, and in the research part deals with the legislative requirements of the European Union and the Czech Republic. The basic legal provisions governing machinery manufacturers are described and analyzed here. The second part deals with the safety of tool grinder, risk analysis and proposal of preventive measures for risk reduction. The tool grinder is analyzed here and the results are summarized in the block diagram is drawn. Moreover, there are identified potential hazards for individual parts and the appropriate safety requirements are construed.
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Doležal, Martin. "Konstrukční návrh dřevoobráběcího stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230326.
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This thesis deals with designing woodworking piece of machinery for thicknessing technology, surfacing planer, cutting and mortising, which are combined by changeable adapters. Thesis cointains a survey of selected woodworking machinery and technologies. It also provides an overview of safety rules for manipulation with woodworking machines and also safety features the machinery must comprise. The technical evaluation is included.
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Atkinson, Glenn. "Automated mining machine safety investigation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/MQ37301.pdf.
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Belov, Vjačeslav. "Analýza požadavků na bezpečnost strojních zařízení v Evropské unii a Euroasijském ekonomickém svazu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318674.
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The diploma thesis analyzes the European, Czech and Russian standards and requirements for ensuring safety of machinery and methodical process to ensure safety through certification of machinery and centrifugal pumps specially introduced onto the market in the Eurasian Economic Union and the Russian Federation. The first part describes the legislative documents, their properties and the current legislative requirements of EU and EAES. In the second part is an analysis and described comparison of legislative safety requirements of the European Union, the Czech Republic, the Eurasian Economic Union and the Russian Federation. In the third part is described comparison of standards, and were made updates. In the practical part is an analysis of risks pump manufacturer "SIGMA GROUP" according to the requirements EAES and proposed methods for reducing risk prevention. Also in the practical part is analyzed and is created methodical preparation of certification of machinery and pumps placed on the market in the Eurasian Economic Union and the Russian Federation.
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Závodný, Tomáš. "Konstrukční návrh dřevoobráběcího stroje pro přípravu přířezů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-318384.
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This thesis deals primary with design of a woodworking machine focused on woodworking technology by cutting – rip saw. The introduction to the work is get to acquainted with the material to be processed – wood, and also the search of associated machines with the same technology of workpiece processing. Next part is focused on the safety of machining on woodworking machines and the individual safety features that the machines must contain are also analyzed. From this survey, a saw model with all the necessary features is created. The conclusion of the thesis is devoted to the risk analysis of the proposed machinery and their reduction.
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Tekin, Gokhan. "Design And Simulation Of An Integrated Active Yaw Control System For Road Vehicles." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609243/index.pdf.
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Active vehicle safety systems for road vehicles play an important role in accident prevention. In recent years, rapid developments have been observed in this area with advancing technology and electronic control systems. Active yaw control is one of these subjects, which aims to control the vehicle in case of any impending spinning or plowing during rapid and/or sharp maneuver. In addition to the development of these systems, integration and cooperation of these independent control mechanisms constitutes the current trend in active vehicle safety systems design.
In this thesis, design methodology and simulation results of an active yaw control system for two axle road vehicles have been presented. Main objective of the yaw control system is to estimate the desired yaw behavior of the vehicle according to the demand of the driver and track this desired behavior accurately.
The design procedure follows a progressive method, which first aims to design the yaw control scheme without regarding any other stability parameters, followed by the development of the designed control scheme via taking other stability parameters such vehicle sideslip angle into consideration. A two degree of freedom vehicle model (commonly known as &ldquoBicycle Model&rdquo
) is employed to model the desired vehicle behavior. The design of the controller is based on Fuzzy Logic Control, which has proved itself useful for complex nonlinear design problems. Afterwards, the proposed yaw controller has been modified in order to limit the vehicle sideslip angle as well. Integration of the designed active yaw control system with other safety systems such as Anti-Lock Braking System (ABS) and Traction Control System (TCS) is another subject of this study. A fuzzy logic based wheel slip controller has also been included in the study in order to integrate two different independent active systems to each other, which, in fact, is a general design approach for real life applications. This integration actually aims to initiate and develop the integration procedure of the active yaw control system with the (ABS). An eight degree of freedom detailed vehicle model with nonlinear tire model is utilized to represent the real vehicle in order to ensure the validity of the results. The simulation is held in MATLAB/Simulink environment, which has provided versatile design and simulation capabilities for this study. Wide-ranging simulations include various maneuvers with different road conditions have been performed in order to demonstrate the performance of the proposed controller.
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Svobodová, Veronika. "Návrh tepelného zdroje lokální soustavy CZT." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401565.
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The diploma thesis is focused on district heat supply, heat sources, machinery and safety equipment of boiler rooms. The main goal of the thesis is to modernize parts of the heat sources with the respective boiler room equipment in accordance with the latest available technology. The generated thermal energy is used for heating or hot water production for residential and non-residential buildings in the vicinity of the boiler room. In the theoretical part, the thesis focuses in more detail on boiler rooms, specifically on heat energy sources, machinery and safety equipment of boiler rooms, system ventilation and combustion exhaust. The findings are applied in the design of the new boiler room layout. It is followed by a detailed description of the current state of the boiler room and heat networks. An essential part of the work is the assessment of layout of the current heat sources and the creation of a new design for the replacement of insufficient sources and related equipment. The last goal is an economic overview of the designed project solution.
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Azman, Ahmet, and Sabra Meradi. "Development of an engraving machineby designing a protection cabin for laser marking." Thesis, Linnéuniversitetet, Institutionen för maskinteknik (MT), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-29509.
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The “Development of an existing engraving machine by designing a protection cabin for laser marking”project consists of the achievement of a protection cabin for a marking laser by applying the theory and the experience acquired during the courses in Mechanical Engineering program. Degree project is made with the Maskinteknik i Oskharsham AB by the Mechanical Engineering student, Ahmet Azman and Sabra Meradi. This protection cabin is design for the Deckel GK 21 engraving machine that company already bought it several years ago. The safety requirements for laser protection cabin shown in IEC and ISO standard will be observed. The design process explained in the GETTING DESIGN RIGHT: A Systems Approach book will be followed to achieve this project. Six steps of this method are followed: Define the problem, Measure the needs and set targets, Explore the design space, Optimize design choices, Develop the architecture, Validate the project.
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Pafkovič, Roman. "Analýza rizik provozované CNC frézky MCV 754Q." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399342.
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This Master’s thesis deals with the safety of an operated CNC milling machine. The first part of the thesis is focused on the legislative requirements of the European Union and the Czech Republic, system analysis of the topic and used methods. The second part of the thesis is focused on the risk analysis of the chosen machinery.
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Al-Khoury, Fadi. "Safety of Machine Learning Systems in Autonomous Driving." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-218020.
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Machine Learning, and in particular Deep Learning, are extremely capable tools for solving problems which are difficult, or intractable to tackle analytically. Application areas include pattern recognition, computer vision, speech and natural language processing. With the automotive industry aiming for increasing amount of automation in driving, the problems to solve become increasingly complex, which appeals to the use of supervised learning methods from Machine Learning and Deep Learning. With this approach, solutions to the problems are learned implicitly from training data, and inspecting their correctness is not possible directly. This presents concerns when the resulting systems are used to support safety-critical functions, as is the case with autonomous driving of automotive vehicles. This thesis studies the safety concerns related to learning systems within autonomous driving and applies a safety monitoring approach to a collision avoidance scenario. Experiments are performed using a simulated environment, with a deep learning system supporting perception for vehicle control, and a safety monitor for collision avoidance. The related operational situations and safety constraints are studied for an autonomous driving function, with potential faults in the learning system introduced and examined. Also, an example is considered for a measure that indicates trustworthiness of the learning system during operation.Maskininlärning, och i synnerhet deep learning, är extremt kapabla verktyg för att lösa problem som är svåra, eller omöjliga att hantera analytiskt. Applikationsområden inkluderar mönsterigenkänning, datorseende, tal‐ och språkförståelse. När utvecklingen inom bilindustrin går mot en ökad grad av automatisering, blir problemen som måste lösas alltmer komplexa, vilket har lett till ett ökat användande av metoder från maskininlärning och deep learning. Med detta tillvägagångssätt lär sig systemet lösningen till ett problem implicit från träningsdata och man kan inte direkt utvärdera lösningens korrekthet. Detta innebär problem när systemet i fråga är del av en säkerhetskritisk funktion, vilket är fallet för självkörande fordon. Detta examensarbete behandlar säkerhetsaspekter relaterade till maskininlärningssystem i autonoma fordon och applicerar en safety monitoring‐metodik på en kollisionsundvikningsfunktion. Simuleringar utförs, med ett deep learning‐system som del av systemet för perception, som ger underlag för styrningen av fordonet, samt en safety monitor för kollisionsundvikning. De relaterade operationella situationerna och säkerhetsvillkoren studeras för en autonom körnings‐funktion, där potentiella fel i det lärande systemet introduceras och utvärderas. Vidare introduceras ett förslag på ett mått på trovärdighet hos det lärande systemet under drift.
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Jin, Fenghua. "Machine vision technology for food quality and safety inspections." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8772.
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Thesis (Ph. D.) -- University of Maryland, College Park, 2008.Thesis research directed by: Fischell Dept. of Bioengineering . Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
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Woodruff, Jonathan David. "CHERI : a RISC capability machine for practical memory safety." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708309.
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Joannou, Alexandre Jean-Michel Procopi. "High-performance memory safety : optimizing the CHERI capability machine." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/274350.
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This work presents optimizations for modern capability machines and specifically for the CHERI architecture, a 64-bit MIPS instruction set extension for security, supporting fine-grained memory protection through hardware-enforced capabilities. The original CHERI model uses 256-bit capabilities to carry information required for various checks helping to enforce memory safety, leading to increased memory bandwidth requirements and cache pressure when using CHERI capabilities in place of conventional 64-bit pointers. In order to mitigate this cost, I present two new 128-bit CHERI capability formats, using different compression techniques, while preserving C-language compatibility lacking in previous pointer compression schemes. I explore the trade-offs introduced by these new formats over the 256-bit format. I produce an implementation in the L3 ISA modeling language, collaborate on the hardware implementation, and provide an evaluation of the mechanism. Another cost related to CHERI capabilities is the memory traffic increase due to capability-validity tags: to provide unforgeable capabilities, CHERI uses a tagged memory that preserves validity tags for every 256-bit memory word in a shadowspace inaccessible to software. The CHERI hardware implementation of this shadowspace uses a capability-validity-tag table in memory and caches it at the end of the cache hierarchy. To efficiently implement such a shadowspace and improve on CHERI’s current approach, I use sparse data structures in a hierarchical tag-cache that filters unnecessary memory accesses. I present an in-depth study of this technique through a Python implementation of the hierarchical tag-cache, and also provide a hardware implementation and evaluation. I find that validity-tag traffic is reduced for all applications and scales with tag use. For legacy applications that do not use tags, there is near zero overhead. Removing these costs through the use of the proposed optimizations makes the CHERI architecture more affordable and appealing for industrial adoption.
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Lauer, Peter. "Enabling sil2 safety certified applications for mobile machine oems." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71269.
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Eaton created a new safety controller architecture to allow our customers to design implement, verify and maintain a SIL-2 safety certified application for compliance with IEC 61508:2010 and ISO 13849 Functional Safety Standards. The new architecture has been implemented in a line of safety controllers SFX12 and SFX20 that extend the line of existing mobile controllers HFX12 to HFX48. The new controllers are targeted for controlling mobile and stationary machine applications with focus on steer by wire and propel by wire.
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Jurásek, David. "Bytový dům Suchdolské Zahrady - stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226508.
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The object of this thesis is to implement the contruction of the apartment block in Prague's area Suchdol. This report contains the technical report for construction technological project, technical report of site facilities, technological regulation, budget, time management, project of machinery assembly, inspection and test plan, environmental plan, occupational safety, study of main technological stages and comparative study.
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Valc, Lukáš. "Posouzení bezpečnosti činností obsluhy u vertikálního obráběcího centra MCFV 1260." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417793.
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This diploma thesis deals with the safety assessment of operator’s activities at the MCFV 1260 vertical machining center. Then a system analysis of the issue is created with a proposal and justification of the chosen procedure. In the second part of the thesis there is solved the failure risk analysis, which is focused on the operations of the operator in the area of maintenance, service and during the operation of the vertical machining center located in the company TAJMAC – ZPS Zlín. The result of this thesis is the design and recommendation of preventive measures to reduce unacceptable risks in the relevant operations at the machining center.
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Bechyně, Petr. "Výrobní hala Lysá nad Labem - stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265269.
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This thesis deals with the progress in the construction of the manufacturing hall in Lysa nad Labem. Mainly focuses on the technological phase of mounting reinforced concrete frame which is processed technological prescription too. There are also chapters dealt with elements of site facilities, transport relations, machine mechanisms, inspection and controling plan, or ecology and health and safety.
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Heydorn, Matthew Ryan. "Increased Cyclist Safety Using an Embedded System." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7391.
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In order to reduce bicycle-vehicle collisions, we design and implement a cost effectiveembedded system to warn cyclists of approaching vehicles. The system uses an Odroid C2 singleboard computer (SBC) to do vehicle and lane detection in real time using only vision. The system warns cyclist are warned of approaching cars using both a smartphone app and an LED indicator. Due to the limited performance of the Odroid C2 and other low power and low cost SBCs,we found that existing detection algorithms run either too slowly or do not have sufficient accuracy to be practical. Our solution to these limitations is to create a custom fully convolutional network(FCN) which is small enough to run at real time speeds on the Odroid C2 but robust enough tohave decent accuracy. We show that this FCN runs significantly faster than Tiny YOLOv3 andMobileNetv2 while getting similar accuracy when all are trained on a limited dataset. Since no dataset exists that separates the fronts of vehicles from other poses and is in the context of city and country roads, we create our own. Creating a dataset to train any detector hastraditionally been time consuming. We present and implement a way to efficiently do this usingminimal hand annotation by generating semi-synthetic images by cropping relatively few positive images into many background images. This creates a wider background class variance than wouldotherwise be possible.
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De, galvez Nicholas. "Sécurité des machines : méthodologie d’identification systématique des phénomènes dangereux en conception." Thesis, Paris, ENSAM, 2016. http://www.theses.fr/2016ENAM0052/document.
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Les concepteurs de machines de production doivent prendre en consideration les differents aspects des produits tels que la technologie, la legislation et la securite professionnelle. la directive europeenne 2006/42/ce definie les principes de prevention des risques professionnels. destinee aux concepteurs de machines, son objectif est d’imposer la necessite d’obtenir le niveau de risque le plus faible possible selon l’etat de l’art. bien que les concepteurs de machines catalogues ont acces a des normes specifiques pour realiser les analyses a priori, ce n’est pas le cas pour les concepteurs de machines speciales. une approche originale appelee ezid est presentee dans ce papier pour aider tous les concepteurs de machine pour l’identification des phenomenes dangereux.basee sur le fait que les phenomenes dangereux sont lies a la presence d’energie, ezid les identifie au travers de la detection des parametres de conception lies aux sources et flux d’energie. elle renvoie ensuite de maniere organisee les informations relatives a tous les echanges d’energie potentiels entre les operateurs et la machine aux concepteurs, mettant en lumiere le besoin d’ajouter des solutions pour la prevention des risquesMachine designers must take into account different aspects of products such as technology, legislation and occupational safety. european directive 2006/42/ce promulgates machine safety design principles to prevent occupational risks. aimed at machine designers, its objective is to set out the need to obtain the lowest possible risk level according to the state of the art. although the designers of catalog machines have access to specific standards to perform a priori risk analyses, this is not the case for special machine designers. an original approach called ezid is presented in this report to help all machine designers in the task of hazard identification.based on the fact that hazards are linked to the presence of energies, ezid identifies hazards through the detection of design parameters linked to energy sources and flows. it then feeds back organized information to designers on every potential exchange of energy between the machine and its operators, bringing to light the need to add risk prevention solutions
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Jansová, Markéta. "Stavebně technologický projekt přístavby traktu rehabilitačního ústavu v Brandýse nad Orlicí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-226088.
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My diploma thesis solves an extension of rehabilitation centre. The building technological project in this diploma thesis contains primarily technology procedure, model of the building site accessories, time schedule, check and test plan and budget for this extension. Specialization is drawn from the field of structural engineering - thermal and technical assessment of the building.
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Mahmud, Nidhal. "Dynamic model-based safety analysis : from state machines to temporal fault trees." Thesis, University of Hull, 2012. http://hydra.hull.ac.uk/resources/hull:6757.
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Finite state transition models such as State Machines (SMs) have become a prevalent paradigm for the description of dynamic systems. Such models are well-suited to modelling the behaviour of complex systems, including in conditions of failure, and where the order in which failures and fault events occur can affect the overall outcome (e.g. total failure of the system). For the safety assessment though, the SM failure behavioural models need to be converted to analysis models like Generalised Stochastic Petri Nets (GSPNs), Markov Chains (MCs) or Fault Trees (FTs). This is particularly important if the transformed models are supported by safety analysis tools. This thesis, firstly, identifies a number of problems encountered in current safety analysis techniques based on SMs. One of the existing approaches consists of transforming the SMs to analysis-supported state-transition formalisms like GSPNs or MCs, which are very powerful in capturing the dynamic aspects and in the evaluation of safety measures. But in this approach, qualitative analysis is not encouraged; here the focus is primarily on probabilistic analysis. Qualitative analysis is particularly important when probabilistic data are not available (e.g., at early stages of design). In an alternative approach though, the generation of combinatorial, Boolean FTs has been applied to SM-based models. FTs are well-suited to qualitative analysis, but cannot capture the significance of the temporal order of events expressed by SMs. This makes the approach potentially error prone for the analysis of dynamic systems. In response, we propose a new SM-based safety analysis technique which converts SMs to Temporal Fault Trees (TFTs) using Pandora — a recent technique for introducing temporal logic to FTs. Pandora provides a set of temporal laws, which allow the significance of the SM temporal semantics to be preserved along the logical analysis, and thereby enabling a true qualitative analysis of a dynamic system. The thesis develops algorithms for conversion of SMs to TFTs. It also deals with the issue of scalability of the approach by proposing a form of compositional synthesis in which system large TFTs can be generated from individual component SMs using a process of composition. This has the dual benefits of allowing more accurate analysis of different sequences of faults, and also helping to reduce the cost of performing temporal analysis by producing smaller, more manageable TFTs via the compositionality. The thesis concludes that this approach can potentially address limitations of earlier work and thus help to improve the safety analysis of increasingly complex dynamic safety-critical systems.
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Zhu, Jessica H. "Detecting food safety risks and human tracking using interpretable machine learning methods/." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122384.
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This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: S.M., Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center, 2019
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 75-80).
Black box machine learning methods have allowed researchers to design accurate models using large amounts of data at the cost of interpretability. Model interpretability not only improves user buy-in, but in many cases provides users with important information. Especially in the case of the classification problems addressed in this thesis, the ideal model should not only provide accurate predictions, but should also inform users of how features affect the results. My research goal is to solve real-world problems and compare how different classification models affect the outcomes and interpretability. To this end, this thesis is divided into two parts: food safety risk analysis and human trafficking detection. The first half analyzes the characteristics of supermarket suppliers in China that indicate a high risk of food safety violations. Contrary to expectations, supply chain dispersion, internal inspections, and quality certification systems are not found to be predictive of food safety risk in our data. The second half focuses on identifying human trafficking, specifically sex trafficking, advertisements hidden amongst online classified escort service advertisements. We propose a novel but interpretable keyword detection and modeling pipeline that is more accurate and actionable than current neural network approaches. The algorithms and applications presented in this thesis succeed in providing users with not just classifications but also the characteristics that indicate food safety risk and human trafficking ads.
by Jessica H. Zhu.
S.M.
S.M. Massachusetts Institute of Technology, Sloan School of Management, Operations Research Center
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Elkin, Colin P. "Development of Adaptive Computational Algorithms for Manned and Unmanned Flight Safety." University of Toledo / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1544640516618623.
Full text
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Bartošová, Zlata. "Stavebně technologický projekt pro Domov seniorů." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225382.
Full textAbstract:
This thesis deals with the technological solution building construction project seniors home in Prague. Contains a technical report, technical regulations for monolithic and brick structures, which are documented inspection and test plans, as well as time and financial plans and project construction site.