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Lecturer(s)
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Kamenický Jan, Ing. Ph.D.
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Course content
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The main aim of this subject is to teach students how to define basic requirements of functional safety and how to prove that proposed technical objects are able to fulfil requested funcitonal safety level. For that purpose students meet the basic dependability characteristics and dependability methods. Students also meet the basic principles of risk assessment and acceptance criterions of individual and social risk. In the next step student will meet hte functional safety basis and the approach to the functional safety assurance in the automitive industry, railway applications, machinery applications and electronic/elekctronical systems. Student also meets the LOPA (Layers of Protection Analysis). Regarding the complexity of the functional safety theme the subject runs from the general starting point to the concrete information. That means subjects goes from the dependability basis, risk assessment and its tolerableness to the safety integrity proving by the dependability calculations. Lectures 1. Dependability principles I - Random variable in dependability, basic types of system`s structures and its dependability calculations. 2. Dependability principles II - Types of faults, failure diagnosis, hidden failure`s influence 3. Dependabilty principles III - collection and prediction of data 4. Dependability methods I - Application of the FMEA/FMECA by the possible failures analysis. 5. Dependability methods II - Reliability Block Diagrams, Markov Analysis and Human Reliability Analysis 6. Dependability methods III - Application of the FTA/ETA by the dependability and safety analysis. 7. Maintenance as a basic way how to affect dependability. 8. Basic terminology of risk management and legislative regarding technical objects safety. 9. Risk elements, risk matrix, risk acceptance and Layer of Protection Analysis. 10. Overall safety, functional safety and safety life cycle. Safety Integrity Level. Practices 1. Calculation of the dependability parameters based on the example of the technical object with evidence of its operation and failure rate. 2. Calculation of the dependability parameters based on the example of the different types of system structure (serial, parallel and voting) 3. Calculation of the diagnostic coverage, dependability parameters calculation considering hidden failures. 4. Application of FMEA/FMECA. 5. Application of the RBD, risk matrix andtesting of the Human Dependability. 6. Application of the FTA/ETA. 7. Production Loss Equation, Maintenance Effectiveness Index. 8. Risk matrix (qaulitative, semiqantitative and fully quantitaive) - real life example, evaluation of the risk acceptance, proposal of protection layers conception. 9. Life cycle of overall system safety and functional safety. 10. Hazard Identification, Risk evaluation of technical object and its safety integrity proposal.
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Learning activities and teaching methods
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Lecture, Practicum
- Class attendance
- 40 hours per semester
- Home preparation for classes
- 10 hours per semester
- Preparation for credit
- 10 hours per semester
- Preparation for exam
- 20 hours per semester
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Learning outcomes
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The main aim of this subject is to teach students how to define basic requirements of functional safety and how to prove that proposed technical objects are able to fulfil requested funcitonal safety level. For that purpose students meet the basic dependability characteristics and dependability methods. Students also meet the basic principles of risk assessment and acceptance criterions of individual and social risk. In the next step student will meet hte functional safety basis and the approach to the functional safety assurance in the automitive industry, railway applications, machinery applications and electronic/elekctronical systems. Student also meets the LOPA (Layers of Protection Analysis). Regarding the complexity of the functional safety theme the subject runs from the general starting point to the concrete information. That means subjects goes from the dependability basis, risk assessment and its tolerableness to the safety integrity proving by the dependability calculations.
Student will acquire the basic overview about commonly used dependability parameters of technical systems, about the methods used to its evaluation and about possibilities of using these parameters e.g. for the safety level assessment.
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Prerequisites
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Unspecified
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Assessment methods and criteria
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Combined examination, Test
The essential condition for successfully completing the subject is activity on the practice lectures and passing of the credit test. The exam is both written and oral.
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Recommended literature
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ČSN EN ISO 13849-1:2006, Bezpečnost strojních zařízení ? Bezpečnostní části ovládacích systémů ? Část 1: Všeobecné zásady pro konstrukci. 2006.
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ČSN EN 61508-5:2011, Funkční bezpečnost elektrických/elektronických/programovatel-ných elektronických systémů souvisejících s bezpečností ? Část 5: Příklady metod určování úrovní integrity bezpečnosti.
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ČSN EN 61511-x:2005, Funkční bezpečnost. Bezpečnostní přístrojové systémy pro sektor průmyslových procesů.
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ČSN EN 62061:2005, Bezpečnost strojních zařízení ? Funkční bezpečnost elektrických, elektronických a programovatelných elektronických řídicích systémů souvisejících s bezpečností. 2005.
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Bednařík Josef a kol. Technika spolehlivosti v elektronické praxi. Praha, 1990.
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Callabro, S. R. Základy spolehlivosti a jejich využití v praxi. Praha, 1965.
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