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Functional safety of pressure transmitters of BD SENSORS company
Šimoník, Martin ; Hlinka,, Jiří (referee) ; Fuchs,, Pavel (advisor)
This master thesis examines the functional safety of the pressure sensor XMP i which is produced by BD SENSORS Company. The aim of this thesis is the demonstration of compliance of the pressure sensor XMP I with functional safety integrity level SIL3 requirements. The thesis is divided into three parts. The first part deals with the concept of functional safety, defines the basic concepts of functional safety, compares the approaches of functional safety according to selected standards and provides a general procedure for the functional safety determination. The second part deal with technical systems reliability defines reliability indicators and describes selected types of reliability analysis used in practice, especially the FMEA/FMECA analysis. Third part deals with the reliability analysis of the sensor XMP i and with evaluation of results.
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Detecting RTOS Runtime Anomalies
Arm, Jakub ; Jalovecký, Rudolf (referee) ; Blecha, Petr (referee) ; Bradáč, Zdeněk (advisor)
Due to higher requirements of computational power and safety, or functional safety ofequipments intended for the use in the industrial domain, embedded systems containing areal-time operating system are still the active area of research. This thesis addresses thehardware-assisted control module that is based on the runtime model-based verificationof a target application. This subsystem is intended to increase the diagnostic coverage,particularly, the detection of the execution errors. After the specification of the architecture,the formal model is defined and implemented into hardware using FPGA technology.This thesis also discuss some other aspects and embodies new approaches in the area ofembedded flow control, e.g. the integration of the design patterns. Using the simulation,the created module was tested using the created scenarios, which follow the real programexecution record. The results suggest that the error detection time is lower than usingstandard techniques, such a watchdog.
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CIP Safety
Šindelek, Milan ; Stibor, Karel (referee) ; Štohl, Radek (advisor)
This master’s thesis deals with the security machinery using available technologies. It contains a description to assess and reduce the risk of machine design of security measures and their application. In each section are provides descriptions of the standards, using the CIP Safety communication technology, design and implementation security measures of machine at two demonstration learning tasks.
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Self-Testing of Microcontrollers
Denk, Filip ; Šimek, Václav (referee) ; Strnadel, Josef (advisor)
This Master's thesis deals with functional safety of electronic systems. Specifically, it focuses on self-testing of the microprocessor and its peripherals at the software level. The main aim of the thesis is to design and implement a set of functions written in programming language C or assembly language, which automatically test the selected areas of the microcontroller. Resources and methods used in the implemented solution also aim to meet the requirements according to the safety standard IEC 60730-1, Annex H, Software Class B. The microcontroller NXP LPC55S69 was chosen as a hardware platform. It consists of two ARM Cortex-M33 cores. As a result, the example application is provided, which uses implemented test functions at the run-time. Example application also contains a graphical user interface with fault injection ability.
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Evaluation of present technologies in ensuring functional safety of machinery
Koten, Jakub ; Blecha, Radim (referee) ; Zahálka, Jiří (advisor)
This bachelor’s thesis deals with the evaluation of present technologies in ensuring functional safety of machinery. The first part devotes to the technical standards, which are related to this issue. It explains the most common terms occurring in these standards and the description of the basic principles for the design and ensuring the functional safety of machinery. The second part presents the elements ensuring functional safety. These are the input elements that monitor a device and its surroundings. Logical elements which, under specified conditions assess inputs and send output elements impulses to respond. Then there is the chapter showing on the example the design and verification of the performance level and safety integrity level.
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Improvement of company processes to assure safety of products
Zvolánková, Kateřina ; Jankových, Róbert (referee) ; Prostredník, Daniel (advisor)
The diploma thesis devotes to the process of ensuring functional safety of products in Bosch Rexroth Brno, which deals with industrial hydraulic systems. The first part introduces the basic legislative regulations concerning product safety and describes selected standards relevant to this thesis. The second part focuses on Bosch Rexroth and the current state in the field of ensuring functional safety of their products. It also includes a description of the functional safety solution of a specific project – a hydraulic try-out press. At the end of the thesis, improvements to the process of ensuring functional safety in response to the identified shortcomings are proposed.
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Evaluation of present technologies in ensuring functional safety of machinery
Smetana, Štěpán ; Tůma, Zdeněk (referee) ; Zahálka, Jiří (advisor)
This bachelor’s thesis is concerning functional safety as a whole. The first part of the paper will provide a description of what we can imagine under the term of functional safety and why we should pay attention to it. The document also includes introduction of safety components used in a frame of functional safety and its brief description. You can find here methodical approach to calculation of performance level PL and safety integrity level SIL, this calculation is shown on an example of an emergency stop function.
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Functional Safety for Microcontrollers
Klecker, Jan ; Pavlík, Michal (referee) ; Hejátková, Edita (advisor)
This Master’s thesis deals with the principles and mechanisms of functional safety for microcontrollers. The IEC 60730 and IEC 60335 standards are described, from which the requirements for testing of microcontroller functional blocks are derived. Furthermore, the requirements for designing safety software are discussed. The most important chapter of the theoretical part is the design and discussion of functional safety tests for the given peripherals. In the practical part, a demo hardware of a gas boiler with safety features and diagnostic mechanisms controlled by two NXP KV46 microcontrollers communicating via a UART interface is designed. In the software chapter, the design of the application software for the gas boiler is described and then functional safety tests are implemented for the microcontrollers. For testing and demonstration purposes, a graphical user interface is designed in the FreeMASTER tool.
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Methodology Development and Validation of Software for Safety-Related Parts of Control Systems in Theater Technique
Drlík, Michal ; Suchánek, Rostislav (referee) ; Sinay, Juraj (referee) ; Blecha, Petr (advisor)
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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Pallet conveyor retrofit
Thér, Tomáš ; Jirgl, Miroslav (referee) ; Benešl, Tomáš (advisor)
This bachelor thesis designes new hardware and software designated for retrofit of a pallet conveyor for the purpose of improvement of it's functionability and safety. The work consists of a theoretical describtion of new and already used electrical components, their utilization and creation of the technical documentation. The next part deals with the design of the control software and visualization of the HMI panel. A virtual model of the conveyor was created to test the functionability of the program before it was tested on the real conveyor. The last part consist of funcional safety's theory and its evaluation.
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