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Reliability assessment of a hydraulic switchboard production proces
Machová, Lenka ; Maradová, Karla (referee) ; Blecha, Petr (advisor)
The Diploma thesis is focused on possibilities of an assessment of a hydraulic switchboard and its manufacturing process. Furthermore, it analyses methods individually which are suitable for quality assurance and production reliability, which are described in details. The follow-up work focuses more on the Statistical Process Control (SPC) method which is applicable in the early warning system and the Failure mode, effects, and criticality analysis (FMECA) method, applicable in the planning system. These two methods are further applied to the newly introduced process of machining the hydraulic switchboard as an effective tool not only for assessing the reliability of production, but also for its subsequent securing and maintaining in a relevant condition.
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Reliability of Technical Systems
Jirgl, Miroslav ; Šedivá, Soňa (referee) ; Havlíková, Marie (advisor)
This thesis deals with a reliability of technical systems. It is divided into four main parts. The first part deals with the mathematical description of reliability. Probability and statistics are used for this description. This part includes the definition and properties of random events, the description of discrete and continuous random variable and its distribution. The second part contains the definition and expression of reliability, types of faults in the digital circuits and the reliability of electronic components. This part introduces into problems of reliability. The third part includes making the reliability diagrams and reliability analysis. Each method is briefly described here. Further advantages and disadvantages of using each method are given here. The two most widely used reliability analysis - Failure Mode and Effect Analysis - FMEA (resp. FMECA) and Fault Tree Analysis – FTA are described in a greater detail. The last part focuses on an example of calculation of reliability. An analyzed object is Universal Charger NiMH and NiCd batteries. Reliability is analysed by block diagram, FTA and FMEA.
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FMECA procedural analysis of a cardboard stand
Potěšilová, Hana ; Molák, Radek (referee) ; Blecha, Petr (advisor)
The thesis deals with application of method FMECA to the manufacturing process of cardboard stand. The aim of work is to describe cardboard stand manufacturing, identify fault conditions and their consequences in particular manufacturing processes. In order to increase reliability of cardboard stands, we have designed measures based on analysis of criticality.
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Risk management in an engineering company
Bukáčková, Kristýna ; Drlík, Michal (referee) ; Blecha, Petr (advisor)
The aim of the diploma thesis is to provide a complex analysis of risk management in engineering company EST Stage Technology a.s. In the first part of the thesis, the research study focused on the risk management from the economic and technical point of view was conducted. The next chapter deals with case study including the description of mentioned company, considering the history, business sector and selected economic indicators. In this part, PESTLE and SWOT analysis is also performed. Further part provides the analysis of profitability, liquidity, activity and debt indicators. The following chapter describes the process of industrial contract solution. The last part of the diploma thesis deals with the failure mode, effects and criticality analysis (FMECA). The detailed analysis of failures, which can arise in various phases of contract solution, is provided. The causes and consequences of that failures are also mentioned, while the measures lowering the risk of particular failure to acceptable level are suggested.
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Modelling and prediction of reliability
Jirgl, Miroslav ; Jalovecký,, Rudolf (referee) ; Havlíková, Marie (advisor)
This thesis presents a reliability analysis of a technical system. It is divided into three main sections. The first section introduces some of the most significant problems of reliability. It deals with a definition and an expresion of reliability, a reliability diagram selection and a detailed description of the reliability analysis. This part also includes an overview of reliability analysis types. Some of the most widely used reliability analyses are briefly described; further advantages and disadvantages of using each method are listed. Failure Modes and Effects Analysis - FMEA is then described in a greater detail. The second section contains an analysis of aviation conditions as well as a design of a reliability analysis that concerns a selected digital system; the system under analysis is a pitch trim indicator. The main design issue lies in a choice of a most suitable method. This choice stems from the overview of reliability analyses presented in the first section of the thesis. In the last section, a FMEA reliability analysis of the pitch trim indicator is conducted. This part includes a discussion of the results as well as a design action that is to lead to an increase in reliability of the analyzed system.
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Process FMECA - implementation of information system in the bank
Müllerová, Marie ; Koch, Miloš (referee) ; Blecha, Petr (advisor)
This thesis considers of process FMECA analysis that is applied to the process of implementation the information system in the bank. The theoretical part focuses on risk management and using of methods FMEA and FMECA. In the practical part of thesis is introduced the company, for that the process of implementation of the information system is designed. In addition the analysis of the external and internal environment in relaiton to the information system is made. The result of these analysis is SWOT analysis. Then the process of implementation the information system is described and FMECA analysis is performed. Based of the results of the analysis are designed appropriate measures that will eliminate the risks or that will reduce their impacts.
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Electrotechnical production mapping and improvement
Kutnar, Pavel ; Starý, Jiří (referee) ; Špinka, Jiří (advisor)
This thesis is an introduction into quality management of electrotechnical production. It consists of a theoretical treatise on FMEA analysis and process mapping. The FMEA analysis was applied to the manufacturing process in an electrotechnical company. Selected critical failures were analyzed and corrective measures were suggested.
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Predictive machine tools maintenance system with the use of vibrodiagnostics
Semotam, Petr ; Nahodil, Petr (referee) ; Hammer, Miloš (advisor)
This diploma thesis concerns issues of predictive and condition based maintenance system of machine tools with using a vibrodiagnostics. It studies and researches its impacts through the basic processes of the maintenance system and characterizes the vibration diagnosis as its tool and mean. There is also described a process of putting condition based maintenance into practice in the practical part of the thesis. The development is realized at Siemens Ltd. Brno with all its requirements and aspects such as a maintenance audit which means the decision on the suitability of condition based maintenance within the current maintenance system, technical analysis as a part of introduction of vibration diagnosis and the practical example of acquiring, recording and assessment of measured vibration. Prior to the end the economic evaluation of the planned predictive maintenance system and the design of the general model of development and implementation of the maintenance system into practice are included.
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Proactive machine maintenance system
Semotam, Petr ; Řezníčková, Hana (referee) ; Hammer, Miloš (advisor)
This bachelor thesis concerns issues of proactive maintenance, which is focused on machine tools. The most common failures and the most widespread methods of diagnostics of machine tools are described in the thesis. There are also described the procedure of Failure mode, effects and criticality analysis FMEA/FMECA, its possible development in the future with demonstrative presentation of application this analysis on CNC automatic lathe. Subsequently, in the practical part there has been chosen, described and appraised diagnostic of vibrations. Prior to the end the process in field of solving of establishment systems of maintenance has been recommended for SMC Industrial Automation CZ LLC Vyškov.
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