Řídicí systémy se zvýšenou bezpečností

Tato práce se zabývá funkční bezpečností elektronických řídicích systémů. V první části jsou popsány pojmy z oblasti bezpečnosti systémů obecně, dále jsou porovnány různé obory, ve kterých hraje požadavek bezpečnosti důležitou roli. V metodické části práce jsou teoreticky rozepsány jednotlivé kroky v procesu návrhu elektronického systému určeného pro aplikace vyžadující definovanou úroveň bezpečnosti se zaměřením na hardwarovou část. V této kapitole jsou podrobně vysvětleny jednotlivé požadavky, pro usnadnění návrhu nebo přípravy systému pro možnost deklarace shody s požadavky normy ČSN EN 61508. V závěru práce je popsán rozbor příkladové aplikace od fáze konceptu a specifikace požadavků přes návrh až po konečné analýzy a hodnocení systému.ObhájenoThis thesis deals with the function safety of electronic control system. The first part describes the terms of the system safety in general and presents the comparison of the various fields in which the requirement of safety plays an important role. The design steps of an electronic system design are theoretically described in the methodological part of the thesis. The methodology is targeted for safety related applications focusing on the hardware part. This chapter explains in detail the individual requirements to facilitate the design or the system preparation for the possibility of declaring conformity with the requirements of the ČSN EN 61508 standard. At the end of the thesis the analysis of an example application is described from the concept stage and specification of requirements through design to final analysis and system evaluation

Using FMEA method for risk analysis of electronic systems

This article deals with reliability and safety assessment of the systems using highly structured systematic analysis FMEA (Failure Mode and Effect Analysis). The FMEA is one of the most commonly used qualitative methods of reliability analysis. This method is often perceived as a tool for managing and improving quality in pre-production stages. The paper describes the basic characteristics and the most important parts of the FMEA

Programming and operation of the automotive electronics control unit

Předkládaná diplomová práce se zabývá naprogramováním emulátoru řídicí jednotky automobilu pomocí modelovacího prostředí Matlab-Simulink. Úvodní část se zabývá použitím universálních testovacích emulátorů a možnostmi jejich programování. Následuje popis konkrétně použitého emulátoru včetně všech jeho rozhraní a možného využití. Dále jsou uvedeny vlastnosti Simulinku a jeho nastavení pro základní používání knihovny Embedded Coder. Pátá kapitola se zabývá konfigurací programu PROVEtech:TA. Další dvě části jsou věnovány popisu vytvořených modelů. Model řídící jednotky nahraný v emulátoru a model prostředí nahraný v ?HiLu. V poslední kapitole je popis výsledků této soustavy.Katedra aplikované elektroniky a telekomunikacíObhájenoPresented master thesis deals with programming of an emulator for a car controlling unit using the Matlab-Simulink software. The first part deals with the usage of universal testing emulators and their programming options. In the following part is description of used emulator with all of its interfaces, and potential uses. Then there are the properties of Simulink and setting for a basic library Embedded Coder. The fifth part is focused on configuration of PROVEtech:TA software. The next two sections describes the developed models. Control unit model recorded in the emulator and environment model recorded in ?HiL. In the last chapter is a description of the results of this system

The architectures of the systems for increased safety requirements

This paper deals with the structures and the architectures of the safety related systems. The assignment of architecture, which is related to the application of the system, belongs to one of the most important parts of the equipment design. The most used architectures 1oo2, 2oo2 and 2oo3 are briefly described. This article discusses the basic characteristics, features and abbreviated designation of mentioned architectures. The conclusion points out the difference of the abbreviated designation and meaning of individual structures

New Design Methodology – Using VHDL-AMS Models to Consider Aging Effects in Automotive Mechatronic Circuits for Safety Relevant Functions

In this paper a design method for mechatronic functions in an early design phase under consideration of the requirements of functional safety is proposed [14]. The goal of the method is to discover threats for the safety goals and to prove or optimize the diagnostic mechanisms. At the current design process a lifetime endurance test is performed in a late project phase. In order to avoid unexpected late design changes the method should be applied in an early design phase. The method is an additional way to avoid design failures for E/E functions with special focus on aging in the field of functional safety applications. The method is developed out of three standards VDI 2221 methodology for development and construction of technical systems and products [1]), VDI 2206 design methodology for mechatronic systems [2] and the ISO 26262 road vehicles - Functional Safety [3] by using the V-Model. Furthermore, a core element of the design method is simulating aging effects by applying VHDL – AMS. To demonstrate the design methodology a sensor out of the EGAS function is chosen as a safety relevant automotive system. The limitation is the availability of aging data for electrical components

Dynamic Inductive Coupling Based Wireless Rotor Monitoring System

The paper presents a new technology and design methodology of dynamic inductive coupling based wireless power transmission intended for the real-time measurement of rotor characteristics of electrical machines. The technology is based on dynamic inductive power transmission using three series-connected receivers on the secondary side. The paper summarizes the key system features and discusses optimization steps to maximize the device efficiency. The technical description includes the design of both coupling elements, and power electronics and explains power transmission and communication principles. The functionality of the proposed system is verified by developed device prototype embedded into 270kW permanent magnets synchronous generator