Analog fault simulation in automotive radar 77 Ghz circuit for safety requirements

Nowadays, many electronics are being embedded in road vehicles to assist drivers while they are conducting, and potentially, to prevent accidents. One of the most popular technologies onboarded in vehicles is radar, which detects targets with good precision. However, all systems embedded in cars mus...

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Main Author: Sanches, Felipe Souza
Other Authors: Matemaattis-luonnontieteellinen tiedekunta, Faculty of Sciences, Fysiikan laitos, Department of Physics, Jyväskylän yliopisto, University of Jyväskylä
Format: Master's thesis
Language:eng
Published: 2023
Subjects:
Online Access: https://jyx.jyu.fi/handle/123456789/89119
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author Sanches, Felipe Souza
author2 Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä
author_facet Sanches, Felipe Souza Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä Sanches, Felipe Souza Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä
author_sort Sanches, Felipe Souza
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description Nowadays, many electronics are being embedded in road vehicles to assist drivers while they are conducting, and potentially, to prevent accidents. One of the most popular technologies onboarded in vehicles is radar, which detects targets with good precision. However, all systems embedded in cars must go through safety checks, because during the device’s life cycle, it can present random failures. Thus, to reduce and mitigate the risks of electronic failures, some methods must be applied following safety guidelines, such as fault simulation. This is important because, due to safety reasons, it is assumed all faults are dangerous, and will generate failures in the system. However, by simulating, it can be seen which type of failures the device presents and the precise distribution of “dangerous” and “safe” faults. Hence, in the radar device, inside the transceiver block, “bridges” and “open” faults were injected in both voltage regulator and frequency doubler blocks. To model both “bridge” and “open”, a 10Ω and a 1GΩ resistor were used. Each fault was injected to interact with each terminal of all component elements inside the studied blocks. Legato, a Cadence simulation tool, was used to execute those simulations. For the voltage regulator, 2981 faults were systematically simulated, and 3 types of failures were identified, such as undervoltage, overvoltage, and oscillation outside the safety voltage range. Besides that, 78.87% of faults were “safe” and did not affect the main operation of the voltage regulator. For the frequency doubler, the simulation software presented an error to execute the high-frequency analysis. However, considering this block demands high computational power for each simulation, and in total is expected to simulate 4607 faults, the testbench had to be optimized. After the optimization, the single run time decreased from 45 minutes to 20 minutes. Then, once a new software version is available, fault simulations can be performed to identify the failures in the frequency doubler block.
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One of the most popular technologies onboarded in vehicles is radar, which detects targets with good precision.\nHowever, all systems embedded in cars must go through safety checks, because during the device\u2019s life cycle, it can present random failures. Thus, to reduce and mitigate the risks of electronic failures, some methods must be applied following safety guidelines, such as fault simulation. This is important because, due to safety reasons, it is assumed all faults are dangerous, and will generate failures in the system. However, by simulating, it can be seen which type of failures the device presents and the precise distribution of \u201cdangerous\u201d and \u201csafe\u201d faults.\nHence, in the radar device, inside the transceiver block, \u201cbridges\u201d and \u201copen\u201d faults were injected in both voltage regulator and frequency doubler blocks. To model both \u201cbridge\u201d and \u201copen\u201d, a 10\u03a9 and a 1G\u03a9 resistor were used. 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spellingShingle Sanches, Felipe Souza Analog fault simulation in automotive radar 77 Ghz circuit for safety requirements faults Elektroniikka Electronics 4022 simulointi turvallisuus viat tutkat kulkuneuvotekniikka simulation safety and security defects radars vehicle technology
title Analog fault simulation in automotive radar 77 Ghz circuit for safety requirements
title_full Analog fault simulation in automotive radar 77 Ghz circuit for safety requirements
title_fullStr Analog fault simulation in automotive radar 77 Ghz circuit for safety requirements Analog fault simulation in automotive radar 77 Ghz circuit for safety requirements
title_full_unstemmed Analog fault simulation in automotive radar 77 Ghz circuit for safety requirements Analog fault simulation in automotive radar 77 Ghz circuit for safety requirements
title_short Analog fault simulation in automotive radar 77 Ghz circuit for safety requirements
title_sort analog fault simulation in automotive radar 77 ghz circuit for safety requirements
title_txtP Analog fault simulation in automotive radar 77 Ghz circuit for safety requirements
topic faults Elektroniikka Electronics 4022 simulointi turvallisuus viat tutkat kulkuneuvotekniikka simulation safety and security defects radars vehicle technology
topic_facet 4022 Electronics Elektroniikka defects faults kulkuneuvotekniikka radars safety and security simulation simulointi turvallisuus tutkat vehicle technology viat
url https://jyx.jyu.fi/handle/123456789/89119 http://www.urn.fi/URN:NBN:fi:jyu-202309155140
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