Design Considerations of Subsea HIPPS Architectures Evaluating Functional Safety and Reliability for HPHT Application

2016 ◽  
Author(s):  
Angel Malave ◽  
Jens Gronstedt
Keyword(s):  
Functional Safety ◽  
Design Considerations ◽  
Safety And Reliability

EQUITAS: A tool-chain for functional safety and reliability improvement in automotive systems

2016 ◽  
Vol 47 ◽  
pp. 252-261 ◽  
Author(s):  
Réda Nouacer ◽  
Manel Djemal ◽  
Smail Niar ◽  
Gilles Mouchard ◽  
Nicolas Rapin ◽  
...  
Keyword(s):  
Functional Safety ◽  
Tool Chain ◽  
Automotive Systems ◽  
Reliability Improvement ◽  
Safety And Reliability

scholarly journals Functional safety requirements of traction inverter in accordance to ISO 26262

2020 ◽  
Vol 184 ◽  
pp. 01062
Author(s):  
R Bhavana ◽  
Omsekhar Indela ◽  
Mohammed Sajid Yaragatti
Keyword(s):  
Short Circuit ◽  
Functional Safety ◽  
Iso 26262 ◽  
Safety Requirements ◽  
Automotive Systems ◽  
Safety And Reliability ◽  
Electric Traction ◽  
Electronic Controller ◽  
Short Circuit Fault ◽  
Electronic Sensors

With the improvement and development in the automotive, the safety related aspects are also becoming more important. Hence there is a stringent demand for the Functional Safety and reliability. In these years, most of the vehicles are made with electrical and electronic components and systems which include lots of Electronic Controller Units (ECUs), electronic sensors, bus systems with coding. Due to the complexity in application of these electrical, electronics and programmable electronics, it is necessary to analyze the potential risk of malfunction for automotive systems. Thus, ISO 26262 has been introduced for automotive electrical/electronic (E/E) systems which ensure the complete safety installation of all ECUs, E/E systems its technical as well as management issues. In this paper, functional safety in accordance with ISO 26262 Part 3 of an electric traction inverter is done, the Functional safety report is generated in MEDINI TOOL and the short circuit fault of traction inverter is considered for Functional safety using MATLAB/SIMULINK.

scholarly journals ISO 26262 - The Relevance and Importance of Qualitative and Quantitative Methods for Safety and Reliability Issues Regarding the Automotive Industry

2010 ◽  
Vol 14-15 (1) ◽  
pp. 165-176
Author(s):  
Marco Schlummer ◽  
Dirk Althaus ◽  
Andreas Braasch ◽  
Arno Meyna
Keyword(s):  
Risk Assessment ◽  
Automotive Industry ◽  
Quantitative Methods ◽  
Hazard Analysis ◽  
Functional Safety ◽  
Automotive Safety ◽  
Iso 26262 ◽  
Qualitative And Quantitative ◽  
Qualitative And Quantitative Methods ◽  
Safety And Reliability

ISO 26262 - The Relevance and Importance of Qualitative and Quantitative Methods for Safety and Reliability Issues Regarding the Automotive IndustrySafety and reliability are key issues of today's and future automotive developments, where the involved companies have to deal with increasing functionality and complexity of software-based car functions. New functionalities cannot only be found in the area of driver assistance - most of the new car functions are and will be safety related as for example in vehicle dynamics control or active and passive safety systems. The development and integration of those functions will strengthen the need of safe processes during the system development. The new upcoming automotive standard on functional safety (ISO 26262), which is derived from the generic functional safety standard IEC 61508 to comply with the specific needs to the application sector of E/E-systems in road vehicles, will provide guidance to avoid the increasing risks from systematic faults and random hardware faults by providing feasible processes and requirements. It is evident that aspects and methods of the safety and reliability engineering are implemented and suited methods are performed in the development process at an early stage. This is one of the requirements of the new ISO 26262, which introduces a so called automotive safety lifecycle to handle all those activities that are necessary to guarantee the functional safety of automotive E/E-systems. In the following, a brief overview of the upcoming automotive standard, its new safety life cycle and the connected activities in order to ensure functional safety for safety related systems will be given. The main aim of this paper is to show the relevance and importance of one of the major tasks within the ISO 26262: the process of the hazard analysis and risk assessment as it is currently performed in the automotive industry. With the help of an example from the automotive sector, the basic steps of this method to determine the automotive safety integrity level (ASIL) are explained. Depending on the ASIL, safety requirements need to be derived as a result of the new standard regarding safety integrity attributes. Furthermore, the connection of the automotive functional safety process with methods for qualification and quantification of safety and reliability issues will be explained in this paper. The Fault Tree Analysis will be used to exemplify one of these methods which are applied subsequent to the hazard analysis and risk assessment and which make a contribution to the validation and verification of the safety process.

scholarly journals 2A2-I08 Functional Safety Analysis of the Dependable Robotic Cart(Robotics with Safety and Reliability)

2013 ◽  
Vol 2013 (0) ◽  
pp. _2A2-I08_1-_2A2-I08_3
Author(s):  
Kiyoshi FUJIWARA ◽  
Daichi MIZUGUCHI ◽  
Geoffrey BIGGS ◽  
Ryo HANAI ◽  
Keiju ANADA
Keyword(s):  
Safety Analysis ◽  
Functional Safety ◽  
Safety And Reliability

Morphological behavior of compatibilized ternary blends prepared by mechanical mixing

1993 ◽  
Vol 51 ◽  
pp. 1200-1201
Author(s):  
S.D. Smith ◽  
R.J. Spontak ◽  
D.H. Melik ◽  
S.M. Buehler ◽  
K.M. Kerr ◽  
...  
Keyword(s):  
Interfacial Adhesion ◽  
Diblock Copolymers ◽  
Ternary Blends ◽  
Mechanical Mixing ◽  
Design Considerations ◽  
Covalently Bonded ◽  
Homopolymer Blends ◽  
Emulsifying Agent ◽  
Surface Active ◽  
Low Entropy

When blended together, homopolymers A and B will normally macrophase-separate into relatively large (≫1 μm) A-rich and B-rich phases, between which exists poor interfacial adhesion, due to a low entropy of mixing. The size scale of phase separation in such a blend can be reduced, and the extent of interfacial A-B contact and entanglement enhanced, via addition of an emulsifying agent such as an AB diblock copolymer. Diblock copolymers consist of a long sequence of A monomers covalently bonded to a long sequence of B monomers. These materials are surface-active and decrease interfacial tension between immiscible phases much in the same way as do small-molecule surfactants. Previous studies have clearly demonstrated the utility of block copolymers in compatibilizing homopolymer blends and enhancing blend properties such as fracture toughness. It is now recognized that optimization of emulsified ternary blends relies upon design considerations such as sufficient block penetration into a macrophase (to avoid block slip) and prevention of a copolymer multilayer at the A-B interface (to avoid intralayer failure).

Theoretical And Practical Design Considerations for Ultra-High Resolution Electron Lenses

1980 ◽  
Vol 38 ◽  
pp. 266-269
Author(s):  
Y. Harada ◽  
K. Tsuno ◽  
Y. Arai
Keyword(s):  
Optical Properties ◽  
High Resolution ◽  
Chromatic Aberration ◽  
Point Of View ◽  
Pole Piece ◽  
Axial Field ◽  
Design Considerations ◽  
Resolution Electron ◽  
Practical Design ◽  
Peak Flux

Magnetic objective lenses, from the point of view of pole piece geometry, can he roughly classified into two types, viz., symmetrical and asymmetrical. In the case of the former, the optical properties have been calculated by several authors1-3) and the results would appear to suggest that, in order to reduce the spherical and chromatic aberration coefficients, Cs and Cc, it is necessary to decrease the half-width value of the axial field distribution and to increase the peak flux density. The expressions for either minimum Cs or minimum Cc were presented in the form of ‘universal’ curves by Mulvey and Wallington4).

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