scholarly journals A network tool to analyse and improve robustness of system architectures

2020 ◽  
Vol 6 ◽  
Author(s):  
Giota Paparistodimou ◽  
Alex Duffy ◽  
Robert Ian Whitfield ◽  
Philip Knight ◽  
Malcolm Robb
Keyword(s):  
System Architecture ◽  
Engineering System ◽  
System Architectures ◽  
Alternative System ◽  
Initial Stage ◽  
Threshold Criterion ◽  
Network Generator ◽  
Key Features ◽  
Cost Efficient ◽  
Source And Sink

The architecture of a system is decided at the initial stage of the design. However, the robustness of the system is not usually assessed in detail during the initial stages, and the exploration of alternative system architectures is limited due to the influence of previous designs and opinions. This article presents a novel network generator that enables the analysis of the robustness of alternative system architectures in the initial stages of design. The generator is proposed as a network tool for system architectures dictated by their configuration of source and sink components structured in a way to deliver a particular functionality. Its parameters allow exploration with theoretical patterns to define the main structure and hub structure, vary the number, size, and connectivity of hub components, define source and sink components and directionality at the hub level and adapt a redundancy threshold criterion. The methodology in this article assesses the system architecture patterns through robustness and modularity network based metrics and methods. Two naval distributed engineering system architectures are examined as the basis of reference for the simulated networks. The generator provides the capacity to create alternative complex system architecture options with identifiable patterns and key features, aiding in a broader explorative and analytical, in-depth, time and cost-efficient initial design process.

ISO 26262 Concept Phase Analysis on Distributed Electro-Hydraulic Braking System: The Influence of System Architecture on ASIL Decomposition

2014 ◽  
Author(s):  
Zhizhong Wang ◽  
Liangyao Yu ◽  
Ning Pan ◽  
Lei Zhang ◽  
Jian Song
Keyword(s):  
System Architecture ◽  
Event Analysis ◽  
Automotive Safety ◽  
System Architectures ◽  
Iso 26262 ◽  
Braking System ◽  
Safety Integrity Level ◽  
Actuator System ◽  
Hazardous Event ◽  
Wire System

The Distributed Electro-hydraulic Braking system (DEHB) is a wet type brake-by-wire system. As a safety critical automotive electrical and/or electronic (E/E) system, DEHB shall be designed under the guideline of ISO 26262 in order to avoid unreasonable risk due to the malfunctions in the item. This paper explores how the Automotive Safety Integrity Level (ASIL) decomposition in the concept phase is influenced by the system architectures of DEHB. Based on a typical hazardous event, analysis on DEHB with the same system architecture as the Electro-mechanical Braking system (EMB) is carried out, which is taken as the basis for comparison. Two types of DEHB with different system architectures are then analyzed. Results show that the adoption of hydraulic backup enables ASIL decomposition in the pedal unit. The adoption of both hydraulic backup and normally open balance valves offers the opportunity to perform ASIL decomposition in the brake actuator system of DEHB.

Architectures of Concurrent Engineering System for Composites

1996 ◽  
Author(s):  
Jian Zhang ◽  
H. Thomas Hahn
Keyword(s):  
Concurrent Engineering ◽  
Life Cycle Cost ◽  
Engineering System ◽  
Functional Requirements ◽  
System Architectures ◽  
Composite Manufacturing ◽  
Manufacturing Enterprises ◽  
System Requirements ◽  
Points Of View ◽  
Process Productivity

Abstract The demand for the better quality products with shorter lead-time and lower life-cycle cost forces the manufacturing enterprises all around the world to optimize their production strategies from both enterprise engineering and enterprise operation respectively. This paper addresses the architectural issue of applying the Concurrent Engineering (CE) approach in the composite manufacturing area. It first discussed briefly the characteristics of composite manufacturing process to examine the feasibility and possibility of applying the CE approach to improve its process productivity and product quality. Then the functional requirements for a concurrent engineering system for composites (CESC) were defined from both operational and architectural points of view. Finally, the integrated infrastructure based system architectures for the CESC were presented in accordance with the physical system requirements, and so were the associated and currently conducted R&D focuses for the system.

scholarly journals A Design Technique for Adapting Number and Boundaries of Reconfigurable Modules at Runtime

2009 ◽  
Vol 2009 ◽  
pp. 1-10 ◽  
Author(s):  
Thilo Pionteck ◽  
Roman Koch ◽  
Carsten Albrecht ◽  
Erik Maehle
Keyword(s):  
System Architecture ◽  
Design Tool ◽  
Design Flow ◽  
Design Tools ◽  
System Architectures ◽  
Flexible System ◽  
Reconfigurable System ◽  
Communication Needs ◽  
On Chip ◽  
Architecture And Design

Runtime reconfigurable system-on-chip designs for FPGAs pose manifold demands on the underlying system architecture and design tool capabilities. The system architecture has to support varying communication needs of a changing number of processing units mapped onto diverse locations. Design tools should support an arbitrary placement of processing modules and the adjustment of boundaries of reconfigurable regions to the size of the actually instantiated processing modules. While few works address the design of flexible system architectures, the adjustment of boundaries of reconfigurable regions to the size of the actually instantiated processing modules is hardly ever considered due to design tool limitations. In this paper, a technique for circumventing this restriction is presented. It allows for a rededication of the reconfigurable area to a different number of individually sized reconfigurable regions. This technique is embedded in the design flow of a runtime reconfigurable system architecture for Xilinx Virtex-4 FPGAs. The system architecture will also be presented to provide a realistic application example.

Knowledge systems for financial advice

1992 ◽  
Vol 7 (3) ◽  
pp. 215-249 ◽  
Author(s):  
V. Mital
Keyword(s):  
Real World ◽  
System Architecture ◽  
Knowledge Systems ◽  
System Architectures ◽  
Financial Advice ◽  
The Real ◽  
Financial Domain ◽  
Case Based

AbstractThe financial domain has seen considerable knowledge Systems activity. Some of the efforts have resulted in deployable Systems, but many others have met with much less success. Commentators have attempted to discern broad, universal indicators which explain or predict success. More recently, however, it has become clearer that a principal cause of the difficultes encountered is the incongruence between the real world task and the System architecture employed by developers. Proceeding from the latter perspective, this paper concerns itself with knowledge Systems for the provision of investment related financial advice. The various tasks involved are differentiated and correlated to the System architectures employed by developers. It is seen that while simple rulebased Systems suffice for some tasks, others indicate the need for techniques such as Case-Based Design.

scholarly journals Thermal Management System Architecture for Hydrogen-Powered Propulsion Technologies: Practices, Thematic Clusters, System Architectures, Future Challenges, and Opportunities

Energies ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 304
Author(s):  
Akshay Nag Srinath ◽  
Álvaro Pena Pena López ◽  
Seyed Alireza Miran Miran Fashandi ◽  
Sylvain Lechat ◽  
Giampiero di di Legge ◽  
...  
Keyword(s):  
Thermal Management ◽  
System Architecture ◽  
Management System ◽  
Historical Review ◽  
System Level ◽  
Disruptive Technology ◽  
System Architectures ◽  
Critical Areas ◽  
Thermal Management System ◽  
Challenges And Opportunities

The thermal management system architectures proposed for hydrogen-powered propulsion technologies are critically reviewed and assessed. The objectives of this paper are to determine the system-level shortcomings and to recognise the remaining challenges and research questions that need to be sorted out in order to enable this disruptive technology to be utilised by propulsion system manufacturers. Initially, a scientometrics based co-word analysis is conducted to identify the milestones for the literature review as well as to illustrate the connections between relevant ideas by considering the patterns of co-occurrence of words. Then, a historical review of the proposed embodiments and concepts dating back to 1995 is followed. Next, feasible thermal management system architectures are classified into three distinct classes and its components are discussed. These architectures are further extended and adapted for the application of hydrogen-powered fuel cells in aviation. This climaxes with the assessment of the available evidence to verify the reasons why no hydrogen-powered propulsion thermal management system architecture has yet been approved for commercial production. Finally, the remaining research challenges are identified through a systematic examination of the critical areas in thermal management systems for application to hydrogen-powered air vehicles’ engine cooling. The proposed solutions are discussed from weight, cost, complexity, and impact points of view by a system-level assessment of the critical areas in the field.

Process for the Validation of System Architectures against Requirements

2013 ◽  
pp. 209-229
Author(s):  
André Pflüger ◽  
Wolfgang Golubski ◽  
Stefan Queins
Keyword(s):  
System Architecture ◽  
Unified Modeling Language ◽  
Modeling Language ◽  
Work Effort ◽  
System Architectures ◽  
Implementation Phase ◽  
Unified Modeling ◽  
System Requirements ◽  
The One ◽  
Model Affect

The development of systems consisting of hardware and software is a challenging task for the system architect. On the one hand, he has to consider an increasing number of system requirements, including the dependencies between them for designing the system architecture; on the other hand, he has to deal with a shortened time-to-market period and requirements changes of the customers up to the implementation phase. This chapter presents a process that enables the architect to validate the system architecture against the architecture-relevant requirements. The process is part of the system design phase and can be integrated in the iterative design of the system architecture. In order to keep track of all requirements, including their dependencies, the architect clusters the requirements according to architecture-specific aspects, the so-called validation targets. For each target he defines examinations processes and check criteria to define the validation status. If all targets are valid, i.e., all check criteria are met by the result of the examination processes, the system architecture itself is valid. Instead of formal validation techniques like model checking, the approach prefers simulations for the examination processes. The approach uses model-based documentation based on the Unified Modeling Language (UML). All data required for the simulations is part of an UML model and extracted to configure and run the simulations. Therefore, changes in the model affect the validation result directly. The process supports the architect in building a system architecture that fulfills the architecture-relevant requirements, and it supports the architect in analyzing the impacts after requirements or architecture changes. A tool facilitates the work effort of the architect by partly automating the major process steps.

Marine Inertial Navigation and Stabilization System. 20 Years of Development

2020 ◽  
Vol 28 (3) ◽  
pp. 122-131
Author(s):  
B.L. Sharygin ◽  
Keyword(s):  
System Architecture ◽  
Navigation System ◽  
Inertial Navigation System ◽  
Inertial Navigation ◽  
Stabilization System ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Reliability Parameters ◽  
History Of ◽  
Key Features

The paper presents the history of creation and development of Ladoga-M marine inertial navigation and stabilization system (INSS). The major steps of testing and modifications are covered. The system architecture and key features are given: semianalytical inertial navigation system, rotation of azimuth platform, single degree of freedom floating gyros, accelerometer triad, application of Kalman type filter, use of Baget computer. INSS reliability parameters by the results of operation in real conditions are demonstrated.

scholarly journals Selecting system architecture: What a single industrial experiment can tell us about the traps to avoid when choosing selection criteria

2016 ◽  
Vol 30 (3) ◽  
pp. 250-262 ◽  
Author(s):  
Marie-Lise Moullec ◽  
Marija Jankovic ◽  
Claudia Eckert
Keyword(s):  
System Architecture ◽  
Selection Criteria ◽  
Architecture Design ◽  
System Architectures ◽  
Industrial Experiment ◽  
Lack Of Information ◽  
Conflicting Objectives ◽  
Support Tools ◽  
Audio Recordings ◽  
System Architecture Design

AbstractDecisions related to system architecture are difficult because of fuzziness and lack of information combined with often-conflicting objectives. We organized an industrial workshop with the objective of choosing 5 out of 800 architectures. The first step, the identification of selection criteria, proved to be the greatest challenge. As a result, designers selected system architectures that did not satisfy them without being able to explain why. It appeared that most of the difficulties faced by the designers came from the criteria used for architecture selection. This study aims to identify what made the selection criteria difficult to use. The audio recordings of the workshop were transcribed and analyzed in order to identify the obstacles related to the definition and the use of selection criteria. The analysis highlights two issues: the interdisciplinarity of system architecture makes criteria interdependent and the lack of information makes it impossible to define an exhaustive set of criteria. Finally, this study provides recommendations for selecting appropriate selection criteria and insights for future selection support tools dedicated to system architecture design.

Development of Virtual Simulations for Medical Team Training: An Evaluation of Key Features

2018 ◽  
Vol 7 (1) ◽  
pp. 261-266 ◽  
Author(s):  
Jessica Howe ◽  
Joseph Puthumana ◽  
Daniel Hoffman ◽  
Rebecca Kowalski ◽  
Danielle Weldon ◽  
...  
Keyword(s):  
Team Training ◽  
Performance Outcomes ◽  
Future Research ◽  
Medical Team ◽  
Assessment Task ◽  
Effective Cost ◽  
Virtual Simulations ◽  
Technical Specifications ◽  
Key Features ◽  
Cost Efficient

Medical team training (MTT) conducted in a virtual environment fosters growth in cognitive, technical, and clinical aptitudes while offering advantages of flexibility, cost, and ease of scheduling over traditional high- fidelity simulations. Growing technology facilitates innovations to improve the ability to emulate roles, rules, resources, and fidelity. Our objective was to evaluate elements of key features that inform technical specifications for virtual simulations. A narrative review included 27 articles as relevant to elaborate on five key features identified as critical to development of virtual environments for MTT: automated assessment, task fidelity, interface modality, virtual teammates, and adaptability. Designers continue to improve the technology of virtual reality to create better and more enhanced training modules. We must better understand how variances in simulation features impacts performance outcomes and learned behavior. Future research can more deeply examine features beyond the five reviewed here to guide development of effective, cost-efficient virtual simulations for MTT.

Sign in / Sign up

Export Citation Format

Share Document