Browse Topic: Blockchain

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testing tasks 2 jms test citSAE-PP-004629/28/2021
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SintzADMIN, Jeneane, SintzUSER, Jeneane
021 - Development of a 0D Model Starting from Different RANS CFD Tumble Flow Fields in Order to Predict the Turbulence Evolution at Ignition TimingSAE-PP-001501/25/2021
aster combustion and lower cycle-to-cycle variability are mandatory tasks for naturally aspirated engines to reduce emission levels and to increase engine efficiency. The promotion of a stable and coherent tumble structure is considered as one of the best way to promote the in-cylinder turbulence and therefore the combustion velocity. During the compression stroke the tumble vortex is deformed, accelerated and its breakdown in smaller eddies leads to the turbulence enhancement process. The prediction of the final level of turbulence for a particular engine operating point is crucial during the engine design process because it represents a practical comparative means for different engine solutions. The tumble ratio parameter value represents a first step toward the evaluation of the turbulence level at ignition time, but it has an intrinsic limit. The tumble ratio parameter represents the value of the angular velocity of a single macro vortex, while the flow-field is often characterized by multiple vortexes, sometimes some rotating and some counter-rotating. The idea at the basis of the paper is: To develop a quasi-predictive 0D model for defining the final mean level of the turbulence at the ignition time. The model is fed by the curtain intake valve mass flow rate and the intake valve lift trend. In order to validate the 0D model the results were compared versus 3D CFD results. To extract from a 3D CFD flow field at IVC the type and the number of the vortexes. The 3D CFD RANS simulations were performed by AVL Fire code v. 2010. To demonstrate through some 3D CFD results that the flow field structure was a function only of the engine type and the load condition. Finally the flow field structure could be used in the 0D model on varying the engine speeds as a means of improvement of the model prediction capability.
Mutagaana, Festo
Progressive Disintermediation of the Commercial Aviation Industry Ecosystem2019-01-13303/19/2019
The re-invention of the global aviation industry is well underway. This dramatic change is being achieved through the use of emergent technology to facilitate a progressive disintermediation of traditional aviation business solutions and services. This progressive disintermediation will continue unabated as this technology is adopted and deployed within the aviation industry. The challenge and opportunity is to whom will lead this re-invention and how will it be accomplished. The integrated use of rapidly evolving technology (Blockchain, IoT, Artificial Intelligence, 5G Cellular Technology and Mobile Edge Computing) is facilitating an integrated more industry cooperative approach enabling this progressive disintermediation. The Boeing Company and other industry leaders are challenging themselves and others by embracing this re-inventive opportunity and by cooperatively learning from peer industries, then adapting the knowledge for applicability to the aviation industry to reform or re-define the aviation ecosystem. Boeing has conducted several proof of concepts with these respective technology sets to validate the efficacy of the technology and to establish a baseline understanding of the interoperability opportunity. What if we do nothing? How long can we wait? Three to five years and then the progressive disintermediation of the industry sectors will have formed new ecosystems with transformative business relationships leveraging the integrated capabilities of these five emergent technologies.
Rencher, Robert John
Risk Analysis of Blockchain Application for Aerospace Records Management2019-01-13443/19/2019
Blockchain as a technology has been successfully deployed in the financial industry. As the technology continues to mature, there are opportunities to use this to solve operational challenges in Aerospace. One of the common use cases is replacing paper records as a proof of compliance with a blockchain enabled distributed ledger. Commonly available open source blockchain frameworks have security ingrained in the components. However, replacing paper records with a blockchain based distributed ledger will require investigation of potential risks involved in the end to end usage of this technology for records management. The objective of this paper is to elucidate potential risks in an aviation record management workflow environment enabled by blockchain and suggest requirements to mitigate the risks. In addition requirements for Blockchain based systems will be proposed, which will guarantee minimum functional requirements like Protection of confidential information Integrity of the information in a record Safeguards against unauthorized access The potential gaps are understood using an illustrative end to end blockchain based process along with their conceptual high level intermediate steps. For example: Authenticated trusted digital identities of the participants whose transactions are recorded in distributed ledgers Trusted source which distributes these identities and has a mechanism to update, revoke and safely secure these identities Trusted methods to ensure detection if the digital identities are compromised Trusted method to demonstrate controlled authorization process for digital identities as per access control rules Trusted methods to demonstrate the generation of accounting logs
Kar, Satyanarayan, Kasimsetty, Vinay, Barlow, Susan, Rao, Sujay
Autonomous Vehicle Engineering: August 201818AVEP088/2/2018
Editorial V2Reality Blockchain Unchained! The weird world of cryptocurrency exists because of the intense mathematics of blockchain technology. The mobility sector is looking beyond Bitcoin to put blockchain to work in potentially game-changing ways. Are Blockchain and 'Smart Contracts' the Secure Future? Legal risk and reward of blockchain and smart contracts as a prescription for automotive applications Software Building Blocks for AV Systems Elektrobit's unique software framework is designed to smooth development of automated driving functions. Cyber Security Goes Upstream The first cloud-based solution for connected vehicles was born in Israel and is now pilot testing at global OEMs. Electronic Architectures Get Smart Upgradable, scalable and powerful new architectures will help enable data-hungry connected, autonomous vehicles. Aptiv's VP of Mobility Architecture explains. Reliability, Safety, and AV Development An overemphasis on safety without a robust and equivalent reliabili-ty process and organization will result in errors that could be catastrophic. Understanding the Self-Driving Revolution A new book on autonomy from one of the ultimate insiders. Software Rewrites the Rules Revenue streams and business models are changing as more vehicle functions move to software. Blackberry QNX's John Wall explains. Truck Platoons on the Move Trials increase to determine if fuel economy, safety improvements make platooning worthwhile-but issues still need to be resolved. Defanging Driverless Cars A pioneering program gives everyday people the chance to ride in an automated vehicle on public roads.
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