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A Study on the development of Aerostructures Design for Assembly guidelines and their effective use to proactively identify opportunities for improvement in mitigating common defects of the Aerostructures Assembly.

GITAM School of Technology, Hyderabad-Mani Rathinam Rajamani, Eshwaraiah Punna
  • Technical Paper
  • 2020-01-0009
To be published on 2020-03-10 by SAE International in United States
An Aircraft’s assembly process plays a vital part in its design, development and production phases and contributes to about half of the Total cost spent in its entire product lifecycle. DFA principles have been one of the proven effective methodologies in Automotive and Process industries. Use of DFA principles have resulted in proactively simplifying and optimizing engineering designs with reduced product costs, and improved inefficiencies in product design and performance. Standardization of Assembly guidelines is vital for “Design and Build” and “Build-To-Print” manufacturing supplier organizations. However, Standardizing design methodologies, through use of proven tools like Advanced Product Quality Planning, (APQP) are still in the initial stages in Aerospace part and process design processes. Thus, there is a tremendous opportunity for research on the application of the existing DFA guidelines to optimize Engineering Aerospace Assembly processes aiming to simplify, standardize design methodologies by building on existing industry practices which have a common platform for design communication and are easy to adopt within the existing process/systems. This technical paper is to discuss the framework for application of…
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Optimization and Numerical Simulation Applied to Design of Stamping Dies

Federal University of Sao Joao del Rei – UFSJ-Otavio Andrade, Marcio Eduardo Silveira
  • Technical Paper
  • 2019-36-0142
Published 2020-01-13 by SAE International in United States
The stamping process is commonly used, it is easily found in vehicles manufacturing. The stamping tool is composed by elements such as: die, punch, drawbeads and blankholder. The objective of this paper is to improve the structural stiffness and to reduce the weight of die through numerical optimization. Usually are used standardized stamping tool's parts that follows standard guidelines. The only part of stamping tool considered in the methodology was the die, other parts like punch and blankholder can also be optimized. A vehicle hood was designed in CAD and after that it was exported to CAE to start the simulations, the first step was the die generation. After that, a stamping process was simulated and the contact forces in the die were extracted and then applied in the control volume designed in CAD. Finally, the constraints, objectives and parameters were changed, so the topological optimization was generated. The results were interpreted and a layout were design in CAD following the pattern given by the optimization. Two different load cases are applied to the die…
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Comparison between the WLTC and the FTP-75 driving cycles applied to a 1.4 L light-duty vehicle running on ethanol

Federal University of Santa Maria-Maria F. P. Mazer, Leonardo S. Hatschbach, Igor R. dos Santos, Juliano P. Silveira, Roberto A. Garlet, Mario E. S. Martins, Macklini Dalla Nora
  • Technical Paper
  • 2019-36-0144
Published 2020-01-13 by SAE International in United States
The forecast scenarios regarding the environmental pollution raises a question whether the current vehicle emission certification is reliable enough to assure fleet agreement with the legal limits. Type approval tests have been performed on chassis dynamometer in order to evaluate the emission factors and fuel consumption for passenger cars. Standardized procedures such as the FTP-75 proposed in the United States (currently incorporated in the Brazilian legislation) and the Worldwide harmonized Light vehicles Test Cycle (WLTC), a transient driving cycle model designed by the European Union to overcome the shortcomings of the New European Driving Cycle (NEDC), are discussed in this paper. Both cycles were performed in a chassis dynamometer with a flex-fuel passenger car running on ethanol blend (E92W08). The driver, vehicle and fuel were kept constant so the comparison between the cycles would not be compromised. The vehicle chosen was a 1.4 dm3 displaced volume FIAT sedan with maximum power of 60 kW at 5500 rpm and maximum torque of 122 Nm at 2250 rpm. The cycle dynamics and the engine operation points were…
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Unsettled Domains Concerning Autonomous System Validation and Verification Processes

EllectroCrafts Aerospace-Fabio Alonso da Silva
  • Research Report
  • EPR2019012
Published 2019-12-30 by SAE International in United States
The Federal Aviation Administration (FAA) and the Department of Transportation’s (DOT’s) National Highway Traffic Safety Administration (NHTSA) face similar challenges regarding the regulation of autonomous systems powered by artificial intelligence (AI) algorithms that replace the human factor in the decision-making process. Validation and verification (V&V) processes contribute to implementation of correct system requirements and the development life cycle - starting with the definition of regulatory, marketing, operational, performance, and safety requirements. The V&V process is one of the steps of a development life cycle starting with the definition of regulatory, marketing, operational, performance, and safety requirements. They define what a product is, and they flow down into lower level requirements defining control architectures, hardware, and software. The industry is attempting to define regulatory requirements and a framework to gain safety clearance of such products. This report suggests a regulatory text and a safety and V&V approach from an aerospace engineering perspective assessing the replacement of the human driver from the decision-making role by a computational system. It also suggests an approach where aerospace guidelines can…
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Unsettled Topics Concerning the Field Testing of Automated Driving Systems

Bob McQueen and Associates-Bob McQueen
  • Research Report
  • EPR2019009
Published 2019-12-19 by SAE International in United States
Automated driving systems (ADS) have the potential to revolutionize transportation. Through the automation of driver functions in the application of advanced technology within the vehicle, significant improvements can be made to safety, efficiency, user experience, and the preservation of the environment. According to the US Department of Transportation [1], there are more than 1,400 cars, trucks, buses, and other vehicles being tested by more than 80 companies across the USA. Implementation of ADS technology is well advanced, with many sites across the USA incorporating automated vehicles (AVs) into wider programs to apply advanced technology to transportation. Discussions with the public sector’s implementing agencies suggest that one of the barriers to faster progress lies in the lack of consistent and standardized field-testing protocols. This report looks at the state of the art of field testing for ADS and identifies areas for improved consistency and standardization. It will define the problem to be addressed by AVs and the challenges associated with the introduction of such vehicles and open-road situations. In particular, the report will look at the…
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Fundamentals of GD&T 2018 3-day

  • Professional Development
  • ET1920024
Published 2019-12-03

This course teaches the terms, rules, symbols, and concepts of GD&T as prescribed in the ASME Y14.5-2018 Standard.

This course offers an in-depth explanation of geometric tolerancing symbols, their tolerance zones, applicable modifiers, common applications, and verification principles. The class includes a comparison of GD&T to the directly toleranced dimensioning method; Rules #1 and #2; form and orientation controls; tolerance of position; runout and profile controls. Newly acquired learning is reinforced throughout the class with more than 150 practice problems.  

Each attendee receives a Fundamentals of Geometric Dimensioning and Tolerancing 2018,  Using Critical Thinking Skills textbook by Alex Krulikowski (Based on the ASME Y14.5-2018)

Students who attend courses like this one walk away with more than knowledge - they gain on-the-job skills because the learning materials are performance-based and taught by industry professionals.

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V2X Standardization in Over-the-Air Solution

Elektrobit India-Pavithra Kumaraswamy
  • Technical Paper
  • 2019-28-2435
Published 2019-11-21 by SAE International in United States
Today in-vehicle software is growing significantly resulting into increase in importance of over-the-air software/firmware updates dramatically.Various suppliers are providing the update-over-the-air solution in the automotive sector. Due to limited standardization in solution, each supplier needs more customization for specific customer.This paper is to bring in the required standardization in V2X resulting into ‘vehicle on-board components’ as one solution to multiple customer.“Update over-the-air improved solution through various standardization resulting into ‘vehicle on-board components’ as the product”
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AS5553C, Counterfeit Electrical, Electronic, and Electromechanical (EEE) Parts; Avoidance, Detection, Mitigation, and Disposition Verification Criteria

G-19C Standards Compliance Verification
  • Aerospace Standard
  • AS6462C
  • Current
Published 2019-11-14 by SAE International in United States
This document is intended for use during audits to the requirements of AS5553C. It may be used by all contracting organizations that procure EEE parts, whether such parts are procured directly or integrated into electronic assemblies or equipment as guidance for evaluating compliance to AS5553C.
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Weighted Distance Metrics for Data Association Problem in Multi-Sensor Fusion

Dongfeng Motor Corporation Technical Center-Darui Zhang, Ning Bian, Daihan Wang, Hang Yang, Xinjuan Tuo
Published 2019-11-04 by SAE International in United States
Traffic accidents are the world's leading threat to human safety. The majority of traffic accidents are due to human error. Advanced Driver Assist Systems (ADAS) can reduce human error, therefore has the potential to effectively improve the safety of road traffic. The perception module in an ADAS understands the surrounding environment of the subject vehicle and therefore is the prerequisite for planning and control. Due to the limitation of computational constrain of Electronic Control Units, ADAS system commonly uses object-leveled multi-sensor fusion, in which raw data is processed to detect objects at the sensory level. In multi-sensor fusion, the task of assigning new observations to the existing tracks, known as Data Association problem, requires distance metrics to present the similarity between tracks. In the literature, metrics, such as standardized Euclidean distance and Mahalanobis distance has been used. Though accounting for the scale and correlation of the data, the existing metrics cannot account for the importance of each feature in predicting their dissimilarity. As a result, weighting factors are added to the distance metrics and they…
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SAE STANDARDS NEWS

Automotive Engineering: November/December 2019

  • Magazine Article
  • 19AUTP11_06
Published 2019-11-01 by SAE International in United States

SAE International's Global Ground Vehicle Standards group is planning a Legislation, Regulation, Enforcement Workshop in collaboration with the Washington Area New Automobile Dealers Association (WANADA) scheduled for January 21, 2020. This special event will be held just ahead of the 2020 SAE Government/Industry Meeting (GIM) in Washington, D.C., which is set for January 22-24.

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