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Fundamentals of Geometric Dimensioning and Tolerancing 2018: Using Critical Thinking Skills

  • Book
  • PD0220019-CB00
To be published on 2019-12-31 by SAE International in United States

The Fundamentals of Geometric Dimensioning and Tolerancing 2018 Using Critical Thinking Skills by Alex Krulikowski reflects the technical content found in the latest release of the ASME Y14.5-2018 Standard.

This book includes several key features that aid in the understanding of geometric tolerancing. Each of the textbook's 26 chapters focuses on a major topic that must be mastered to be fluent in the fundamentals of GD&T. Each topic includes a goal that is defined and supported by a set of performance objectives that include real-world examples, verification principles and methods, and chapter summaries. There are more than 260 performance objectives that describe specific, observable, measurable actions that the student must accomplish to demonstrate mastery of each goal. Learning is reinforced by completing three types of exercise problems, along with critical thinking questions that promote application of GD&T on the job. It's the most practical and easy-to-use GD&T text on the market.

**SPECIAL: Pre-Order your copy by December 31, 2019 and receive 10% off the $140 retail price.

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Unsettled Domains Concerning Autonomous System Validation and Verification Processes

EllectroCrafts Aerospace-Fabio Alonso da Silva
  • Research Report
  • EPR2019012
To be published on 2019-12-20 by SAE International in United States
The Federal Aviation Administration (FAA) and the Department of Transportations' (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. The validation and verification (V&V) processes contribute to the implementation of the correct system requirements. The V&V process is one of the steps of a development lifecycle 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. This article suggests an approach where aerospace guidelines can be used alongside ISO 26262 in order to define a viable and valuable framework for autonomous…
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Unsettled Technology Domains in Aerospace Additive Manufacturing Concerning Safety, Airworthiness, and Certification

Muelaner Engineering, Ltd.-Jody Muelaner
  • Research Report
  • EPR2019008
To be published on 2019-12-20 by SAE International in United States
Additive manufacturing (AM) is currently being used to produce many certified aerospace components. However, significant advantages of AM are not exploited due to unresolved issues associated with process control, feedstock materials, surface finish, inspection, and cost. Components subject to fatigue must undergo surface finish improvements to enable inspection. This adds cost and limits the use of topology optimization. Continued development of process models is also required to enable optimization and understand the potential for defects in thin walled and slender sections. Costs are high for powder-fed processes due to material costs, machine costs, and low deposition rates. Cost for wire-fed processes are high due to the extensive post-process machining required. In addition, these processes are limited to low-complexity features. Incremental improvements in all of these areas are being made but a step change could potentially be achieved by hybrid processes, which use wire feedstock to deposit the bulk of the part and powder for fine detail. NOTE: SAE EDGE™ Research Reports are intended to identify and illuminate key issues in emerging, but still unsettled, technologies…
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Unsettled Technology Domains in Robotics for Automation in Aerospace Manufacturing

Muelaner Engineering, Ltd.-Jody Muelaner
  • Research Report
  • EPR2019010
To be published on 2019-12-20 by SAE International in United States
Cost reduction and increasing production rate are driving automation of aerospace manufacturing. Articulated serial robots may replace bespoke gantry automation or human operations. Improved accuracy is key to enabling operations such as machining, additive manufacturing, composite fabrication, drilling, automated program development and inspection. New accuracy standards are needed to enable process- relevant comparisons between robot systems. Accuracy can be improved through calibration of kinematic and joint stiffness parameters, joint output encoders, adaptive control that compensates for thermal expansion and feed- forward control that compensates for hysteresis and external loads. The impact of datuming could also be significantly reduced through modelling and optimization. High dynamic end-effectors compensate high-frequency disturbances using inertial sensors and reaction masses. Global measurement feedback is a high-accuracy turn-key solution, but it is costly and has limited capability to compensate dynamic errors. Local measurement feedback is a mature, affordable and highly accurate technology where the robot is required to position or align relative to some local feature. Locally clamped machine tools are an alternative approach that can utilize the flexibility of industrial robots…
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Unsettled Issues in Balancing Virtual, Closed-Course, and Public-Road Testing of Automated Driving Systems

Silicon Valley Mobility-Sven Beiker
  • Research Report
  • EPR2019011
To be published on 2019-12-20 by SAE International in United States
This SAE EDGE™ Research Report identifies key unsettled issues of interest to the automotive industry regarding the challenges of determining the optimal balance for testing automated driving systems (ADS). Three main issues are outlined that merit immediate interest: First, determining what kind of testing an ADS needs before it is ready to go on the road; Second, the current, optimal, and realistic balance of simulation testing and real-world testing; Third, the challenges of sharing data in the industry. SAE EDGE™ Research Reports are preliminary investigations of new technologies. The three technical issues identified in this report need to be discussed in greater depth with the aims of, first, clarifying the scope of the industry-wide alignment needed, second, prioritizing the issues requiring resolution, and, third, creating a plan to generate the necessary frameworks, practices, and protocols. NOTE: SAE EDGE™ Research Reports are intended to identify and illuminate key issues in emerging, but still unsettled, technologies of interest to the mobility industry. The goal of SAE EDGE™ Research Reports is to stimulate discussion and work in the…
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Unsettled Topics Concerning the Field Testing of Automated Driving Systems

Bob McQueen and Associates-Bob McQueen
  • Research Report
  • EPR2019009
To be published on 2019-12-20 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, the 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 us incorporating automated vehicles (AVs) into wider programs to apply advanced technology to transportation. Discussions with public sector implementing agencies suggests 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 automated driving systems 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…
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Unsettled Issues in Determining Appropriate Modeling Fidelity for Automated Driving Systems Simulation

Silicon Valley Mobility-Sven Beiker
  • Research Report
  • EPR2019007
Published 2019-12-06 by SAE International in United States
This SAE EDGE™ Research Report identifies key unsettled issues of interest to the automotive industry regarding the challenges of achieving optimal model fidelity for developing, validating, and verifying vehicles capable of automated driving. Three main issues are outlined that merit immediate interest:First, assuring that simulation models represent their real-world counterparts, how to quantify simulation model fidelity, and how to assess system risk.Second, developing a universal simulation model interface and language for verifying, simulating, and calibrating automated driving sensors.Third, characterizing and determining the different requirements for sensor, vehicle, environment, and human driver models.SAE EDGE™ Research Reports are preliminary investigations of new technologies. The three technical issues identified in this report need to be discussed in greater depth with the aims of, first, clarifying the scope of the industry-wide alignment needed; second, prioritizing the issues requiring resolution; and, third, creating a plan to generate the necessary frameworks, practices, and protocols.NOTE: SAE EDGE™ Research Reports are intended to identify and illuminate key issues in emerging, but still unsettled, technologies of interest to the mobility industry. The goal of…
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SAE Truck & Off-Highway Engineering: December 2019

  • Magazine Issue
  • 19TOFHP12
Published 2019-12-05 by SAE International in United States
Heavy-duty engine design What are the most significant factors influencing the way engine developers approach near-term design and development cycles? Two experts provide their insights from recent programs.Reducing winter range loss for electric trucks Researchers at the Austrian Institute of Technology have developed an air exchange system that's capable of reducing heat load by 37% in real-world tests.Narrower focus, bigger payoff Design teams are targeting focused markets for their commercial electric-vehicle programs to combat challenges like range and infrastructure.Removing complexity for autonomous trucks Narrowing the operating domains for driverless commercial vehicles reduces the requirements of autonomous technology and speeds time to market.Plastics innovations 2019 The 49th annual SPE Automotive Awards highlight the ongoing benefits of lightweight polymers and composites.Editorial Hop on the hydrogen highwayLeak testing of commercial-vehicle AC systems critical as move to HFO refrigerants loomsAkasol packs industry-leading energy density into new battery designMahle and partners develop super-efficient natural-gas engine for stationary powerHow battery technology will drive truck electrificationPlatinum nanoparticles for fuel-cell catalysts may cut costCaterpillar launches next-gen mini hydraulic excavator, skid steer and compact…
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Lighting Applications for Unmanned Aircraft Systems (UAS)

A-20B Exterior Lighting Committee
  • Aerospace Standard
  • ARP6336
  • Current
Published 2019-12-05 by SAE International in United States

This SAE Aerospace Recommended Practice (ARP) provides technical recommendations for the lighting applications for Unmanned Aircraft Systems (UAS). The technical content of this ARP discusses the unique trade-offs that are necessary to maintain commonality to the U.S. Federal Aviation Regulations (FARs) for aerospace lighting. The recommendations set forth in this document are to aid in the design of Unmanned Aircraft (UA) lighting for the size of aircraft and operation for which the aircraft is intended. In addition, certain concepts of operation for which UASs are suited will require unique lighting solutions.

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Component Nomenclature - Articulated Log Skidder, Rubber-Tired

MTC4, Forestry and Logging Equipment
  • Ground Vehicle Standard
  • J1109_201912
  • Current
Published 2019-12-04 by SAE International in United States

This SAE Standard includes names of major components and parts particular to this type of machine.