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“Good Vibrations” Achieve Higher Productivity, Higher Quality and Higher Tool Lifetime

With 1 billion rivets per year for aircraft structural components, the drilling of rivet holes is a key step in the production and assembly of airplanes. The performance of the aircraft structural components depends significantly on the quality of the produced borehole. Furthermore, these boreholes are created at the end of the value chain and errors cause significant additional costs. In addition to the high quality requirements, the costs per borehole are an important profitability factor. To improve quality and minimize costs, fully automated robots and CNC machines are used. LTI Motion has been awarded with an Innovation Award for its magnetically levitated drilling spindle, revolutionizing the drilling of aluminum, titanium and carbon fiber in aviation. The fully automatic innovative drilling process is up to 3 times faster, with better quality and lower tool costs.

Φ-Sensitivity and ITHR – Key Fuel Properties for Advanced Compression Ignition Engines

Ф-sensitivity is a fuel property that has important benefits for the operation and control of Low-Temperature Gasoline Combustion (LTGC) and other Advanced Compression Ignition (ACI) engines. A fuel is φ-sensitive if its autoignition reactivity varies with the fuel/air equivalence ratio (φ) for the same temperature/pressure history. Combining φ-sensitive fuels with multiple-injection strategies that produce a φ distribution in the cylinder at the time of autoignition, can provide several benefits. First, the φ distribution results in a sequential autoignition that reduces the peak HRR, reducing noise, allowing higher loads without knock, and/or reducing the required CA50 retard for higher efficiencies. Second, because richer regions autoignite faster, CA50 can be controlled by varying the amount of fuel stratification.

xEV Marketplace Evolution – Keeping CCS Modern

With the electrified vehicle marketplace changing in ways that are both unprecedented and unpredictable, it is imperative that both OEMs and standardization bodies remain agile and receptive to the needs of a totally new customer base. BMW has a vision of how these organizations should interact in order to most smoothly bring new solutions from concept to interoperable products in the marketplace.

eVTOL Perspectives from a Private Pilot

Vertical Take-off and landing vehicles are important for our transportation dilemma but also for saving General Aviation. Mr. Tibbitts explores history and current trends that make eVTOL the only reasonable choice for urban and suburban air travel.

X-57 Electric Propulsion Operations and Challenges

The X-57 experimental technology demonstrator aircraft showcases an all-electric drivetrain with a 56 kWh battery system driving 14 motors totaling 250 kW. These technologies enable novel aerodynamic benefits, but also introduce new challenges to aircraft integration, test, maintenance, and operations. These challenges include new hazards for the general aviation environment such as lithium-ion battery energy storage, high voltage power distribution, and primary traction motor control. Certification challenges include software assurance for critical torque controllers, communication in severe EMI environments, and flight envelope expansion of developmental hardware such as silicon-carbide inverters. This presentation highlights some of the key lessons learned from the development of this research vehicle. The X-57 Maxwell aircraft is being converted to its first all-electric configuration and will begin final integrated test and flight operations in late 2019.

Worldwide OBD Requirements Update

On-Board Diagnostic (OBD) system requirements were first developed by the California Air Resources Board (CARB), the U.S. Environmental Protection Agency (EPA), and the European Commission. After the introduction of OBD with these two major systems (US CARB / EPA and European Commission), OBD requirements were adopted by various countries around the world. The history and latest status of OBD requirements around the world are reviewed by country. During this review, changing requirements and recent developments from the last presentation of Worldwide OBD Requirements Update (March 2018 European SAE OBD Symposium) are highlighted.

Workshop: Introduction to Propulsion Simulation Using NPSS

Instructors: David L. Ransom, Charles Krouse, Brendan Nelson-Weiss, Southwest Research Institute & Tom Lavelle, NASA Objective: Provide insight into the modeling of gas turbine engines, design and off-design analysis, and the interactions between the propulsion, power and thermal management systems.