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Journal Article

Integration of Component Design Data for Automotive Turbocharger with Vehicle Fault Model Using JA6268 Methodology

Suppliers and integrators are working with SAE’s HM-1 standards team to develop a mechanism to allow “Health Ready Components” to be integrated into larger systems to enable broader IVHM functionality (reference SAE JA6268). This paper will discuss how the design data provided by the supplier of a component/subsystem can be integrated into a vehicle reference model with emphasis on how each aspect of the model is transmitted to minimize ambiguity. The intent is to enhance support for the analytics, diagnostics and prognostics for the embedded component. In addition, we describe functionality being delegated to other system components and that provided by the supplier via syndicated web services. As a specific example, the paper will describe the JA6268 data submittal for a typical automotive turbocharger and other engine air system components to clarify the data modeling and integration processes.
Journal Article

Powder Reuse and Its Effects on Laser Based Powder Fusion Additive Manufactured Alloy 718

Laser Based Powder Bed Fusion, a specific application of additive manufacturing, has shown promise to replace traditionally fabricated components, including castings and wrought products (and multiple-piece assemblies thereof). In this process, powder is applied, layer by layer, to a build plate, and each layer is fused by a laser to the layers below. Depending on the component, it appears that only 3-5% of the powder charged into the powder bed fusion machine is fused. Honeywell’s initial part qualification efforts have prohibited the reuse of powder. Any unfused powder that exits the dispenser (i.e., surrounds the build or is captured in the overflow) is considered used. In order for the process to be broadly applicable in an economical manner, a methodology should be developed to render the balance of the powder (up to 97% of the initial charge weight) as re-usable.
Technical Paper

Lightning Requirements: Where They Come From and How to Analyze Their Impact

Many avionics and aircraft equipment manufacturers use DO-160 [Ref. 1] Section 22 to test their equipment for indirect effects of lightning without understanding why they are testing to specific values. Many aircraft manufacturers struggle with determining the level of indirect lightning that will be acceptable for their vehicle and what level of requirements they need to pass down to the avionics and aircraft equipment manufacturers. Organizations like SAE and RTCA, Inc. work to collect data on lightning and spend countless hours assimilating the information and developing documents to help engineers use the information. They struggle with knowing what data is pertinent and how it will be received and used by the engineering community.
Technical Paper

Using Datasheet Information to Predict the Power Dissipation of a Hybrid Silicon Carbide IGBT Module in a Voltage Source Inverter

In this paper a method of predicting the power dissipation in a hybrid Silicon Carbide IGBT power module using primarily the information available from the datasheet is shown. Mathematical modeling of the switching device is accomplished using MathCAD for the purpose of power dissipation calculation. The power dissipated is calculated on a pulse-by-pulse basis to allow for any arbitrary waveform to be studied. The mathematical model is validated by way of comparing the results with the power dissipation results calculated by manufacturer's proprietary software.