Optimization and redesign of a structurally loaded fused filament fabrication component: Numerical and experimental validation - Preprint -

Additive manufacturing provides the possibility to manufacture parts on demand and offers tremendous form freedom compared to traditional manufacturing methods. However, Fused Filament Fabrication (FFF) is not yet widely used for highly structurally loaded parts, as their strength is hard to control and to predict. In this work we aim to analyze...

Parameter Estimation for the Jiles-Atherton Model in Weak Fields

The purpose of this article is to estimate the parameters of the Jiles-Atherton hysteresis model, based on minor-loop measurement data in weak applied fields. The well-known hysteresis model by Jiles and Atherton serves as a basis of this article with an extension for the closure of minor loops. In order to represent minor loops correctly, a...

Frequency Response Based Multivariable Feedback Control Design for Transient RCCI Engine Operation

Reactivity Controlled Compression Ignition (RCCI) is a high efficient, pre-mixed combustion concept, which is characterized by controlled auto-ignition. RCCI control has to guarantee stable and safe operation for varying operating conditions. Research concentrated on next-cycle fuel path control, so far. However, a crucial step towards on-road...

Product uniformity control - A research collaboration of european steel industries to non-destructive evaluation of microstructure and mechanical properties

In steel manufacturing, the conventional method to determine the mechanical properties and microstructure is by offline, destructive (lab-)characterisation of sample material that is typically taken from the head or the tail of the coil. Since coils can be up to 7 km long, the samples are not always representative for the main coil body. Also,...

An inductive power transfer through metal object

The principle of Inductive Power Transfer (IPT)is very old but it is rarely used for transferring power from source to load via a conductive medium. This is because normally the medium restricts the power transfer due to losses or the shielding effects. However, for low energy applications, an acceptable amount of power could be transferred from...

Experimental demonstration of a new model-based SCR control strategy for cleaner heavy-duty diesel engines

Selective catalytic reduction (SCR) is a promising diesel aftertreatment technology that enables low nitrogen oxides (NOx) tailpipe emissions with relatively low fuel consumption. Future emission legislation is pushing the boundaries for SCR control systems to achieve high NOx conversion within a tailpipe ammonia (NH3) slip constraint, and to...

A dual-band planar array of connected dipoles: Experimental validation based on bistatic RCS measurements

Rigorous equivalent networks representing connected arrays in transmission and reception are derived in this paper. These equivalent networks are not based on reciprocity but on Green's functions. Thus, all components have well identified and physically meaningful roles. A dual-band connected array demonstrator is then presented to validate the...

Experimental validation of a truck roll model using asynchronous measurements with low signal-to-noise ratios

There is a large body of literature on model validation, but there is no method available that can effectively use asynchronous repeated measurements with low signal-to-noise ratios. The aim of this paper is to present a novel frequency-domain model validation method, which is suitable for this type of measurements. The practical relevance of...

Experimental validation of the twins prediction program for rolling noise. Pt.2: Results

Two extensive measurement campaigns have been carried out to validate the TWINS prediction program for rolling noise, as described in part 1 of this paper. This second part presents the experimental results of vibration and noise during train pass-bys and compares them with predictions from the TWINS program. The model is found to give quite...

Experimental validation of the twins prediction program for rolling noise. Pt.1: description of the model and method

The C163 Expert Committee of the European Rail Research Institute (ERRI) concerned with Railway Noise, has been developing theoretical models for the generation of wheel/rail rolling noise. These models have been brought together into a software package, called TWINS ("Track-Wheel Interaction Noise Software"). This is intended as a tool with...