Ingenieurwissenschaften und zugeordnete Tätigkeiten
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Institute
Probing joint strength and distortion in gas metal arc lap joining of aluminum and steel sheets
(2019)
Für individualisierte Beleuchtungen, bedarf es einer Kommunikation zwischen den Leuchten. Hierfür kann LED-Licht genutzt werden. Für die optische kabellose Kommunikation im sichtbaren Lichtbereich (bzw. Visible Light Communication – VLC) kann eine diskrete Pulsfrequenzmodulation (PFM) für den Einsatz mit indirektem Licht genutzt werden. Ein Konzept zur Pulsfrequenzmodu-lation (PFM) wird vorgestellt und experimentell analysiert. Aufbau und Funktionsweise der PFM werden anhand einer Simulation des Empfängers vorgestellt. Daran anschließend wird in der Sicherungsschicht das Listen Before Talk Verfahren zum koordinierten Kanalzugriff erläutert.
Gegenstand dieser Arbeit, ist die Rückgewinnung von Frequenzinformationen aus
pulsweitenmoduliertem Licht. Einleitend wird auf das zu bearbeitende Thema eingegangen.
Anschließend werden die Grundlagen erläutert, welche für das Verständnis
der Arbeit notwendig sind. Dem folgt ein Entwurf mit mehreren Möglichkeiten
zur Herleitung eines Satzes von PWM-Frequenzen. Danach wird auf Grundlage der
PWM-Frequenzen, eine Simulation für die Frequenzrückgewinnung durchgeführt.
Three-dimensional vibration of a ring with a noncircular cross-section on an elastic foundation
(2018)
Towards Practice-oriented Higher Education for Sustainable Rural Development in Western Kenya
(2021)
The workshop proceedings contain the written versions of the presentations of the Kenyan participants of the final workshop of the DAAD-funded cooperation project "Practice-oriented Higher Education in Western Kenya" (ProUniEdu-WeK) in August 2021 at the Brandenburg University of Applied Sciences (THB).
The contributions give an impression of what has been achieved in the last years on the way to practice-oriented higher education in the participating departments of the Masinde Muliro University of Science and Technology (MMUST) in cooperation with its partners from the THB and what is planned to be done in the years to come.
Tyre rolling kinematics and prediction of tyre forces and moments: part I - theory and method
(2012)
A new method to describe tyre rolling kinematics and how to calculate tyre forces and moments is presented. The Lagrange–Euler method is used to calculate the velocity and contact deformation of a tyre structure under large deformation. The calculation of structure deformation is based on the Lagrange method, while the Euler method is used to analyse the deformation and forces in the contact area. The method to predict tyre forces and moments is built using kinematic theory and nonlinear finite element analysis. A detailed analysis of the tyre tangential contact velocity and the relationships between contact forces, contact areas, lateral forces, and yaw and camber angles has been performed for specific tyres. Research on the parametric sensitivity of tyre lateral forces and self-aligning torque on tread stiffness and friction coefficients is carried out in the second part of this paper.
There are two aims for the second part of this paper: verifying the theory presented in the first part through parameter variation and comparison between simulation and experiment, and to study the effect of the belt structure on the cornering properties of radial tyres. Research has been carried out with a passenger car radial tyre and two different kinds of truck or bus radial tyres using both simulation and experiment. This second part of the paper shows that belt structure plays an important role in the generation of tyre forces and moments in addition to the effects of the tread stiffness and friction coefficients. The theory and method presented in this paper opens a new robust way to predict the tyre forces and moments from the tyre design and provides a reliable model for a generation mechanism.
Urformen
(2018)