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A real-time railway catenary model for Hardware-inthe-Loop tests
| Content Provider | Semantic Scholar |
|---|---|
| Author | Talic, Emir |
| Copyright Year | 2016 |
| Abstract | The present PhD Thesis provides my scientific results of a research project at the Vienna University of Technology since November 2012 until December 2015. The publications originated in the course of a cooperation project between the Institute of Mechanics and Mechatronics (Division of Control and Process Automation), and SIEMENS (former MELECS) as industrial partner. The project has been funded by the Austrian Research Promotion Agency (FFG No. 836449). Hardware-in-the-Loop (HiL) test rigs allow for efficient testing of parts and components and are widely used in automotive, electronics and train industries. The part or component, denoted as unit-under-test is embedded into the HiL test rig and interacts with a virtual model via defined electrical and/or mechanical inputs and outputs. HiL test rigs enable realistic testing under laboratory conditions, however, the (virtual) model has to be executed in real-time. This thesis presents a real-time capable railway catenary model, which has been successfully tested on an innovative HiL pantograph test rig. The real-time capable catenary model is obtained by mathematical modeling, considering all relevant catenary parts: the carrier and contact wire, the droppers and the masts. The catenary is a spatially distributed system and as such its dynamics are described by coupled partial differential equations (the Euler-Bernoulli beam equations). These equations model the wave propagation arising from the catenary pantograph interaction. To reduce the computational effort a fixed pantograph interacts with a moving catenary. This approach has the advantage that only a limited area of the catenary has to be modeled. At an actual catenary the waves propagate in an unimpeded manner because of its spatial extension. This "unbounded" domain is modeled for the catenary model by imposing absorbing boundary conditions. This boundary conditions have not been investigated for Euler-Bernoulli beam before. Because of that a optimization based methodology is developed to determine well-performing and stable absorbing boundary conditions. This methodology is generic and can be used for partial differential equations with wave propagation effects. To identify the physical parameters of a Euler-Bernoulli beam, a multi-objective optimization methodology is developed and verified on an wire test rig. Stability is guaranteed for the resulting numerical model, which is crucial for HiL applications. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://publik.tuwien.ac.at/files/PubDat_251456.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
