Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"frequency-domain modelling"”.
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Frequency-domain modelling of floating wind turbines
… requires the development of new approaches to modelling the combined platform-turbine system. In this thesis a linearised frequency-domain approach is developed which gives fast but approximate results: linearised models of the structural dynamics, hydrodynamics, aerodynamics and control system …
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Time-frequency domain modelling for ultrasonic nondestructive testing
… transform allows for retention of both time and frequency domain information simultaneously and permits the in homogeneous wave equation (with a forcing function prescribed as a linear chirp modulated by a Gaussian envelope) to be solved in time-frequency space. This in turn facilitates a …
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Time and frequency domain modelling of the piezoelectric transducer
A new model for piezoelectric ultrasonic transducers is proposed. Using a systems engineering approach, the concept of feedback is used to explain secondary piezoelectric effects and to clearly describe electro-mechanical interaction. The model is derived from the fundamental piezoelectric …
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Steady-State Time-Domain Analysis of LLCL Resonant Converter
… MOSFET switches for a wider range of operating frequency as compared to conventional LLC resonant converter topology. The proposed topology (LLCL) is a modified form of conventional LLC resonant converter topology where an additional inductor is connected in parallel with the LLC resonant tank …