Darula, Radoslav

The PhD project is focused on an implementation of the electromagnetic elements,i.e. devices capable to introduce non-linear electromagnetic forces into a mechanicalsystem. Furthermore, as the electromagnetic elements are connected to theelectric circuit, serving as a source of electromagnetic force, coupling of three physicaldomains, namely electrical, mechanical and magnetic, is established. Sincethe electromagnetic force is of a non-linear nature, the system constitutes a coupledmultidisciplinary non-linear problem. In the thesis the non-linear problem isaddressed from the analytical view point and a dynamical response at close to resonanceoperation region is analysed using the method of multiple scales. For themulti degree of freedom system a modal interaction is investigated. The operationregions are identied and discussion on control presented. The parameters of thecontroller are searched experimentally and the operation regions are veried bymeans of a numerical experiment as well as using simple experimental set-ups. A rapid reduction of an amplitude of vibration (due to additional damping) as wellas natural frequency reduction (detuning of resonance) are identied analytically,as well as experimentally

Semi-active vibration control by means of electro-magnetic elements

http://vbn.aau.dk/files/202328448/PhD_Thesis_VBNversion.pdf

Semi-active vibration control by means of electro-magnetic elements

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