Influences of system parameters on energy harvesting from autoparametric absorber. Experimental research

In the paper an experimental analysis of an autoparametric system dedicated to vibration suppression and energy recovery is presented. The main part is an electromagnetic energy harvester. Its properties were defined by quasi static and dynamic tests. The obtained results show influence of selected parameters on energy recovery level. The experimentally identification of electromechanical coupling coefficient which couples mechanical and electrical systems is done

Influences of system parameters on energy harvesting from autoparametric absorber. Numerical research

In the paper a numerical analysis of an autoparametric system is presented. The two main elements of a tested system are the pendulum (tuned mass absorber) and an energy harvester. The electromechanical model takes into account these both effects. Numerical simulations are made in a MATLAB software environment. The obtained results allowed estimation of influence of the system parameters on efficiency of energy harvesting

Chemical modificaton of nanodiamond powders produced by detonation method

Nanodiamonds are diamond particles measured in nanometers. The ideal nanodiamond molecule should have surface ability to bind with many organic groups. They are also susceptible to chemical modifications. Nanodiamonds due to their biocompatibility and low toxicity, can be used for biological materials or in medicine. They can also be used as drug carriers and as covalent and electrostatic binding to the active biomolecules. This review describes the chemical modification of nanodiamond powders. This research work aimed and gain new knowledge, understanding and interpretation of the phenomena occure during the chemical functionalization of nanodiamond powders. An observation and an analysis of the mechanisms of chemical bonds formation or physical interactions will broaden the knowledge in this field. An examination of the impact of organic groups on the nanodiamond surface and onto its physical and chemical properties contribute to the selection of the best method of modification. An implementation research allows to broaden the knowledge in the field of chemical surface modification of nanodiamonds powders

Analiza efektywności autoparametrycznego wahadłowego tłumika drgań

This paper presents results of a study of a dynamic response of an autoparametric system consisting of the oscillator with an attached pendulum vibration absorber. The harmonic balance method is applied to get the autoparametic resonance conditions. The analytical full vibration absorption condition has been determined and verified by numerical simulations. Additionally, the influence of oscillator and pendulum damping on dynamics and the vibration absorption effect is presented.W pracy przedstawiono analizę dynamiki autoparametrycznego układu składającego się z oscylatora wraz z dołączonym eliminatorem drgań w postaci wahadła. W celu uzyskania obszarów rezonansu autoparametrycznego zastosowano metodę bilansu harmonicznych. Wyznaczono analitycznie,a następnie zweryfikowano numerycznie warunek pełnej eliminacji drgań. Dodatkowo, przedstawiono wpływ tłumienia oscylatora i wahadła na zjawisko eliminacji drgań oraz dynamikę układu