%0 Journal Article %T Eenergy Extraction from air or Water by Vibrations %A J. Viba %A L. Shtals %A M. Eiduks %J Latvian Journal of Physics and Technical Sciences %D 2009 %I Versita %R 10.2478/v10047-009-0005-2 %X The paper considers the possibility to derive energy from air or water in a non-traditional way (without using rotating equipment). For this purpose, the authors studied variations in the additional area of a vibrating object in a definite sequence found as the solution of an optimisation problem. In the work, stably moving mechatronic systems were synthesised and modelled, whose control is very simple (not requiring calibration), being a function of the changing sign of phase coordinates. %K Motion control %K air/water excitation %K optimal control %K adaptive control %K energy derivation/utilization %U http://versita.metapress.com/content/0282p3376370v4n3/?p=672515eade234555929cbcb6b8a06cc2&pi=0