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This article presents mechanical vibrations exciter, which is electrohydraulic device designed to extorting bi-axial vibrations. The priority task of exciter is to excite physical model with related to exploitations real conditions parameters of signals The building of working device and his important assemblies are described. The most important part of exciter is electrohydraulic control system which...
This paper aims to present the throttle valve, in which a piezoelectric stack was used for adjustment of the flow section area of the throttle aperture. The valve was built based on a proprietary design, using the components of a standard manufactured overflow valve. Laboratory tests were carried out to establish the valve's characteristics, describing its usefulness for control of small flow intensity...
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