Theoretical study of composite tank for cryogenic propellent storage in a space rocket

Wartykule przedstawiono wyniki prac koncepcyjno-obliczeniowych przeprowadzonych w ramach projektu wstępnego kompozytowego, średniociśnieniowego zbiornika kriogenicznego, przeznaczonego do przechowywania ciekłego metanu lub tlenu, przeznaczonego dla drugiego stopnia niewielkiej, dwustopniowej rakiety kosmicznej.The article presents the results of conceptual and computational work carried out in the framework of the preliminary design of composite, cryogenic, medium pressure tank, intended for the storage of liquid methane or oxygen, onboard a second stage of a small, two-stage space rocket

Structural Diagnostic via Compressive Sensing

Wireless sensor networks (WSN) are built of spatially distributed nodes which are connected to one or more sensors. Each sensor node typically consists of several parts that are connected to an energy source like a battery, which limits the power resources of a wireless sensor. The major energy demanding parts in a sensor network node are the processor and the transmitter. Typically, those nodes that work continuously consume huge amounts of power. This suggested reducing the quantity of the obtained data to reduce the required power, of course without losing any important data. It means that the data should be sent through sensors with minimal additional operations performed by the processor. This is called the Compressive Sensing which is an innovative technique that fulfills the previously mentioned requirements. The aim of this research is to evaluate the reliability of compressive sensing when applied on signals obtained in real life. For this purpose; two types of signals are used with two different reconstruction algorithms. The obtained results are discussed and some conclusion remarks are presented