Mechanics and Control
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ISSN 2083-6759
e-ISSN: 2300-7079
Issue Date
2015
Volume
Vol. 34
Number
No. 3
Description
Journal Volume
Mechanics and Control
Vol. 34 (2015)
Projects
Pages
Articles
Test bed for simulation of magnetic field measurements of low earth orbit satellites
(Wydawnictwa AGH, 2015) Gallina, Alberto; Zagórski, Paweł; Rachucki, Jakub
This paper presents a test bed designed to simulate the magnetic environment experienced by a spacecraft in a low Earth orbit. It consists of a spherical air bearing located inside a Helmholtz cage. The spherical air bearing is used for simulating the microgravity conditions of orbiting bodies, while the Helmholtz cage generates a controllable magnetic field resembling the one surrounding a satellite during its motion. Dedicated computer software is used to initially calculate the magnetic field in an established orbit. The magnetic field data is then translated into current values and transmitted to programmable power supplies that energize the cage. The magnetic field within the cage is finally measured by a test article mounted on the air bearing. The paper provides a description of the test bed and test article design. Experimental tests prove the good performance of the entire system.
Strength study on soda-lime-silicate-toughened glass
(Wydawnictwa AGH, 2015) Ładecki, Bogusław
Toughened soda-lime-silicate glass is a popular material widely used in construction due to its very good functional properties, characterized by its high strength, safety in use, fire resistance, and good thermal insulation. In this study, tests were conducted to describe the dependence between the bending strength of ESG-toughened float glass and the thickness of the sample, state of the sample edge, and application of security film. Tests were also conducted on the influence of the placement of openings needed for mounting glass screens used to secure display cases and other objects of a similar nature. The information obtained was used to design glass security screens and a new type of display case, a closed cassette with a glass screen intended for use in protecting works of art from acts of vandalism and the destructive influence of environmental conditions.