Marcin Bąkała

State Delays Extraction in the Fractional-Order State-Space Model

In the paper we analyse a fractional-order linear state-space model with multiple delays. We show that the multiple delay in the fractional-order state-space model introduces higher integer-order discrete differentiation action. Two fractional order state-space models without delays are derived. The equivalent models may be useful in the system stability analysis. The investigations are supported by numerical examples.

Integrated Platform for Automatic Measurement of Wettability and Surface Tension of Liquid Metals and Alloys in the High Temperatures

Abstract The article presents the construction of a new device that has been formed within the frames of a grant nr KBN N N519 441 839 - An integrated platform for automatic measurement of wettability and surface tension of solders at high temperatures. The authors have presented methodology and analytical concept of surface tension measurement using maximum pressure in gas bubble method. The results of examplary experiments are presented.