Pseudo Forces in Yarn Unwinding from Packages
Stanislav Praček

Stanislav Praček, Department of Textile, NTF, University of Ljubljana, Snežniška, SI-Ljubljana, Slovenija.
Manuscript received on 09 May 2019 | Revised Manuscript received on 19 May 2019 | Manuscript Published on 23 May 2019 | PP: 1345-1348 | Volume-7 Issue-6S5 April 2019 | Retrieval Number: F12330476S519/2019©BEIESP
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Abstract: In a recent paper we have shown the origin of the pseudo forces in equations of motion in a non inertial observation frame. In addition to Coriolis and centrifugal force, there is another pseudo force in rotating frames with time dependant angular velocity. This force affects the yarn dynamics. Using experimental data as an input, we will calculate oscillations of yarn tension for different package geometries and winding angles. We show how the winding angle and the package radius influence the angular velocity of the yarn during the unwinding. Since the pseudo forces on the yarn in the balloon depend on the angular velocity, this velocity has a large influence on the oscillations of yarn tension that we wish to reduce.
Keywords: Pseudo Forces, Dynamics of Yarn, Balloon Theory, Non Inertial Systems.
Scope of the Article: Digital Signal Processing Theory