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Dynamic properties of some physical models of artificial vocal folds
Šidlof, Petr ; Veselý, Jan ; Horáček, Jaromír
The report presents results from measurements of acoustic and vibratory characteristics of six originally designed artificial vocal fold prototypes made of silicon rubber and based on various aeroelastic principles. During measurements, the dynamic subglottal pressure and output acoustic pressure were recorded. Spectral analysis of the signals was performed, and where the construction permitted, the vibrations were also observed by means of videostroboscopy. For two prototypes a shape and material optimization is possible with the aid of the mathematical models developed in IT AS CR.
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Pohyb rotoru ve dvou bezdotykových ložiskách
Půst, Ladislav ; Kozánek, Jan ; Veselý, Jan
Two problems of contactless bearing-passive magnetic bearing and aerodynamic bearing - are presented. Numerical solution of 6 differential equations enable to study the influence both of the rotor weight and of impacts in retainer bearings on the dynamic responses of unbalanced rotor. A new method of measurement and evaluation of segment motion in aerodynamic bearings is proposed and tested.
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