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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Identification of dynamic properties of built electrodynamic shaker
 Šnábl, Pavel ; Kozánek, Jan ; Pešek, Luděk
Electrodynamic shaker was built in our institute for excitation of vibrating blade in a flow field. The shaker consists of permanent magnet and voice coil, 3D printed body, core and cover, and two at suspension rings laser-cutted from Pertinax. For simulation purposes of the whole system, identfication of shaker dynamic parameters was needed. Several identification methods in time or frequency domain were used, and it was shown that the shaker model must contain nonlinear stiffness in order to describe the real system more accurately.
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Accuracy of the analytical methods developed for blade tip-timing analysis
 Maturkanič, Dušan ; Procházka, Pavel ; Kozánek, Jan
Within the research of methods for precision solution of rotor blade vibration based on the philosophy of Blade Tip-Timing at the Institute of Thermomechanics AS CR, v.v.i., the effort was concentrated on the decomposition of measured data. This paper describes the accuracy of analytical methods taking into consideration the errors of the measured sensors or the influence of the measurement conditions on the results.
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