Browsing by Subject "Digital measurement systems"

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    A digital measurement system based on laser displacement sensor for piezoelectric ceramic discs vibration characterization
    (Elsevier GmbH, 2016) Parali L.; Pechousek J.; Şabikoʇlu I.; Novak P.; Navarik J.; Vujtek M.
    This study describes the innovative design of a digital measurement system based on a laser displacement sensor (LDS) as a vibrometer which is capable to measure a dynamic displacement response dependence on a stimulated vibration. The frequency response of a piezoelectric ceramic disc is obtained by processing the input/output signals obtained from the function generator and digital oscilloscope (digitizer) cards driven by a personal computer. Resonant frequencies of vibration are achieved utilizing the swept-sine signal excitation following the peak values in the signal response measured by LDS. The analogue signal from LDS controller represents directly a mechanical vibration of a piezoceramic disc. The test measurement results indicate that the system can distinguish resonance frequencies of piezoelectric ceramic discs up to 40 kHz with the resolution 1 Hz. Piezoelectric coefficient d33 and its linearity along the excited voltage amplitudes have been calculated by the applied methods as a demonstration of a successful system concept. The results achieved are in compliance with the reference value declared by the manufacturer of the piezoceramic disc. © 2015 Elsevier GmbH. All rights reserved.
  • No Thumbnail Available
    Item
    Vibration modelling of piezoelectric actuator (PEA) using Simulink software
    (Institute of Electrical and Electronics Engineers Inc., 2017) Parali L.; Sari A.
    This paper presents to define a vibration modelling of a PEA using MATLAB-Simulink software based on a single degree freedom mechanical model. The experimental vibration displacement values of PEA have been carried out utilizing the swept-sine signal excitation following the peak values in the signal response measured as contactless by the laser displacement sensor. Harmony between the mathematical modelling and experimental values have been observed from 96.6 to 81.4 % between excitation amplitudes of 0.5 and 3.0 V when the vibration modelling of PEA is normally taken into consideration with a linear working range. Therefore, obtained this vibration modelling could be used as training-testing tool for estimating vibration characterization of an actuator under any excitation voltages. © 2017 IEEE.