Open AccessVibrations in Single-Degrees-of-Freedom Sampled-Data Linear Mechanical Systems
Author(s) -
Csaba Budai
Publication year - 2021
Publication title -
periodica polytechnica. mechanical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.259
H-Index - 16
eISSN - 1587-379X
pISSN - 0324-6051
DOI - 10.3311/ppme.19150
Subject(s) - vibration , harmonics , mechanical system , sampling (signal processing) , degrees of freedom (physics and chemistry) , sampled data systems , linear system , control theory (sociology) , physics , mathematics , computer science , acoustics , mathematical analysis , engineering , control system , control (management) , optics , mechanical engineering , electrical engineering , quantum mechanics , voltage , artificial intelligence , detector
This paper aims to present that the effect of sampling can result in multi-frequency vibration even in the case of a single-degree-of-freedom linear mechanical model. Even though the sampled-data systems have an infinite number of characteristic exponents due to sampling, the vibrations of these systems can still be characterized by an effective system model with a single dominant frequency. However, as this paper shows, additional harmonics become relevant, resulting in multi-frequency vibrations depending on the magnitude of applied control parameters. The vibrations presented by the time histories of vibration and their spectra resulted in numerical simulation of the sampled-data system.